Monday
September 22, 2014

Homework Help: statistics

Posted by Sandra on Sunday, July 28, 2013 at 11:37am.

Can you please tell me how to solve for the following?

Pedro took an exam in a class in which the mean was 64 with a standard deviation of 6. If his z score was +3, what was his exam score?

A students commute to school is normally distributed with a mean of 31 min and a standard deviation of 7 min. What is the probability that the student gets to school in 17 to 31 min?

Are the formulas the same for these?

And last one I need help with this:

Assume a normally distributed set of test scores with a mean of 100 and a standard deviation of 20. Find the probability that a person selected at random will have a score of the following:

a-between 60 and 140
b-less than 60

THANK YOU! I just need to know how to solve please.

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

stats - Relatively speaking, which statistics exam did you do better on? On ...
probability and statistics - Suppose every student in your class got a score of ...
Statistics - In Professor Smith's statistics course, the correlation between ...
statistics - Suppose that the mean score of an exam was 77 when taken 30 ...
statistics - Suppose that the mean score of an exam was 77 when taken 30 ...
Analytical Skills - If your score on a statistics exam was 76 and the professor ...
statistics - say that you have a distribution of exam scores with a mean of 57 ...
statistics - In one history class, 34 students took an exam. The mean of the ...
statistic of behavioral science - for each of the following, identify the exam ...
Statistics - The next three questions refer to the following situation. Data ...

Search
Members