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Music and memory Is it a good idea to listen to music when
Chapter 5, Problem 47E(choose chapter or problem)
Cholesterol Assume the cholesterol levels of adult American women can be described by a Normal model with a mean of 196 mg/dL and a standard deviation of 27.
a) Draw and label the Normal model.
b) What percent of adult women do you expect to have cholesterol levels over 200 mg/dL?
c) What percent of adult women do you expect to have cholesterol levels between 170 and 180 mg/dL?
d) Estimate the IQR of the cholesterol levels. e) Above what value are the highest 15% of women’s cholesterol levels?
Questions & Answers
QUESTION:
Cholesterol Assume the cholesterol levels of adult American women can be described by a Normal model with a mean of 196 mg/dL and a standard deviation of 27.
a) Draw and label the Normal model.
b) What percent of adult women do you expect to have cholesterol levels over 200 mg/dL?
c) What percent of adult women do you expect to have cholesterol levels between 170 and 180 mg/dL?
d) Estimate the IQR of the cholesterol levels. e) Above what value are the highest 15% of women’s cholesterol levels?
ANSWER:Problem 47E
Music and memory Is it a good idea to listen to music when studying for a big test? In a study conducted by some Statistics students, 62 people were randomly assigned to listen to rap music, Mozart, or no music while attempting to memorize objects pictured on a page. They were then asked to list all the objects they could remember. Here are the 5-number summaries for each group:
a) Describe the W’s for these data: Who, What, Where, Why, When, How.
b) Name the variables and classify each as categorical or quantitative.
c) Create parallel boxplots as best you can from these summary statistics to display these results.
d) Write a few sentences comparing the performances of the three groups.
Step by Step Solution
Step 1 of 5
Given:
The sample number of people randomly selected is .
People are assigned to listen to rap music, Mozart, or no music while attempting to memorize objects pictured on a page.
The 5-number summary is as follows,
|
n |
Min |
Q1 |
Median |
Q3 |
Max |
Rap |
29 |
5 |
8 |
10 |
12 |
25 |
Mozart |
20 |
4 |
7 |
10 |
12 |
27 |
None |
13 |
8 |
9.5 |
13 |
17 |
24 |