Students should spend average of 12 hours studying.  Survey done on 25 students and the distribution of total study hours per week is bell-shaped with a mean of 12 hours and a standard deviation of 2.7 hours 68% of students spend between ? hours and ? hours on stats each week 95% of students spend between ? hours and ? hours on stats each week. 99.7% of students spend between ? hours and ? hours on stats each week

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 7PPS
icon
Related questions
Topic Video
Question

Students should spend average of 12 hours studying.  Survey done on 25 students and the distribution of total study hours per week is bell-shaped with a mean of 12 hours and a standard deviation of 2.7 hours

68% of students spend between ? hours and ? hours on stats each week

95% of students spend between ? hours and ? hours on stats each week.

99.7% of students spend between ? hours and ? hours on stats each week.

Expert Solution
Step 1

The provided information are:

Statistics homework question answer, step 1, image 1

Step 2

According to the empirical rule:

Approximately 68% of the data values fall within one standard deviation of mean.

Approximately 95% of the data values fall within two standard deviations of mean.

Approximately 99.7% of the data values fall within three standard deviations of mean.

Step 3

(a)

It is known that 68% of the data lies within one standard deviations of the mean.

Statistics homework question answer, step 3, image 1

steps

Step by step

Solved in 5 steps with 4 images

Blurred answer
Knowledge Booster
Hypothesis Tests and Confidence Intervals for Proportions
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, statistics and related others by exploring similar questions and additional content below.
Recommended textbooks for you
Glencoe Algebra 1, Student Edition, 9780079039897…
Glencoe Algebra 1, Student Edition, 9780079039897…
Algebra
ISBN:
9780079039897
Author:
Carter
Publisher:
McGraw Hill