In testing for differences between the means of two independent populations the null hypothesis is: A. HiH,-H2=2 B. HoiH1-H20

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter10: Sequences, Series, And Probability
Section10.8: Probability
Problem 31E
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QUESTION 16
In testing for differences between the
means
of
two
independent
populations the null hypothesis is:
A. HH,-H2=2
B. Ho:H1-H2<0
C. H H,-H2=0
D. HoiH1-H2>0
Transcribed Image Text:QUESTION 16 In testing for differences between the means of two independent populations the null hypothesis is: A. HH,-H2=2 B. Ho:H1-H2<0 C. H H,-H2=0 D. HoiH1-H2>0
QUESTION 20
To compare the wearing of two types of
automobile engines, 1 and 2, an experimenter
chose to "pair" the measurements, comparing
the wear for the two types of engines on each
of 7 automobiles, as shown below. Determine
whether these data are sufficient to infer at
the 10% significance level that the two types
of engines wear differently.
Automobile
Engine 1
Engine 2
1
2
3
4
6
8
15
7
9.
10
13
11
12
18
8
9
12
11
10
The critical value is:
A. 3,707
B. 1.440
C. 3.143
D. 1.943
Transcribed Image Text:QUESTION 20 To compare the wearing of two types of automobile engines, 1 and 2, an experimenter chose to "pair" the measurements, comparing the wear for the two types of engines on each of 7 automobiles, as shown below. Determine whether these data are sufficient to infer at the 10% significance level that the two types of engines wear differently. Automobile Engine 1 Engine 2 1 2 3 4 6 8 15 7 9. 10 13 11 12 18 8 9 12 11 10 The critical value is: A. 3,707 B. 1.440 C. 3.143 D. 1.943
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