Problem 7For each exercise perform each of the ear steps assume that all variables are normally or approximately normally distributed. Exercises 9-3For these exercises, perform each of these steps. Assumethat all variables are normally or approximately normallythUdistributed.a. State the hypotheses and identify the claim.b. Find the critical value(s) or use the P-value method.c. Compute the test value.d. Make the decision.e. Summarize the results.6.Use the traditional method of hypothesis testing unlessthe P-value method is specified by your instructor. Assumethe variances are unequal.1. Waterfall Heights Is there a significant differenceat a = 0.10 in the mean heights in feet of waterfalls inEurope and the ones in Asia? The data are shown.EuropeAsia48712461385614722964470131298411373208309003458203507221904Source: World Almanac and Book of Facts.2. Tax-Exempt Properties A tax collector wishes to seeif the mean values of the tax-exempt properties are dif-ferent for two cities. The values of the tax-exempt prop-erties for the two random samples are shown. The dataare given in millions of dollars. At a = 0.05, is thereenough evidence to support the tax collector's claim%3Dnt? weights are different?Hard body typesSoft body types21171720241311131617152012152316171713151618187. Weights of Running Shoes The weights in ounces of asample of running shoes for men and women are shown.Test the claim that the means are different. Use theP-value method with a = 0.05.MenWomen10.412.610.610.28.811.114.79.69.59.59.39.510.812.910.111.211.713.39.410.312.814.59.810.311.08. Teacher Salaries A researcher claims that the meanof the salaries of elementary school teachers is greaterthan the mean of the salaries of secondary school teach-ers in a large school district. The mean of the salariesof a random sample of 26 elementary school teachers is$48,256, and the sample standard deviation is $3,912.40.The mean of the salaries of a random sample of 24 sec-ondary school teachers is $45,633. The sample standarddeviation is $5533. At a =0.05, can it be concluded thatthe mean of the salaries of the elementary school teachersof the salaries of the secondary

7. The following hypothesis can be formed H0: μM=μWHA: μM≠μW The Test statistic is given as…

Answered: 7. Weights of Running Shoes The weights…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Problem 7 For each exercise perform each of the ear steps assume that all variables are normally or approximately normally distributed.

Exercises 9-3
For these exercises, perform each of these steps. Assume
that all variables are normally or approximately normally
th
U
distributed.
a. State the hypotheses and identify the claim.
b. Find the critical value(s) or use the P-value method.
c. Compute the test value.
d. Make the decision.
e. Summarize the results.
6.
Use the traditional method of hypothesis testing unless
the P-value method is specified by your instructor. Assume
the variances are unequal.
1. Waterfall Heights Is there a significant difference
at a = 0.10 in the mean heights in feet of waterfalls in
Europe and the ones in Asia? The data are shown.
Europe
Asia
487
1246
1385
614
722
964
470
1312
984
1137
320
830
900
345
820
350
722
1904
Source: World Almanac and Book of Facts.
2. Tax-Exempt Properties A tax collector wishes to see
if the mean values of the tax-exempt properties are dif-
ferent for two cities. The values of the tax-exempt prop-
erties for the two random samples are shown. The data
are given in millions of dollars. At a = 0.05, is there
enough evidence to support the tax collector's claim
%3D
nt?

weights are different?
Hard body types
Soft body types
21
17
17
20
24
13
11
13
16
17
15
20
12
15
23
16
17
17
13
15
16
18
18
7. Weights of Running Shoes The weights in ounces of a
sample of running shoes for men and women are shown.
Test the claim that the means are different. Use the
P-value method with a = 0.05.
Men
Women
10.4
12.6
10.6
10.2
8.8
11.1
14.7
9.6
9.5
9.5
9.3
9.5
10.8
12.9
10.1
11.2
11.7
13.3
9.4
10.3
12.8
14.5
9.8
10.3
11.0
8. Teacher Salaries A researcher claims that the mean
of the salaries of elementary school teachers is greater
than the mean of the salaries of secondary school teach-
ers in a large school district. The mean of the salaries
of a random sample of 26 elementary school teachers is
$48,256, and the sample standard deviation is $3,912.40.
The mean of the salaries of a random sample of 24 sec-
ondary school teachers is $45,633. The sample standard
deviation is $5533. At a =
0.05, can it be concluded that
the mean of the salaries of the elementary school teachers
of the salaries of the secondary

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

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