Question

We wish to test the hypothesis that the population mean is 3.5. From a sample of 4 observations we find that the mean and variance are 1.4 and 1.5, respectively. The p-value for the hypothesis test is approximately:

Answer #1

In order to conduct a hypothesis test for the population mean, a
random sample of 28 observations is drawn from a normally
distributed population. The resulting sample mean and sample
standard deviation are calculated as 17.9 and 1.5, respectively.
(You may find it useful to reference the appropriate
table: z table or t
table).
H0: μ ≤ 17.5 against
HA: μ > 17.5
a-1. Calculate the value of the test statistic.
(Round all intermediate calculations to at least 4 decimal...

In order to conduct a hypothesis test for the population mean, a
random sample of 24 observations is drawn from a normally
distributed population. The resulting sample mean and sample
standard deviation are calculated as 13.9 and 1.6, respectively.
(You may find it useful to reference the appropriate
table: z table or t
table).
H0: μ ≤ 13.0 against
HA: μ > 13.0
a-1. Calculate the value of the test statistic.
(Round all intermediate calculations to at least 4 decimal...

In order to conduct a hypothesis test for the population mean, a
random sample of 24 observations is drawn from a normally
distributed population. The resulting sample mean and sample
standard deviation are calculated as 4.8 and 0.8, respectively.
(You may find it useful to reference the appropriate
table: z table or t
table)
H0: μ ≤ 4.5 against
HA: μ > 4.5
a-1. Calculate the value of the
test statistic. (Round all intermediate calculations to at
least 4 decimal...

In order to conduct a hypothesis test for the population mean, a
random sample of 20 observations is drawn from a normally
distributed population. The resulting sample mean and sample
standard deviation are calculated as 10.5 and 2.2, respectively.
(You may find it useful to reference the appropriate table: z table
or t table).
H0: μ ≤ 9.6 against HA: μ > 9.6
a-1. Calculate the value of the test statistic. (Round all
intermediate calculations to at least 4 decimal...

In 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)
a1) H0: p ≥ 0.36; HA: p < 0.36. a-1. Calculate the
value of the test statistic.
Test statistic:
a2) Find the p-value
a. p-value 0.10
b. p-value < 0.01
c. 0.025 p-value < 0.05
d. 0.05 p-value < 0.10
a-4 Interpret the results at αα = 0.01...

Suppose that we want to test the null hypothesis that the mean
of population 1 is equal to the mean of population 2. We select a
random sample from population 1 and a random sample from population
2, and these two samples are independent. Circle the FALSE
statement.
A. We need to perform a two-sided test.
B. If we know the variance of each population, even if they are
different, we can use the Z test. That is, the test...

Hypothesis Test for a Population Mean (σσ is
Unknown)
You wish to test the following claim (HaHa) at a significance level
of α=0.10α=0.10.
Ho:μ=77.2Ho:μ=77.2
Ha:μ≠77.2Ha:μ≠77.2
You believe the population is normally distributed, but you do not
know the standard deviation. You obtain a sample of size n=83n=83
with mean M=78.9M=78.9 and a standard deviation of
SD=13.7SD=13.7.
What is the test statistic for this sample? (Report answer accurate
to three decimal places.)
test statistic =
What is the p-value for this...

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...

A random sample of 49 measurements from one population had a
sample mean of 16, with sample standard deviation 3. An independent
random sample of 64 measurements from a second population had a
sample mean of 18, with sample standard deviation 4. Test the claim
that the population means are different. Use level of significance
0.01.
(a) What distribution does the sample test statistic follow?
Explain.
The Student's t. We assume that both population
distributions are approximately normal with known...

Assume that the population variance is unknown. We test the
hypothesis that Ho: µ=5 against the one-sided alternative H1: µ≠5
at a level of significance of 5% and with a sample size of n=30. We
calculate a test statistic = -1.699. The p-value of this hypothesis
test is approximately ？ %. Write your answer in percent form. In
other words, write 5% as 5.0.

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 7 minutes ago

asked 11 minutes ago

asked 28 minutes ago

asked 33 minutes ago

asked 33 minutes ago

asked 36 minutes ago

asked 50 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago