Question
In: Statistics and Probability
A local retail business wishes to determine if there is a difference in the mean preferred...
A local retail business wishes to determine if there is a difference in the mean preferred indoor temperature between men and women. Assume that the population standard deviations of preferred temperatures are equal between men and women. Two independent random samples are collected. Sample statistics of preferred temperatures are reported in the table below.
Sample size Mean (in Celsius) Standard deviation
Men (Group 1) 25 22.5 1.2
Women (Group 2) 22 20.1 1.4
In testing whether two population means are different, the value of test statistic is .
Solutions
orchestra answered 1 year agoRelated Solutions
A local retail business wishes to determine if there is a difference in the mean preferred...
A local retail business wishes to determine if there is a
difference in the mean preferred indoor temperature between men and
women. Assume that the population standard deviations of preferred
temperatures are equal between men and women. Two independent
random samples are collected. Sample statistics of preferred
temperatures are reported in the table below.
Sample size Mean (in Celsius) Standard deviation
Men (Group 1) 25 22.5 1.2
Women (Group 2) 22 20.1 1.4
Suppose that we perform a two-tailed test...
Questions 8 and 9 are based on the following information: A local retail business wishes to...
Questions 8 and 9 are based on the following information:
A local retail business wishes to determine if there is a
difference in the mean preferred indoor temperature between men and
women. Assume that the population standard deviations of pre-
ferred temperatures are equal between men and women. Two
independent random samples are collected. Sample statistics of
preferred temperatures are reported in the table below.
Sample Size
Mean (In Celsius)
Men (Group 1)
25
22.5
Women (Group 2)
22
20.1...
A amateur golfer wishes to determine if there is a difference between the drive distances of...
A amateur golfer wishes to determine if there is a difference
between the drive distances of her twofavorite drivers. (A driver
is a specialized club for driving the golf ball down range.) She
hitsfourteen balls with driver A and 10 balls with driver B. The
drive distances (in yards) for the trialsare show below.Driver
A259198218229227233224266261207236193260217Driver
B174257221272273201216299210256Assume that the populations are
approximately normal. Construct a 95% confidence interval for
thedifference between the mean drive distances for the two
drivers.
Philip Morris wishes to determine if there is a difference between the proportion of women and...
Philip Morris wishes to determine if there is a difference
between the proportion of women and proportion of men who smoke
cigarettes. Random samples of 125 women and 140 men reveal that 13
women and 5 men smoke cigarettes. Does the data indicate that the
proportion of women who smoke cigarettes is higher than the
proportion of men who do at α=.01?
What is the 95% confidence interval for pWomen -
pMen?
a.
(0.0066, 0.1300)
b.
(0.0174, 0.1192)
c.
(0.0076,...
Philip Morris wishes to determine if there is a difference between the proportion of women and...
Philip Morris wishes to determine if there is a difference
between the proportion of women and proportion of men who smoke
cigarettes. Random samples of 120 women and 110 men reveal that 8
women and 16 men smoke cigarettes. Does the data indicate that the
proportion of women who smoke cigarettes is lower than the
proportion of men who do at α=.05?
What is the 99% confidence interval for pWomen -
pMen?
a.
None of the answers is correct
b....
Philip Morris wishes to determine if there is a difference between the proportion of women and...
Philip Morris wishes to determine if there is a difference
between the proportion of women and proportion of men who smoke
cigarettes. Random samples of 105 women and 115 men reveal that 7
women and 18 men smoke cigarettes. Does the data indicate that the
proportion of women who smoke cigarettes is lower than the
proportion of men who do at α=.025?
For the hypothesis stated above, what is the test statistic (in
terms of "Women" minus "Men")?
a.
-2.1537...
A microbiologist wishes to determine whether there is any difference in the time it takes to...
A microbiologist wishes to determine whether there is any
difference in the time it takes to make yogurt from two different
starters: lactobacillus acidophilus (A) and bulgarius (B).
Seven batches of yogurt were made with each of the starters. The
table below shows the time, in hours, to make each batch. Assume
that both sets of times may be considered to
be random samples from normal populations. Determine whether the
mean time taken to make yogurt is the same for...
A real state agent wishes to determine if there is a significant difference in the selling...
A real state agent wishes to determine if there is a significant
difference in the selling prices of homes in two Seattle suburbs.
She took a sample of 41 homes from the first suburbs and found the
average selling price from was $261,225. The standard deviation of
all homes in that suburb is $5,602. She took a sample of 61 homes
from the second suburb and the average selling price was $259,102.
The standard deviation of all homes in the...
A movie director wishes to determine whether there is a difference in the type of movies...
A movie director wishes to determine whether there is a
difference in the type of movies selected by males and
females for Wisconsin International University College Students. A
random sample provides the data given
here.
Type of movie
Gender
Fiction
Romance
Thriller
Total
Male
24
20
19
63
Female
13
14
20
47
(a) State your alternative hypothesis.
(b) State your null hypothesis.
(c) Compute the appropriate value for the test statistics
(d) A p-value of 0.335 was found. What...
A movie director wishes to determine whether there is a difference in the type of movies...
A movie director wishes to determine whether there is a
difference in the type of movies selected by males and females for
Wisconsin International University College Students. A random
sample provides the data given here.
Type of Movie
Gender Fiction Romance Thriller total
Male 24 20 19 63
Female 13 14 20 47
(a) State your alternative hypothesis.
(b) State your null hypothesis.
(c) Compute the appropriate value for the test statistics
(d) A p-value of 0.335 was found....
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