Question

Which of the following is NOT a step in hypothesis testing? Select one: a. Find the confidence interval. b. Use the level of significance and the critical value approach to determine the critical value of the test statistic c. Formulate the null and alternative hypotheses d. Use the rejection rule to solve for the value of the sample mean corresponding to the critical value of the test statistic. When population standard deviation (σ) is unknown, we use sample standard deviation (s) to estimate σ.

Then the margin of error, the interval estimate for the population and hypothesis test are based on a probability distribution known as the Select one: a. t-distribution. b. z-distribution. c. degrees of freedom. d. both z and t distribution.

Answer #1

Answer: Which of the following is NOT a step in hypothesis testing?

Solution:

The option a) is correct answer.

Find the confidence interval is NOT a step in hypothesis testing.

Accept option a) all are the steps involved in hypothesis testing.

Answer: When population standard deviation (σ) is unknown, we use sample standard deviation (s) to estimate σ.

Then the margin of error, the interval estimate for the
population and hypothesis test are based on a probability
distribution known as **t-distribution.**

The option a) is correct answer.

If this answer is helpful please upvote.

In Chapters 7 and 8, you studied estimation and hypothesis
testing.
(a) What two sampling distributions are used in estimation and
hypothesis testing of population means, proportions, paired
differences, differences of means, and differences of proportions?
(Select all that apply.)
the Student's z distribution
the standard t distribution
the standard normal distribution
the standard Student's distribution
the Student's t distribution
What are the criteria for determining the appropriate sampling
distribution? (Select all that apply.)
known or unknown σ
known or...

1.
if You are testing a hypothesis about a population proportion and a
sample size is over 100 what is the proper test statistic to use?
A) z statstic
B) chi-square
c) t statistic
d) not enough data
2. If you are using the critical value approach to do a single
tailed hypothesis test on the population mean, what impact will a
smaller standard error have on the critical value of your test
statistic?
A) critical value will increae
b)...

Part 1: Find the standardized test statistic
for testing a claim H0: μ ≤ 26.8 at significance α =
0.05 given a sample with n = 36 and = 28.7, if the
population is normally distributed and σ = 10.30.
Round your answer to three decimal places.
Part 2:To complete the hypothesis test from the previous
question, we need to compare the calculated test statistic against
the critical value _______
Select one:
t = 1.690
z = −1.645
z = 1.645...

For the standard normal distribution, compute Z0.69.
Use Excel and round the answer to two decimal places.
Consider the following test performed with the level of
significance 0.01: A random sample of size 28 is obtained from a
normally distributed population. The population standard deviation
is equal to 3.6. The sample mean happened to be 24. For this
hypothesis test, what will be the critical value (the relevant
z-alpha)? Round the answer to three decimal
places.
A probability distribution of all...

10. For a particular scenario, we wish to test the hypothesis
H0 : p = 0.52. For a sample of size
50, the sample proportion p̂ is 0.42. Compute the value of
the test statistic zobs. (Express your answer
as a decimal rounded to two decimal places.)
4. For a hypothesis test of
H0 : μ = 8
vs.
H0 : μ > 8,
the sample mean of the data is computed to be 8.24. The
population standard deviation is...

Consider the following hypothesis test for the mean of a
normally distributed population: Ho:
μ=80. A random sample of size 40 is to be taken. The
population standard deviation is 20. Write the rejection rule using
critical value method; use α=4%. Please clearly identify
the test-statistic (t or z or F etc).

Consider the following hypothesis test for the mean of a
normally distributed population: Ho: μ=80. A random sample of size
40 is to be taken. The population standard deviation is 20. Write
the rejection rule using critical value method; use α=4%. Please
clearly identify the test-statistic (t or z or F etc).

Answer the following about T-Test & T-distributions:
1. Which of the following statements related to the
t-distribution is not true?
Select one:
a. Since the population standard deviation is usually unknown,
the standard error of the sample mean is estimated using the sample
standard deviation as an estimator for the population standard
deviation. The formula is s/sqrt(n).
b. The population must be t-distributed in order to use the
t-distribution.
c. Like the Normal distribution, the t-distribution is symmetric
and unimodal....

1. In testing a null hypothesis H0 versus an alternative Ha, H0
is ALWAYS rejected if
A. at least one sample observation falls in the non-rejection
region.
B. the test statistic value is less than the critical value.
C. p-value ≥ α where α is the level of significance. 1
D. p-value < α where α is the level of significance.
2. In testing a null hypothesis H0 : µ = 0 vs H0 : µ > 0,
suppose Z...

Hypothesis testing is the basis of inferential statistics.
Statisticians are always coming up with new tests and testing new
characteristics of population parameters. One of the simplest tests
that currently exist is the one-sample test for means.
A random sample is drawn. If the population variance is known,
then we use the Z test; if the population variance is unknown, we
use the T test. In addition, there are some additional assumptions
that can be made. For example, if a...

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