Question

Resting pulse rate is an important measure of the fitness of a person's cardiovascular system with a lower rate indicative of greater fitness. The mean pulse rate for all adult males is approximately 72 beats per minute. A random sample of 15 male students was selected and the mean resting pulse rate was found to be 80 beats per minute with a standard deviation of 20 beats per minute. The experimenter wishes to test if the students are less fit, on average, than the general population. Which of the following is accurate?

Select one:

a. This sample is too small to use for statistical inference.

b. Statistical inference about the population mean would require the normal distribution.

c. Statistical inference about the population mean would require the t-distribution.

d. Either the normal or t-distribution could be used.

Answer #1

The mean resting pulse rate for men is 72 beats per minute. A
simple random sample of men who regularly work out at Mitch's Gym
is obtained and their resting pulse rates (in beats per minute) are
listed below. Use a 0.05 significance level to test the claim that
these sample pulse rates come from a population with a mean less
than 72 beats per minute. Assume that the standard deviation of the
resting pulse rates of all men who...

For a random sample of 9 women, the average resting pulse rate
is x = 76 beats per minute, and the sample standard deviation is s
= 5. The standard error of the sample mean is____________
a. 0.557
b. 2.778
c. 0.745
d. 1.667

A random sample of 14 men's resting pulse rates showed a mean
of 71.5 beats per minute and standard deviation of 19.9. Assume
that pulse rates are Normally distributed. Use the table to
complete parts (a) through (c) below. LOADING... Click the icon
to view the t-table. a. Find a 95% confidence interval for the
population mean pulse rate of men, and report it in a sentence.
Choose the correct answer below and, if necessary, fill in the
answer boxes...

Assume that females have pulse rates that are normally
distributed with a mean of mu equals 73.0μ=73.0 beats per minute
and a standard deviation of sigma equals 12.5σ=12.5 beats per
minute. Complete parts (a) through (c) below.
a. If 1 adult female is randomly selected, find the probability
that her pulse rate is between 6969 beats per minute and 7777 beats
per minute. The probability is
b. If 2525 adult females are randomly selected, find the
probability that they have...

Find the requested value.
A researcher wishes to estimate the mean resting heart rate for
long-distance runners. A random sample of runners yields
the following heart rates, in beats per minute.
Use the data to obtain a point estimate of the mean resting heart
rate for all long distance runners.
69.6 beats per minute
66.2 beats per minute
64.6 beats per minute
67.8 beats per minute

A random sample of 33 students have a mean resting heart rate of
71.12 beats per minute and standard deviation of 13.05 beats per
minute.
(a) What is a point estimate for the mean resting heart rate of
the students?
(b) Verify the two requirements for constructing a confidence
interval are satisfied by this problem
(c) Determine and interpret a 95% confidence interval for
resting heart rate of the students. Do not use the T-Interval or
Z-Interval features of your...

Assume that females have pulse rates that are normally
distributed with a mean of μ=76.0 beats per minute and a standard
deviation of σ=12.5 beats per minute. Complete parts (a) through
(c) below.
a. If 1 adult female is randomly selected, find the probability
that her pulse rate is between 70 beats per minute and
82 beats per minute.The probability is _________ (Round to four
decimal places as needed.)
b. If 4 adult females are randomly selected, find the
probability...

Forty students measure their resting pulse rates, then march in
place for one minute and measure their pulse rates after the
marching. The regression line for the sample is (^y)= 17.75 +
0.897x, where y = pulse after marching and x = pulse before
marching. The following Minitab output gives a confidence interval
and a prediction interval for pulse after marching when pulse
before marching is 70.
Fit SE Fit 95% CI 95% PI
80.34 1.15 (77.9, 82.67) (65.51, 95.17)...

Assume that females have pulse rates that are normally
distributed with a mean of μ = 74.0 beats per minute and a standard
deviation of σ = 12.5 beats per minute. Complete parts (a) through
(c) below.
a. If 1 adult female is randomly selected, find the probability
that her pulse rate is less than 81 beats per minute.
The probability is? (Round to four decimal places as
needed.)
b. If 4 adult females are randomly selected, find the
probability...

A random sample of 18
men's resting pulse rates showed a mean of
70.3
beats per minute and standard deviation of
16.5
Assume that pulse rates are Normally distributed. Use the table
to complete parts (a) through (c) below.
a. Find a 95% confidence interval for the population mean pulse
rate of men, and report it in a sentence. Choose the correct
answer belowand, if necessary, fill in the answer boxes to
complete your choice.

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