Question

Assume that statistics scores that are normally distributed with a mean 75 and a standard deviation...

Assume that statistics scores that are normally distributed with a mean 75 and a standard deviation of 4.8 (a) Find the probability that a randomly selected student has a score greater than 72. (b) Find the probability that a randomly selected student has a score between 70 and 80. (c) Find the statistics score separating the bottom 99.5% from the top 0.5%. (d) Find the statistics score separating the top 64.8% from the others.

Homework Answers

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Scores of students in a large Statistics class are normally distributed with a mean of 75...
Scores of students in a large Statistics class are normally distributed with a mean of 75 points and a standard deviation of 5 points. Find the probability that a student scores more than 80 points If 100 students are picked at random, how many do you expect to score below 70 points? If top 10% of students obtain an A grade, how much should a student obtain to get an A grade. Suppose four students are picked at random, find...
Assume that adults have IQ scores that are normally distributed with a mean 105 and standard...
Assume that adults have IQ scores that are normally distributed with a mean 105 and standard deviation of 20. a. Find the probability that a randomly selected adult has an IQ less than 120. b. Find P90 , which is the IQ score separating the bottom 90% from the top 10%. show work
A) Assume that adults have IQ scores that are normally distributed with a mean of 100...
A) Assume that adults have IQ scores that are normally distributed with a mean of 100 and a standard deviation of 15. Find the probability that a randomly selected adult has an IQ between 90 and 120. (Provide graphing calculator sequence) B) Assume that adults have IQ scores that are normally distributed with a mean of 100 and a standard of 15. Find P3D, which is the IQ score separating the bottom 30% from the top 70%. (Provide graphing calculator...
Scores on exam 2 for statistics are normally distributed with mean 70 and standard deviation 15....
Scores on exam 2 for statistics are normally distributed with mean 70 and standard deviation 15. a. Find a, if P(x>a)= 0.9595 b.What is the probability that a randomly selected score is above 65?
The average on a statistics test was 75 with a standard deviation of 11. If the...
The average on a statistics test was 75 with a standard deviation of 11. If the test scores are normally distributed, find the probability that the mean score of 36 randomly selected students is between 72 and 81.
Scores of students in a large Statistics class test are normally distributed with a mean of...
Scores of students in a large Statistics class test are normally distributed with a mean of 75 points and a standard deviation of 5 points.Find the probability that a student scores more than 80 pointsIf 100 students are picked at random, how many do you expect to score below 70 points?If top 10% of students obtain an A grade, how much should a student obtain to get an A grade.Suppose four students are picked at random, find the probability that...
The average on a statistics test was 75 with a standard deviation of 11. If the...
The average on a statistics test was 75 with a standard deviation of 11. If the test scores are normally distributed, find the probability that the mean score of 25 randomly selected students is between greater than 82.
Student scores on the Stats final exam are normally distributed with a mean of 75 and...
Student scores on the Stats final exam are normally distributed with a mean of 75 and a standard deviation of 6.5 Find the probability of the following: (use 4 decimal places) a.) The probability that one student chosen at random scores above an 80. b.) The probability that 10 students chosen at random have a mean score above an 80. c.) The probability that one student chosen at random scores between a 70 and an 80. d.) The probability that...
2. The average on a statistics test was 75 with a standard deviation of 11. If...
2. The average on a statistics test was 75 with a standard deviation of 11. If the test scores are normally distributed, find the probability that the mean score of 36 randomly selected students is between greater than 81. *
Assume that adults have IQ scores that are normally distributed with a mean of 96.3 and...
Assume that adults have IQ scores that are normally distributed with a mean of 96.3 and a standard deviation 23.1 Find the first quartile ​, which is the IQ score separating the bottom​ 25% from the top​ 75%. (Hint: Draw a​ graph.)