Sat scores l around the nation tend to have a mean score around 500, a standard deviation of about 100 points and are approximately normal distributions. a person who scores 600 on the sat 1 has approximately what percentile rank within the population? please show all calculations
Your course is very, very, very dated.
Show calculations? These are done with tables, or a calculator, or a computer applet. Not even superman could do this calculating on paper with pencil.
http://davidmlane.com/hyperstat/z_table.html
I recommend you do it with this applet, getting the answer, then use your calculator to get the same answer, and finally, do it with the normal tables in the back of your book.
suppose we have a set of blood pressures with a mean of 80 diastolic, and standard deviation of 5 points. assuming a normal distribution of blood pressures, what two values should 95% of all blood pressures lie? show all calculations.
*please help as i have no calculation or any other materials to help solve. thank you. i am really in panic mode.
Use the same applet( the second one)Enter the mean, std deviation, click between, and in the shaded area, type.95
what do you mean by appplet? can you please show how you got your calculations i have no way or means to do this. i am really lost and am upset becasue this question has been bugging me for hours now. i am really frustrated, please help by showing the work. thank you very much.
To determine the percentile rank of a score, you need to follow these steps:
Step 1: Calculate the z-score of the given score.
Step 2: Use the z-score to find the area under the standard normal curve.
Step 3: Convert the area to a percentile rank.
Let's go through each step:
Step 1: Calculate the z-score.
The z-score formula is: z = (x - μ) / σ
where x is the individual score, μ is the mean, and σ is the standard deviation.
In this case, x = 600, μ = 500, and σ = 100.
z = (600 - 500) / 100 = 1
Step 2: Find the area under the standard normal curve.
The standard normal distribution has a mean of 0 and a standard deviation of 1. We need to find the area to the left of the z-score of 1. You can use a z-table or a calculator to find this area.
Using a z-table, we can find the area to the left of z = 1 is approximately 0.8413.
Step 3: Convert the area to a percentile rank.
To convert the area to a percentile rank, we need to subtract the area from 1 and multiply by 100.
Percentile rank = (1 - 0.8413) * 100 = 0.1587 * 100 = 15.87
Therefore, a person who scores 600 on the SAT has an approximate percentile rank of 15.87 within the population.