Student Solutions Manual for Devore's Probability and Statistics for Engineering and the Sciences, 9th
9th Edition
ISBN: 9798214004020
Author: Jay L. Devore
Publisher: Cengage Learning US
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Chapter 7.2, Problem 17E
Exercise 1.13 gave a sample of ultimate tensile strength observations (ksi). Use the accompanying
| N | TrMean | StDev | SE Mean | ||
| 153 | 135.39 | 135.40 | 135.41 | 4.59 | 0.37 |
| Minimum | Maximum | Q1 | Q3 |
| 122.20 | 147.70 | 132.95 | 138.25 |
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People with high blood pressure suffer from hypertension. Data on fasting blood sugar (milligrams/deciliter) and magnesium (milligrams/deciliter) in blood specimens collected from 50 patients diagnosed with hypertension were collected. The accompanying technology printout gives 95% confidence intervals for the mean
fasting blood sugar (FBS) and mean magnesium level (MAG). Use this information to complete parts a through d below.
Variable
Mean
StDev
SE Mean
958 CI
FBS
50
104.99
37.05
5.24
94.47,
115.51 )
MAG
50
1.83173
0.05298
0.00749
( 1.8166B,
1.84678)
a. Locate and interpret the 95% confidence interval for mean fasting blood sugar on the printout.
(Type integers or decimals. Do not round.)
O A. The 95% confidence interval for mean fasting blood sugar indicates that the mean fasting blood sugar level will be between
and
milligrams per deciliter in 95% of similarly constructed samples.
B. The 95% confidence interval for mean fasting blood sugar indicates that the true mean fasting…
A study was carried out to compare the mean compressive strength of two types of concrete. 10 samples of each type of concrete were collected. Data (in psi) are presented in the next table.
(The data table is in the picture)
Assuming normality, determine a 95% confidence interval for the difference of the stockings and interpret it.
Note: Solve what is requested step by step in order to arrive at the answer, do not skip steps.
Chapter 7 Solutions
Student Solutions Manual for Devore's Probability and Statistics for Engineering and the Sciences, 9th
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