Question

Two Sample Hypothesis Test

Show all five steps in your analysis. To get full credit you must label the CV (critical value) and TV (Test Value) in your drawing. Use the p-value for this test.

A teacher claims 9 year old girls are taller than 9 year old boys. Test this claim at an alpha level of .05. A researcher randomly selected a sample of 60 boys and another sample of 50 girls. The statistics from these two samples are shown below: Boys: n = 60, mean = 123.5 cm, and standard deviation = 9.9 cm Girls: n = 50, mean = 126.2, and standard deviation = 10.9 cm

What type of test are you going to perform? ______________________________

Answer #1

A teacher claims 9 year old girls are taller than 9 year old
boys. Test this claim at an alpha level of .05. A researcher
randomly selected a smaple of 60 boys and sample of 50
girls.
Boys: n=60 mean = 123.5 cm standard deviation = 9.9 cm
Girls: n=50 mean = 126.2 cm standard deviation = 10.9 cm
Use either one sample t or z test. Label critical value and test
value. State p value and show all five...

Show all five steps in your analysis. To get full credit you
must label the CV (Critical Value) and TV (Test value) in your
drawing. Use the p-value for making your decision.
A trainer claims that marathon runner’s maximal volume
oxygen uptake is greater than the average athlete. The average
athlete has an average maximal volume oxygen uptake of 37.8 ml/kg.
A random sample of 18 marathon runners has a mean of 41.2 and a
standard deviation of 5.8 ml/kg....

A random sample of 9-year-olds yielded the following results. At
α=0.05, do the data support the claim that there is a difference in
the average heights?
Heights of Boys and Girls
Boys
Girls
Sample size
60
50
Mean height (cm)
123.5
126.2
Population variance
98
120

a researcher claims that the mean head circumference of a two
year old girl is 50 cm. for her study she chose a random sample of
girls with a circumference of 47, 51, 48, 47.5, 49, 50.5, 48.5.
using this sample and that the standard deviation of the sample is
s=1.50, test the researchers claim at a level of significance of
a=0.05
Ho: CV: Test Statistic
H1:

Consider the following hypothesis test: H 0: 50 H a: > 50 A
sample of 60 is used and the population standard deviation is 6.
Use the critical value approach to state your conclusion for each
of the following sample results. Use = .05.
a. With = 52.5, what is the value of the test statistic (to 2
decimals)? Can it be concluded that the population mean is greater
than 50?
b. With = 51, what is the value of...

Consider the following hypothesis test: H 0: 50 H a: > 50 A
sample of 50 is used and the population standard deviation is 9.
Use the critical value approach to state your conclusion for each
of the following sample results. Use = .05.
a. With = 52.5, what is the value of the test statistic (to 2
decimals)? Can it be concluded that the population mean is greater
than 50?
b. With = 51, what is the value of...

Make sure to show all steps to receive full credit, that is: a)
Identify the claim: state the null and alternative hypotheses. b)
Determine the test: left-tailed, right-tailed, or two-tailed. c)
Graph your bell-shaped curve and label your levels of significance
or critical value. d) Find your standardized test statistic ? and
label it on your graph. e) Decide whether to reject or fail to
reject the null hypothesis. f) Interpret your result.
1) A dealership projected that the mean...

Conduct a hypothesis test for each problem, using the
traditional method. Show the 5 steps and all work for each
hypothesis test. Be sure you select the correct test to use for
each problem.
5. A reading group claims that Americans read more as
they grow older. A random sample of 65 Americans age 60 or older
read for a mean length of 63.8 minutes per day, with a population
standard deviation of 15.5 minutes per day. A random sample...

. Hypothesis Test FOR the mean: The test statistic is from your
work on the sample mean (1c, i)
Assume the population parameters of DBP are a mean of 84 and a
standard deviation of 8 for people NOT on Quinapril. Use the value
you calculated for the sample mean of people using Quinapril in
part c of #1, to test the claim that people who use Quinapril have
lower DBP at the 5% level of significance.
the mean is...

Consider the following hypothesis test:
H 0: 50
H a: > 50
A sample of 70 is used and the population standard deviation is
6. Use the critical value approach to state your conclusion for
each of the following sample results. Use = .05.
a. With = 52.5, what is the value of the test
statistic (to 2 decimals)?
Can it be concluded that the population mean is greater than
50?
SelectYesNoItem 2
b. With = 51, what is the value of the test statistic...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 3 minutes ago

asked 4 minutes ago

asked 5 minutes ago

asked 16 minutes ago

asked 17 minutes ago

asked 27 minutes ago

asked 31 minutes ago

asked 31 minutes ago

asked 32 minutes ago

asked 37 minutes ago

asked 52 minutes ago

asked 55 minutes ago