Question
In: Statistics and Probability
A survey asked a random sample of n=2752 US adults whether they had visited a public...
A survey asked a random sample of n=2752 US adults whether they had visited a public library in the last 12 months. THe results for males and females are shown in the following Table.
| Gender | Yes | No | Total |
| Females | 726 | 697 | 1423 |
| Males | 505 | 824 | 1329 |
| Total | 1231 | 1521 | 2752 |
A) Find pf and Pm, the sample proportions who have visited a public library in the last 12 months, for females and males respectively. What is the difference in samle proportions Pf-Pm?
B) Find a 95% confidence interval for the difference in population proportions Pf-Pm.
c) Can we conclude from the confidence interval that there is a difference in the proportion? if so, are males or females more likely to visit the public library?
Solutions
orchestra answered 1 year agoRelated Solutions
A random sample of 250 Washington residents who had recently visited a car dealership were asked...
A random sample of 250 Washington residents who had recently
visited a car dealership were asked which type of vehicle they were
most likely to purchase, with the summarized results shown.
Research question: At the 10% level of significance, is
the choice of vehicle type independent of the buyer’s age? (15
points)
Buyer’s Age
Politics
Under 30
30 < 50
50 and Over
Row Total
Diesel
6
12
16
34
Gasoline
14
32
50
96
Hybrid
25
25
25
75...
A survey asked a random sample of adults in a nation two questions: (1) Would you...
A survey asked a random sample of adults in a nation two
questions: (1) Would you favor or oppose a law which would require
a person to obtain a police permit before he or she could buy a
gun? (2) Do you favor or oppose the death penalty for persons
convicted of murder? Results of the survey are available below.
Does the sample evidence suggest the proportion of adults in this
nation who favor permits for guns is different from...
A 2020 Pew Research survey asked a random sample of 4860 American adults if they have...
A 2020 Pew Research survey asked a random sample of 4860
American adults if they have ever used online dating (website or
mobile app) and found that 30 percent of respondents had ever done
so.
Q1
Which math symbol(s) would represent the cited value 30
percent?
mm
nn
x¯x¯
x¯1−x¯2x¯1−x¯2
σσ
CC
zz
μdiffμdiff
μμ
tt
p^p^
x¯diffx¯diff
μ1−μ2μ1−μ2
Q2
(Please answer very clear and detail)
Obtain a 95% confidence interval estimating the prevalence
(rate) of online dating among American...
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 simple random sample was conducted of 1405 Canadian adults. They were asked whether they were...
A simple random sample was conducted of 1405 Canadian adults.
They were asked whether they were in favor of tighter enforcement
of tobacco laws. Of the 1405 adults, 1060 responded yes. Obtain a
95% confidence interval for the
proportion of Canadian adults who are in favor of
tighter enforcement of tobacco laws.
Of 15, 344 Virginians tested for COVID-19 in March of 2020,
1,484 had positive or presumptive positive results for the virus.
Assuming the other 49 states had results...
1) The Gallup Poll asked a random sample of 1785 adults whether they attended church or...
1) The Gallup Poll asked a random sample of 1785 adults whether
they attended church or synagogue during the past week. Of the
respondents, 44% said they did attend. Suppose that 40% of the
adult population actually went to church or synagogue last week.
Let p^ be the proportion of people in the sample who attended
church or synagogue. Find the probability of obtaining a sample of
1785 adults in which 44% or more say they attended church or
synagogue...
Mimi conducted a survey on a random sample of 100 adults. 58 adults in the sample...
Mimi conducted a survey on a random sample of 100 adults. 58
adults in the sample chose banana as his / her favorite fruit.
Construct a 95% confidence interval estimate of the proportion of
adults whose favorite fruit is banana. Show all work. Just the
answer, without supporting work, will receive no credit.
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...
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...
22% of US adults use Twitter. A random sample of 15 US adults is selected. a)...
22% of US adults use Twitter. A random sample of 15 US adults is
selected. a) Find the probability that the sample contains exactly
4 Twitter users. b) Find the probability that at least one US adult
in the sample uses Twitter. c) Find the mean and standard deviation
for the number of US adults using Twitter.
ADVERTISEMENT
ADVERTISEMENT
Latest Questions
- Suppose Rialto is the only movie cinema in a small college town, so it is essentially...
- With VMI, members of the supply chain share planning, demand, forecasting, and inventory information.
- Large lots are desirable in supply chain coordination despite increasing holding costs.
- ***Convert the C++ to Python*** #include <iostream> using std::cout; using std::cin; using std::endl; int charClass; char...
- Make-or-Buy Decision Fremont Computer Company has been purchasing carrying cases for its portable computers at a...
- The following costs were incurred for the single product produced during the first year of operations...
- Non-constant growth model: Do=$2.00 required return on equity= 5% g= 9% n=1,2 g=7% n=3,4 g=3% n=5...
ADVERTISEMENT