7. Given in the table are the BMI statistics for random samples
of men and women....
7. Given in the table are the BMI statistics for random samples
of men and women. Assume that the two samples are independent
simple random samples selected from normally distributed
populations, and do not assume that the population standard
deviations are equal. Complete parts (a) and (b) below. Use a
0.05 significance level for both parts.
Male BMI
Female BMI
µ
µ1
µ2
N
48
48
xˉ
27.6431
26.5609
s
7.105107
4.438441
The test statistic, t, is ____
(Round to...
You have asked a sample of men and women in your community
whether or not they...
You have asked a sample of men and women in your community
whether or not they intend to vote for a gas tax to raise money for
public transportation. Of the men, 15 said "yes" and 20 said "no";
of the women, 25 said "yes" and 10 said "no". Assuming that proper
experimental procedures have been followed, what can you
conclude?
(note: if you determine that the df = 1, or an expected
frequency is less than 5, then you...
A university investigation was conducted to determine whether
women and men complete medical school in significantly...
A university investigation was conducted to determine whether
women and men complete medical school in significantly different
amounts of time, on the average. Two independent random samples
were selected and the following summary information concerning
times to completion of medical school computed. Perform the
appropriate test of hypothesis, at level 0.05 to determine whether
there is a significant difference in time to completion of medical
school between women and men.
Women
Men
Sample Size
90
100
Mean
8.4 years
8.5...
Suppose independent random samples of 16 unionized women and 18
nonunionized women in manufacturing have been...
Suppose independent random samples of 16 unionized women and 18
nonunionized women in manufacturing have been selected and the
following hourly wage rates are found.
Union Worker: 22.40, 16.50, 18.50, 16.70, 19.80, 14.05, 17.00,
18.90, 16.20, 14.30, 20.00, 17.20, 16.10, 17.30, 19.10 ,12.30
Nonunion Worker: 17.60, 15.90, 13.90, 14.40, 19.20, 14.50,
16.60, 11.85, 15.00, 16.45, 17.65, 1 4.20, 15.00, 15.30, 17.55,
17.00, 13.30, 15.10
a. What is the point estimate of the difference between hourly
wages for the two populations?...
8. In the population, there is no difference between men and
women on a certain test....
8. In the population, there is no difference between men and
women on a certain test.
However, the mean for men was higher than the mean for women in
your sample, and with a t of 4.532 and a p-value of .004, you have
determined it is appropriate to reject the null hypothesis and
conclude a difference does exist.
What type of error did you make?
A. Type I
B. Type II
C. You confirmed the null hypothesis.
D. Standard...