Question

A. How many commuters must be randomly selected to estimate the mean driving time of Chicago commuters? We want 90% confidence that the sample mean is within 4 minutes of the population mean, and the population standard deviation is known to be 12 minutes.

B. The health of employees is monitored by periodically weighing them in. A sample of 54 employees has a mean weight of 183.9 lb. Assuming that σ is known to be 121.2 lb, create as 85% confidence interval for the mean weight.

Answer #1

Show all work.
The health of employees is monitored by periodically weighing
them in. A sample of 54 employees has a mean weight of 183.9 lb.
Assuming that σ is known to be 121.2 lb, create as 85% confidence
interval for the mean weight.

Show all work
How many commuters must be randomly selected to estimate the
mean driving time of Chicago commuters? We want 90% confidence that
the sample mean is within 4 minutes of the population mean, and the
population standard deviation is known to be 12 minutes.

9.) How many commuters must be randomly selected to estimate the
mean driving time of Chicago commuters? We want 95% confidence that
the sample mean is within 3 minutes of the population mean, and the
population standard deviation is known to be 12 minutes.
A. 61 commuters
B. 8 commuters
C. 62 commuters
D. 7 commuters
10.) If we increase our sample size the width of the confidence
interval will
A. increase
B. stay the same
C. decrease
11.) Data...

Identify the null hypothesis, alternative hypothesis, test
statistic, P-value, conclusion about the null hypothesis, and final
conclusion that addresses the original claim. The health of
employees is monitored by periodically weighing them in. A sample
of 54 employees has a mean weight of 183.9 lb. Assuming that ? is
known to be 121.2 lb, use a 0.10 significance level to test the
claim that the population mean of all such employees weights is
less than 200 lb.

the health of employees in monitored by periodically
weighing them in. s sample of 54 employees has a mean weight of
183.9. assuming that a standard deviation is known to be 121.2
pounds. use a 0.10 significance level to test the claim that the
population mean of all such employees weights is less than 200
pounds

Question 2
The health of employees is monitored by periodically weighing them
in. A sample of 54
employees has a mean weight of 183.9 lb. Assuming that σ is known
to be 121.2 lb, use a 0.10
significance level to test the claim that the population mean of
all such employees weights is less
than 200 lb.
(a) State the null and alternative hypotheses for the test. [3
marks]
(b) Calculate the value of the test statistic for this test....

The health of employees is monitored by periodically weighing
them in. A sample of 54 employees has a mean weight of 183.9 lb.
Assuming that σ is known to be 21.2 lb, use a 0.05 significance
level to test the claim that the population mean of all such
employees weights is less than 200 lb. Use the critical value
method.
Initial Claim:
Null Hypothesis:
Alternative Hypothesis
Test statistic (make sure you state which test statistic that
you are using):
Critical...

How many women must be randomly selected to estimate the mean
weight of women in one age group. We want 90% confidence that the
sample mean is within 2.3lb of the population mean, and the
population standard deviation is known to be 14 lb.
143
202
126
101

Use the given information to find the minimum sample
size required to estimate an unknown population mean
.
How many commuters must be randomly selected to estimate the mean
driving time of Chicago commuters? We want 98% confidence that the
sample mean is within 3 minutes of the population mean, and the
population standard deviation is known to be 8 minutes.

The
health of college students is monitored by periodically weighing
them in. A sample of 32 students has a means weight of 145.9 lb.
Assuming that the population standard deviation is known to be 81.2
lb, use a 0.10 significance level to test the claim that the
populaion mean of all such students weights is different than 150
lb. Show all 5 steps. Interpret your solution.

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