![]() ![]() Here is how we would analyze our data using these built-in Excel functions. R-squared, r 2: =RSQ(known_y's, known_x's).Correlation Coefficient, r: =CORREL(known_y's, known_x's).y-intercept, b: =INTERCEPT(known_y's, known_x's).In the statistics section of this tutorial. The slope, y-intercept, correlation coefficient, and R-squared valuesĪre SLOPE(), INTERCEPT(), CORREL() and RSQ(), and are also covered Routine uses linear regression to calculate the slope, y-intercept and correlationĮxcel has three built-in functions that allow for a third method for determining You should now see that the Excel graphing R 2 = 0.9488, which is agrees with the graph. From the graph, we see that R 2 = 0.9488.įrom our linear regression analysis, we find that r = 0.9741, therefore More familiar trendline from the graph in the first section namelyĮxcel can be used to display the R-squared value. Using linear regression techniques are identical to the values of the It is plain to see that the slope and y-intercept values that were calculated Linear regression with built-in functions. Y-intercept and correlation coefficient are highlighted in yellow. Given in the previous section to calculateĬorrelation coefficient (r) of the data. Finally, use the above components and the linear regression equations.=COUNT(B3:B8) and is shown in the formula bar in the screen shot below. The syntax for COUNT() in this example is: Now use Excel to count the number of data points, n. ![]() Additionally, the term xy is the product of x and Three columns that will be used to determine the quantities xy, We can expand our spread sheet to include these components. We see that their components are nothing more than simple algebraic manipulations of the It may appear that the above equations are quite complicated, however upon inspection, Implicitly applying regression to the sample data. (Note that the limits of the summation, which are i to n,Īnd the summation indices on x and y have been omitted.) With n data points, the slope, y-intercept and correlation coefficient, r, To the data and determine these constants. It is not necessary for us to plot the data in order to If we expect a set of data to have a linear correlation, (ValuesĬlose to 1 indicate excellent linear reliability.))Įnter your data as we did in columns B and C. The linear relationship between the x and y values. Or R, the correlation coefficient gives us a measure of the reliability of Statistical texts show the correlation coefficient as " r", butĮxcel shows the coefficient as " R". Recall that the R-squared value is the square of the correlation coefficient. ![]() Trendline and display its slope, y-intercept Let's enter the above data into an Excel spread sheet, We can then find the slope, m, and y-intercept, b,įor the data, which are shown in the figure below. Of course, this relationship is governed by the familiar equation We can plot the data and draw a "best-fit" straight line through the data. There exists a linear relationship between the variables x and y, You may also wish to take a look at how we analyzed actual (See our Tutorial Page for more information about ![]()
0 Comments
![]() High-pitch means small wavelength, and the size of a musical instrument is directly related to the wavelengths of sound it produces. Small instruments, such as a piccolo, typically make high-pitch sounds, while larger instruments, such as a tuba, typically make low-pitch sounds. You may have noticed that the pitch range produced by an instrument tends to depend upon its size. Recall that the perception of frequency is called pitch. Yet another way that people make sounds is through playing musical instruments (see the previous figure). Additional processing in the brain also allows us to determine which direction the sound is coming from (based on comparison of the sound’s arrival time and intensity between our two ears).įigure 14.13 Playing music, also known as “rocking out”, involves creating vibrations using musical instruments. This allows us to detect the pitch of sound. The tectorial membrane vibrates at different positions based on the frequency of the incoming sound. These hair cells, and their attached neurons, transform the motion of the tectorial membrane into electrical signals that are sent to the brain. The motion of the tectorial membrane stimulates tiny cilia on specialized cells called hair cells. This creates pressure waves in the fluid that cause the tectorial membrane to vibrate. As the middle ear bones vibrate, they vibrate the cochlea, which contains fluid. This protective reaction can also be triggered by your own voice, so that humming during a fireworks display, for example, can reduce noise damage.įigure 14.12 shows the middle and inner ear in greater detail. They react to intense sound in a few milliseconds and reduce the force transmitted to the cochlea. Two muscles in the middle ear protect the inner ear from very intense sounds. The lever system of the middle ear takes the force exerted on the eardrum by sound pressure variations, amplifies it and transmits it to the inner ear via the oval window. The middle ear converts sound into mechanical vibrations and applies these vibrations to the cochlea. The outer ear, or ear canal, carries sound to the eardrum protected inside of the ear. ![]() The body part normally referred to as the ear is technically called the pinna.įigure 14.11 The illustration shows the anatomy of the human ear. The ear converts sound waves into electrical nerve impulses, similar to a microphone.įigure 14.11 shows the anatomy of the ear with its division into three parts: the outer ear or ear canal the middle ear, which runs from the eardrum to the cochlea and the inner ear, which is the cochlea itself. The sound wave that hits our ear is a pressure wave. The way we hear involves some interesting physics. The perception of frequency is called pitch, and the perception of intensity is called loudness. Sounds below 20 Hz are called infrasound, whereas those above 20,000 Hz are ultrasound. You may have noticed that dogs respond to the sound of a dog whistle which produces sound out of the range of human hearing. ![]() Dogs can hear sounds as high as 45,000 Hz, whereas bats and dolphins can hear up to 110,000 Hz sounds. Other animals have hearing ranges different from that of humans. Humans can normally hear frequencies ranging from approximately 20 to 20,000 Hz. It can give us plenty of information-such as pitch, loudness, and direction. A voice becomes louder when air flow from the lungs increases, making the amplitude of the sound pressure wave greater. A voice changes in pitch when the muscles of the larynx relax or tighten, changing the tension on the vocal chords. This vibration escapes the mouth along with puffs of air as sound. As air travels up and past the vocal cords, it causes them to vibrate. These folds open and close rhythmically, creating a pressure buildup. People create sounds by pushing air up through their lungs and through elastic folds in the throat called vocal cords. Power is the rate at which energy is transferred by the wave. In general, the intensity of a wave is the power per unit area carried by the wave. Figure 14.10 shows such a cartoon depiction of a bird loudly expressing its opinion.Ī useful quantity for describing the loudness of sounds is called sound intensity. In cartoons showing a screaming person, the cartoonist often shows an open mouth with a vibrating uvula (the hanging tissue at the back of the mouth) to represent a loud sound coming from the throat. But in a traffic jam filled with honking cars, you may have to shout just so the person next to you can hear Figure 14.9.The loudness of a sound is related to how energetically its source is vibrating. ![]() In a quiet forest, you can sometimes hear a single leaf fall to the ground. Sound intensity is defined as the sound power per unit area, whereas amplitude is the distance between the resting position and the crest of a wave. While sound intensity is proportional to amplitude, they are different physical quantities. ![]() Students may be confused between amplitude and intensity. ![]() ![]()
![]() ![]() Not a special procedure, but an ordinary list of everyday tasks. A routine is generally regarded as a flow or order of things you do. Create a routineĬreating a homeschool routine will give you some structure in your day to go by. Just be sure to be an inspirational, encouraging boss. But treating your homeschool like a business is important to success. Of course, there’s no immediate financial gain because of this. It really is true.ĭedication, time management, and constant concern for your business and employees are very much like a business owner’s concerns. I have never thought of myself as an entrepreneur till my husband pointed this out recently. You are taking on the risk of this “business” and betting on yourself and your “employees” to be successful. You are organizing your own entity separate from others. Several hours each day, I set aside time to educate my kids. Something that has helped me over the years has been to think of homeschooling my kids like it’s my job. Not everyone can make homeschooling first priority, but keeping it at least near the top will make your homeschool more successful. But when you make homeschooling a priority, you will be more successful by scheduling those extra things outside of your homeschool time. I t is easy to let other things creep into your schedule, Doctor appointments, play dates, and classes. We are preparing them for the world beyond our homes.Īllow homeschooling to take a major part in your schedule and work other things around it. Even if you have other large commitments, it cannot be an afterthought.Įducating our children is one of the most important things we can do as parents. Choosing to homeschool means it needs to be a priority in your life. Homeschooling your kids is a big commitment. To learn more about planning a weekly schedule for your family, read my post Plan Your weekly homeschool schedule in 10 easy steps. ![]() Your daily routine homeschool schedule will fit within those other schedules.įor my best tips on creating your daily schedule, read my post 10 Tips for Creating a daily homeschool schedule that works. If you’d like tips on your daily schedule or weekly schedule, I have also created posts on those. As a homeschooling mom, we have our whole lives, days, and weeks to plan. Your daily homeschool routine is the actual homeschooling tasks you do. But it is the general order of subjects in your day. This is not the specific topics you will cover each day, that’s for another post. Giving you some structure to accomplish your goals. Setting up a homeschool routine will help you think through what you want to do and how. It should be general guidelines you can use to move through your day. This does not at all have to be strict or inflexible! Actually the opposite. The time you have set aside specifically to homeschool and the general way in which you accomplish that task. Pin me! What is a daily routine homeschool schedule?Ī daily routine homeschool schedule is the routine for your homeschool day. Design a daily routine homeschool schedule.Printable daily routine homeschool schedule.What is a daily routine homeschool schedule?. ![]() ![]() Once the download completes, the installation will start and you'll get a notification after the installation is finished.Game creation system, massively multiplayer online ![]()
![]() “I am an administrator with 5 years of experience in a busy role. Take this Office Administrator job advert for example:Īn administrator applying for this role might write the following personal statement: It should be written with reference to the job advert / person specification. The personal statement is a concise intro which tells a prospective employer in a few sentences why you’re the right person for the job. You can find out more about this in our guide : Building a killer LinkedIn profile to complement your CV (2) Personal statement If you have a detailed career history and feel limited by the constraints of a two-page CV, you may wish to create a more detailed online CV using LinkedIn and provide a link to it in your CV. So what should each of these sections contain? (1) Contact details However, since administrative work is highly skills focused, we’d recommend placing it after the personal statement as above. ![]() The skills section can be placed below the personal statement, or below the education section. Even just researching the software programs you’d like to use, and then leaving it open for alternative suggestions, demonstrates to potential employees that you value this quality.So you’ve found your perfect admin CV template – but how do you write a cracking admin CV? In this guide, we’ll explore each aspect of writing a CV for an administrator, from what skills to include through to how to present your work experience.Įvery administrator CV should have seven key sections. You needn’t be a total techie to research the kinds of software you’d like to integrate into your business.Prove to potential employees that you value clear and upfront communication by answering likely questions in your job description before an applicant has to ask about them-such as why you’re hiring, what your company health insurance benefits are, where the company is located, and what work will be expected of a new hire. Being a proactive communicator isn’t just a skill that’s essential for administrative assistants.Of course, you need to hire someone who’s organized, but have you organized the layout of your job description? Make sure it’s broken up into clear, distinct sections.The question is, are you emphasizing that you value these qualities in yourself and the company? After all, it’s unfair to expect such high standards if the business itself seems to have a flagrant disregard for them. ![]() If you feel like you’re anxiously awaiting the moment you can finally hire an administrative assistant, you know you need someone who’s an organizational guru, a proactive communicator who’s always one step ahead, and someone with computer know-how. ![]() We ask a lot of our administrative assistants, so make sure you keep these values in mind while you write your job description: Being open and honest at the beginning of the recruiting process is critical to finding the right candidate. Tell administrative assistants exactly why you need help they’ll appreciate your candor. In our first example, the company made it clear that they need help modernizing their business away from paper notes and bookkeeping. Notice how the job description samples above focus on the why? For example, our executive administrative assistant job description lets potential employees know right from the start that they need to hire someone who can help streamline their systems in the face of unprecedented growth. Give thought to who you need on your team and why ![]() |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |