# Question: In a random sample of 150 community college students the

In a random sample of 150 community college students, the mean number of hours spent studying per week is 11.7 hours and the standard deviation is 4 hours.

a) Find the standard score (z-score) for students who study the following hours in a particular week. Round Z to the nearest hundredth and interpret the meaning of each answer as it pertains to this problem.

b) Assuming the distribution of the number of hours community college students study per week is normally distributed, approximately how many of the students in the sample study between 7.7 and 15.7 hours per week?

c) Assuming the distribution of the number of hours community college students study per week is normally distributed, approximately how many of the students in the sample study less than 3.7 hours per week?

d) Without assuming anything about the distribution of the number of hours community college students study per week, at least what percentage (approximately) of the students study between 5.3 and 18.1 hours per week?

e) Without assuming anything about the distribution of the number of hours community college students study per week, at most what percentage of the students study less than 3.7 hours or more than 19.7 hours per week?

a) Find the standard score (z-score) for students who study the following hours in a particular week. Round Z to the nearest hundredth and interpret the meaning of each answer as it pertains to this problem.

b) Assuming the distribution of the number of hours community college students study per week is normally distributed, approximately how many of the students in the sample study between 7.7 and 15.7 hours per week?

c) Assuming the distribution of the number of hours community college students study per week is normally distributed, approximately how many of the students in the sample study less than 3.7 hours per week?

d) Without assuming anything about the distribution of the number of hours community college students study per week, at least what percentage (approximately) of the students study between 5.3 and 18.1 hours per week?

e) Without assuming anything about the distribution of the number of hours community college students study per week, at most what percentage of the students study less than 3.7 hours or more than 19.7 hours per week?

**View Solution:**## Answer to relevant Questions

Almond vs. dark chocolate A statistics student wondered whether the color distribution for Almond M&M's candies is the same as for Dark Chocolate Peanut M&M's. She collected several packages of each type and recorded the ...Following are selected financial data in thousands of dollars for the Hunter Corporation.2012 2011 Current Assets....... $500 $400Fixed Assets, net...... 700 600 Total Assets........ 1,200 1,000Current ...List the five stages of the industry life cycle. How does the pattern of cash dividend payments change over the cycle? (A general statement is all that is required.)You purchase a truck on 1-1-x1 for $55,000. Salvage value is $5,000 and the life of the truck is 5 years. Fill in the chart below using straight line depreciation.a. Prepare the necessary journal entry needed on ...Refer to Note 1. Segmental Information on page 16 of Air New Zealand 2012 Annual Report. In what geographical segments did Air New Zealand operate in 2012? Briefly explain how investors and analysts could use the information ...Post your question