Question

Suppose that you want to test whether the population proportion of attorneys who make at least $400,000 per year is less than 0.24. A random sample of 200 attorneys shows that there are 36 of them who make at least $400,000 a year.

What is your conclusion from a hypothesis test at a 10% significance level?

Fail to reject H |
||

Reject H |
||

Fail to reject H |
||

Reject H |

Answer #1

In order to conduct a hypothesis test for the population
proportion, you sample 450 observations that result in 189
successes. (You may find it useful to reference the appropriate
table: z table or t table) H0: p ≥ 0.45; HA: p < 0.45. a-1.
Calculate the value of the test statistic. (Negative value should
be indicated by a minus sign. Round intermediate calculations to at
least 4 decimal places and final answer to 2 decimal places.) a-2.
Find the p-value....

n order to conduct a hypothesis test for the population
proportion, you sample 290 observations that result in 87
successes. (You may find it useful to reference the appropriate
table: z table or t table) H0: p ≥ 0.35; HA: p < 0.35.
a-1. Calculate the value of the test statistic. (Negative value
should be indicated by a minus sign. Round intermediate
calculations to at least 4 decimal places and final answer to 2
decimal places.)
a-2. Find the p-value....

1.
Test the claim that the proportion of men who own cats is
significantly different than the proportion of women who own cats
at the 0.1 significance level.
The null and alternative hypothesis would be:
H0:pM≤pFH0:pM≤pF
H1:pM>pFH1:pM>pF
H0:pM≥pFH0:pM≥pF
H1:pM<pFH1:pM<pF
H0:μM=μFH0:μM=μF
H1:μM≠μFH1:μM≠μF
H0:μM≤μFH0:μM≤μF
H1:μM>μFH1:μM>μF
H0:pM=pFH0:pM=pF
H1:pM≠pFH1:pM≠pF
H0:μM≥μFH0:μM≥μF
H1:μM<μFH1:μM<μF
The test is
left-tailed
two-tailed
right-tailed
Based on a sample of 60 men, 40% owned cats
Based on a sample of 40 women, 50% owned cats
positive Critical Value =
[three decimal accuracy]...

You are conducting a study to see if the proportion of women
over 40 who regularly have mammograms is significantly less than
0.24. You use a significance level of ?=0.05.
H0:p=0.24
H1:p<0.24
You obtain a sample of size n=536 in which there are 123
successes.
What is the p-value for this sample? (Report answer accurate to
four decimal places.)
p-value =
The p-value is...
less than (or equal to) ?? or greater than ??
This p-value leads to a decision...

Suppose you want to use the Kruskal-Wallis H-test to compare
the probability distributions of three populations. The following
data represent independent random samples selected from the three
populations. Use this data to complete parts a through d below.
I
II
III
36
22 72
54
20 101
63
78 89
56
40 25
84
36 81
71
42 76
46
34
a. What type of experimental design was used?
A. Paired Difference
B. Completely Randomized.
C. Randomized Block
b.
Specify...

Let the random variable p indicate the population
proportion of people who plan to vote for Donald Trump in the
upcoming election. In a sample of 50 people, you find the sample
proportion of people who plan to vote for Donald Trump
is p ^ = .45.
Construct a 95% confidence interval for p, the true
proportion of people who plan to vote for Donald Trump.
You want to test the hypothesis that the population proportion
of people who will vote...

Test the claim that the proportion of men who own cats is
smaller than the proportion of women who own cats at the .01
significance level.
The null and alternative hypothesis would be:
H0:μM=μF
H1:μM≠μF
H0:pM=pF
H1:pM>pF
H0:μM=μF
H1:μM<μF
H0:μM=μF
H1:μM>μF
H0:pM=pF
H1:pM<pF
H0:pM=pF
H1:pM≠pF
The test is:
left-tailed
two-tailed
right-tailed
Based on a sample of 60 men, 40% owned cats
Based on a sample of 40 women, 50% owned cats
The test statistic is: (to 2 decimals)
The p-value is: (to...

Suppose you want to test H0: u
<=100 against H1: u>
100 using a significance level of 0.05. The population is normally
distributed with a standard deviation of 75. A random sample size
of n = 40 will be used. If u = 130, what
is the probability of correctly rejecting a false null hypothesis?
What is the probability that the test will incorrectly fail to
reject a false null hypothesis?

1.
Test the hypothesis:
Population appears to be normally distributed.
Given the sample statistics n = 20, = 8.2, and s = 1.2,
find the critical value(s) tcr and
test statistic t for testing the claim μ = 8.6 at
significance α = 10%.
Then, state the conclusion of this hypothesis test.
Select one:
tcr = 1.729, t ≈ 1.491, fail to reject
H0
tcr = 1.328, t ≈ 1.491, reject H0
tcr = −1.328, t ≈ −1.491, reject H0
tcr...

You wish to test the following claim a significance level of α =
0.05 . H o : p = 0.24 H a : p < 0.24 You obtain a sample of size
n = 160 in which there are 26 successful observations. What is the
test statistic for this sample? test statistic = Round to 3 decimal
places. What is the p-value for this sample? P-value = Use
Technology Round to 4 decimal places. The p-value is... less than...

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