Question

(1 point) Test the claim that the population of sophomore
college students has a mean grade point average of 2.252.25 versus
a mean grade point average greater than 2.252.25. Sample statistics
include n=23, x¯=2.4, and s=0.8. Use a significance level of
α=0.01.

The test statistic is

The critical value is

The final conclusion is

**A.** There is not sufficient evidence to support the
claim that the mean grade point average is greater than 2.25.

**B.** There is sufficient evidence to support the
claim that the mean grade point average is greater than 2.25.

Answer #1

a) Test statistic

= 0.90

b) Critical value = t_{0.01,22} = 2.508

c) Since test statistic is not more than critical value, we should not reject the null hypothesis.

Option-A) There is not sufficient evidence to support the claim that the mean grade point average is greater than 2.25.

Test the claim that the population of sophomore college students
has a mean grade point average of 2.24versus a mean grade point
average greater than 2.24. Sample statistics include n=23,
x⎯⎯⎯=2.4, and s=0.6. Use a significance level of α=0.01.
The test statistic is
The critical value is

Test the claim that the population of sophomore college students
has a mean grade point average greater than 2.25. Sample statistics
include n=180, xtopbar =2.43, and s=0.8. Use a significance level
of α=0.05.
The test statistic is=
The critical value is=
The P-Value is=

The dean of students affairs at a college wants to test the
claim that 40 % of all undergraduate students reside in the college
dormitories. If 57 out of 69 randomly selected undergraduate
students reside in the dormitories, does this support dean's claim
with α = 0.05 ?
Test statistic:
Critical Value:
Do we accept or reject Dean's claim?
A. Reject Dean's claim that 40 % of undergraduatute students
live in dormitories.
B. There is not sufficient evidence to reject...

Test the claim that for the population of statistics final
exams, the mean score is 80 using alternative hypothesis that the
mean score is different from 80. Sample statistics include n=28,
x¯=81, and s=13. Use a significance level of α=0.05. (Assume
normally distributed population.)
The test statistic is
The positive critical value is
The negative critical value is
The conclusion is A.There is sufficient evidence to reject the
claim that the mean score is equal to 80.
B.There is not...

Test the claim that for the population of statistics final
exams, the mean score is 70 using alternative hypothesis that the
mean score is different from 70. Sample statistics include
n=20,x¯=71, and s=15. Use a significance level of α=0.05. (Assume
normally distributed population.)
The test statistic is
The positive critical value is
The negative critical value is
The conclusion is
A. There is sufficient evidence to reject the
claim that the mean score is equal to 70.
B. There is...

You wish to test the following claim (H1) at a significance
level of α=0.01.
Ho:μ=82.6
H1:μ>82.6
You believe the population is normally distributed, but you do not
know the standard deviation. You obtain the following sample of
data:
data
84.2
79.3
95
87.8
81.6
86.2
82.9
112.6
102.1
85
96.7
67.3
What is the critical value for this test? (Report answer accurate
to three decimal places.)
critical value =
What is the test statistic for this sample? (Report answer accurate...

You wish to test the following claim (HaHa) at a significance
level of α=0.01α=0.01.
Ho:μ=57.9Ho:μ=57.9
Ha:μ>57.9Ha:μ>57.9
You believe the population is normally distributed, but you do not
know the standard deviation. You obtain a sample of size n=52n=52
with a mean of M=60.1M=60.1 and a standard deviation of
SD=10.7SD=10.7.
What is the critical value for this test? (Report answer accurate
to three decimal places.)
critical value =
What is the test statistic for this sample? (Report answer accurate
to three...

You wish to test the following claim (HaHa) at a significance
level of α=0.01α=0.01.
Ho:μ=72.8Ho:μ=72.8
Ha:μ>72.8Ha:μ>72.8
You believe the population is normally distributed and you know the
standard deviation is σ=5.8σ=5.8. You obtain a sample mean of
M=74.8M=74.8 for a sample of size n=46n=46.
What is the critical value for this test? (Report answer accurate
to three decimal places.)
critical value =
What is the test statistic for this sample? (Report answer accurate
to three decimal places.)
test statistic =...

You wish to test the following claim ( H 1 ) at a significance
level of α = 0.005 . H o : p = 0.15 H 1 : p > 0.15 You obtain a
sample of size n = 412 in which there are 85 successful
observations. What is the critical value for this test? (Report
answer accurate to three decimal places.) critical value = What is
the test statistic for this sample? (Report answer accurate to
three decimal...

You wish to test the following claim ( H a ) at a significance
level of α = 0.02 . H o : μ = 59.2 H a : μ > 59.2 You believe
the population is normally distributed and you know the standard
deviation is σ = 7.3 . You obtain a sample mean of M = 61.6 for a
sample of size n = 50 .
What is the critical value for this test? (Report answer
accurate to...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 13 minutes ago

asked 15 minutes ago

asked 34 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago