Question

The National Center for Health Statistics reports that the mean systolic blood pressure for males 35 to 44 years of age is 128. Do the executives of a large company have a different mean blood pressure? We collect data on 72 executives and find x-bar=126.07 and s=15. For this test, we plan to use a significance level of 0.05.

1. Using a calculator, conduct the appropriate hypothesis test. Based on the p-value found throught the test, make a decision and interpret the results in context.

2. If you made an error with your decision what type of error could you have made? What would this mean in context?

3. Explain the power of this test in context

Answer #1

The National Center for Health Statistics reports that the mean
systolic blood pressure for males 35 to 44 years of age is 128. Do
the executives of a large company have a different mean blood
pressure? We collect data on 72 executives and find x-bar=126.07
and s=15. For this test, we plan to use a significance level of
0.05.
1. Using a calculator, conduct the appropriate hypothesis test.
Report the p-value.
2. Based on the p-value found in the previous...

The National Center for health statistics reports that the
systolic blood pressure for males 35 to 44 years of age has mean
128. The medical director of a large company looks at the medical
records of 72 executives in this age group and finds that the mean
systolic blood pressure in this sample is ?̄ = 126.07 and standard
deviation is S=15.
a) State the null and alternative hypotheses you would use to
test whether the company’s executives have less...

1. The National Center for Health Statistics reports that the
systolic blood pressure for males (35-44 years of age) has a mean
128 and standard deviation 15. The medical director of a large
company looks at the medical records of 105 executives in same age
group and finds that the mean systolic blood pressure in this
sample is 126.30. At 95% level, is this evidence that the company’s
executives have a lower mean systolic blood pressure than the
general population?

The National Center for Health Statistics reports that
the mean systolic blood pressure for all females aged 45 to 54
years is 130 with a population standard deviation of 9. A
researcher randomly samples 64 female executives aged 45 to 54
years and determines their mean systolic blood pressure to be 132.
Using this sample result, conduct a hypothesis test to determine if
the researcher can conclude that female executives aged 45 to 54
years have a higher mean systolic...

The systolic blood pressure (given in millimeters) of males has
an approximately normal distribution with mean 123 and standard
deviation 12. Systolic blood pressure for males follows a normal
distribution. The bottom 7% of men have systolic blood pressures
below what value?

A doctor hypothesizes that females have higher systolic blood
pressure than males. The doctor obtains the blood pressure from a
sample of patients during their annual check-up. Below is the
systolic blood pressure for the sample. What can be concluded with
α = 0.05?
male
female
106
119
98
105
100
132
109
113
98
105
137
105
119
115
127
122
131
124
111
136
a) What is the appropriate test statistic?
---Select--- na z-test One-Sample t-test Independent-Samples t-test...

Application Exercise:
A physician hypothesizes that males have higher systolic blood
pressure than females. The physician obtains a sample of patients
and measures their blood pressures during their regular check-up.
Below is the systolic blood pressure for the sample. What can the
physician conclude with α = 0.01?
male
female
106
119
98
105
100
132
109
113
98
105
137
115
119
115
127
122
131
124
111
136
a) What is the appropriate test statistic?
---Select--- na z-test...

One with a systolic blood pressure greater than 129 is
considered to have high blood pressure. A study recorded the
systolic blood pressures of 14 randomly selected Americans, which
yielded a mean of 131.57 with standard deviation 15.88. Conduct a
hypothesis test to see if you can say that Americans, on average,
have high blood pressure. 1.Write the hypotheses for this test.
2.What is the test statistic? 3.What is the p-value? 4.Using α =
0.05, decide whether or not to...

One with a systolic blood pressure greater than 129 is
considered to have high blood pressure. A study recorded the
systolic blood pressures of 14 randomly selected Americans, which
yielded a mean of 131.57 with standard deviation 15.88. Conduct a
hypothesis test to see if you can say that Americans, on average,
have high blood pressure.
A. Write the hypotheses for this test.
B. What is the test statistic?
C. What is the p-value?
D. Using α = 0.05, decide...

The systolic blood pressure (given in millimeters) of males has
an approximately normal distribution with mean μ = 135 and standard
deviation σ = 12.
(a) Calculate the z-scores for the male systolic blood pressures
130 and 140 millimeters. (Round your answers to two decimal
places.)
130
mm
z
=
140
mm
z
=
(b) If a male friend of yours said he thought his systolic blood
pressure was 2.5 standard deviations below the mean, but that he
believed his...

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