Advanced Placement (AP), 12.04.2021 23:00 AutumnGarringer

A study of statistical data reveals that when a normal distribution occurs, 68% of the population will have a value within one standard deviation of the mean, and 95% of the population will have a value within two standard deviations of the mean. ←68%→
←←←←95%→→→→
‐2 sd ‐1 sd mean +1 sd +2 sd
This information can be used to analyze data when original values are unknown.
Given that the scores on a test are normally distributed, that the mean score is 80 and the standard deviation is 7,
1. What percent scored less than 87?
2. What percent scored less than 73?
3. What percent scored more than 94?
4. 2.5% scored less than what value?
Given the times required for a group of students to complete the physical fitness obstacle course result in a normal curve, and that the mean time 21 minutes and the standard deviation is 4,
5. What percent took longer than 29 minutes?
6. What percent took less than 29 minutes?
7. What percent took between 13 and 29 minutes?
8. What percent took between 13 and 25 minutes?
9. What percent took longer than 17 minutes?

Answers: 3

Show answers

Other questions on the subject: Advanced Placement (AP)

Advanced Placement (AP), 25.06.2019 06:00, bougiehairstudios

Why did the strike at the pullman plant in chicago become a nationwide strike?

Answers: 1

continue

Advanced Placement (AP), 26.06.2019 16:00, mccdp55

What is an effective way to have children experience classic art? a. schedule a field trip to a museum. b. have children find art on their own. c. make sure that the children know all of the art vocabulary. d. ask children to copy a classic piece.

Answers: 2

continue

Advanced Placement (AP), 27.06.2019 05:00, emilyswinge4421

Most four year colleges look at all the following statistics on a students application except a: standardizes test scores b: iq c: gpa d: class rank

Answers: 1

continue

Advanced Placement (AP), 28.06.2019 00:00, butryn

The graph of x^2=-2+y+5cosy is shown for y=11 a.) find the derivative dy/dx b.)write an equation to the line tangent to the graph of point p. c.)find the y-coordinate of the graph where the line tangent to the graph at that point is vertical pls. show all your work and explain

Answers: 1

continue

You know the right answer?

A study of statistical data reveals that when a normal distribution occurs, 68% of the population wi...