Question
In: Statistics and Probability
Watching TV: The general Social Survey asked a large number of people how much time they...
Watching TV: The general Social Survey asked a large number of people how much time they spent watching TV each day. The mean number of hours was 3.09 with a standard deviation of 2.93 . Assume that in a sample of 34 teenagers, the sample standard deviation of daily TV time is 4.1 hours, and that the population of TV watching times is normally distributed. Can you conclude that the population standard deviation of TV watching times for teenagers differs from 2.93? Use the level of significance a=.10.
Find the critical values. Round the answer to three decimal places. ____ and _____
Solutions
orchestra answered 1 year agoRelated Solutions
1. The General Social Survey (2008) asked a random sample of people whether they agree with...
1. The General Social Survey (2008) asked a random sample of
people whether they agree with the following statement: A husband’s
job is to earn money; a wife’s job is to take care of the home.
Based on this data (displayed below), conduct a chi-square
hypothesis test to assess whether there are statistically
significant gender differences in feelings about gender roles ( =
0.05).
Male
Female
Total
Agree
181
195
376
Neither
142
145
287
Disagree
290
413
703
Total...
Satisfied?A poll taken by the General Social Survey in 2010 asked people in the United States...
Satisfied?A poll taken by the General Social Survey in 2010
asked people in the United States whether they were satisfied with
their financial situation. A total of 478 out of 2038 people said
they were satisfied. The same question was asked in 2014, and 698
out of 2532 people said they were satisfied.
a. Construct a 95% confidence interval for the difference
between the proportion of adults who said they were satisfied in
2014 and the proportion in 2010.
b....
1. The General Social Survey (2008) asked a random sample of people whether they agree with...
1. The General Social Survey (2008) asked a random sample of
people whether they agree with the following statement: A husband’s
job is to earn money; a wife’s job is to take care of the home.
Based on this data (displayed below), conduct a chi-square
hypothesis test to assess whether there are statistically
significant gender differences in feelings about gender roles ( =
0.05). Male Female Total Agree 183 192 375 Neither 143 140 283
Disagree 288 412 700 Total...
In 2012, the General Social Survey asked a random sample of adults, "Compared to most people,...
In 2012, the General Social Survey asked a random sample of
adults, "Compared to most people, how informed are you about
politics?" Suppose that the following are the data classified by
their responses to this question and their age group (the data has
been modified slightly for testing purposes):
Not at All
A little
Somewhat
Very
Extremely
Age 20-29
7
29
28
13
0
Age 30-39
16
29
56
22
8
Age 40-49
3
24
50
26
14
Age 50...
A random sample of 15 people was asked to record how much TV they watched every...
A random sample of 15 people was asked to record how much TV
they watched every day for a week. The total number of hours each
person watched during the week is displayed below.
a. Is a normal approximation appropriate here?
A. Yes
B. No
The data are shown below.
0.0
7.8
8.6
9.7
11.3
17.7
19.0
19.1
19.5
20.4
22.9
25.8
33.8
36.8
39.2
b. If a normal approximation is appropriate, find the
probability that a randomly selected person...
A random sample of 15 people was asked to record how much TV they watched every...
A random sample of 15 people was asked to record how much TV
they watched every day for a week. The total number of hours each
person watched during the week is displayed below.
The data are shown below.
0.0
7.8
8.6
9.7
11.3
17.7
19.0
19.1
19.5
20.4
22.9
25.8
33.8
36.8
39.2
b. If a normal approximation is appropriate, find the
probability that a randomly selected person in
the population watches less than 9 of TV per
week....
1- From the 2008 General Social Survey, females and males were asked about the number of...
1-
From the 2008 General Social Survey, females and males were
asked about the number of hours a day that the subject watched TV.
Females (n = 698) reported a mean of 3.08 hours with a standard
deviation of 2.70 hours. Males (n = 626) reported a mean of 2.87
hours with a standard deviation of 2.61 hours. Test that the mean
hours of TV watched by men and women is different from zero at the
5% significance level.
n...
From the 2008 General Social Survey, females and males were asked about the number of hours...
From the 2008 General Social Survey, females and males were
asked about the number of hours a day that the subject watched TV.
Females (n = 698) reported a mean of 3.08 hours with a standard
deviation of 2.70 hours. Males (n = 626) reported a mean of 2.87
hours with a standard deviation of 2.61 hours. Test that the mean
hours of TV watched by men and women is different from zero at the
5% significance level.
n 1...
From the 2008 General Social Survey, females and males were asked about the number of hours...
From the 2008 General Social Survey, females and males were
asked about the number of hours a day that the subject watched TV.
Females (n = 698) reported a mean of 3.08 hours with a standard
deviation of 2.70 hours. Males (n = 626) reported a mean of 2.87
hours with a standard deviation of 2.61 hours. Test that the mean
hours of TV watched by men and women is different from zero at the
5% significance level.
n 1...
From the 2008 General Social Survey, females and males were asked about the number of hours...
From the 2008 General Social Survey, females and males were
asked about the number of hours a day that the subject watched TV.
Females (n = 698) reported a mean of 3.08 hours with a standard
deviation of 2.70 hours. Males (n = 626) reported a mean of 2.87
hours with a standard deviation of 2.61 hours. Test that the mean
hours of TV watched by men and women is different from zero at the
5% significance level.
(A) What...
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