In 1997, a survey of 900 households showed that 137 of them use e-mail. Use those...
In 1997, a survey of 900 households showed that 137 of them use e-mail. Use those sample results to test the claim that more than 15% of households use e-mail. Use a 0.05 significance level. Use this information to answer the following questions.
a.What is the test statistic?
b.What is the P-value?
c.What is the conclusion?
a)There is not sufficient evidence to support the claim that more than 15% of households use e-mail.
or
b)There is sufficient evidence to support the claim that more than 15% of households use e-mail. Is the conclusion valid today? Why or why not?
Homework Answers
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In 1997, a survey of 900 households showed that 137 of them
use e-mail. Use those...
In 1997, a survey of 880 households showed that 139 of them use e-mail. Use those...
In 1997, a survey of 880 households showed that 139 of them
use e-mail. Use those sample results to test the claim that more
than 15% of households use e-mail. Use a 0.05 significance
level.
i
accidentally posted the same question twice, how do i delete
this?
In 1997, a survey of 880 households showed that 139 of them use e-mail. Use those sample results to test the claim that more than 15 % of households use e-mail. Use a...
In 1997, a survey of 880 households showed that 139 of them use e-mail. Use those sample results to test the claim that...
In 1997, a survey of 880 households showed that 139 of them
use e-mail. Use those sample results to test the claim that more
than 15% of households use e-mail. Use a 0.05 significance level.
Use this information to answer the following questions.
In 1997, a survey of 880 households showed that 139 of them use e-mail. Use those sample results to test the claim that more than 15% of households use e-mail. Use a 0.05 significance level. Use this...
In? 1997, a survey of 840 households showed that 140 of them use? e-mail. Use those...
In? 1997, a survey of 840 households showed that 140 of them use? e-mail. Use those sample results to test the claim that more than? 15% of households in 1997 used? e-mail. State which test you are using and find the p-value for the hypothesis test. Do not state the conclusion.
In 1997, a survey of 960 households showed that 145 of them use e-mail. Use those...
In 1997, a survey of 960 households showed that 145 of them use e-mail. Use those sample results to test the claim that more than 15% of households use e-mail. Use a 0.05 significance level. Use this information to answer the following questions. a. Which of the following is the hypothesis test to be conducted? ○ A. Ho :p=0.15 OB. Ho: p> 0.15 H1: p 0.15 OD. Ho:p=0.15 H p<0.15 F. Ho: p < 0.15 H1 :p=0.15 H1: p>0.15 °...
A survey of 445 workers showed that 140 said it was unethical to monitor employee e-mail....
A survey of 445 workers showed that 140 said it was unethical to monitor employee e-mail. When 110 senior-level bosses were surveyed, 41 said it was unethical to monitor employee e-mail. At the 10% significance level, do the data provide sufficient evidence to conclude that the proportion of workers that say monitoring employee e-mail is unethical is less than the proportion of bosses? Use the two-proportions z-test to conduct the required hypothesis test. Let population 1 be workers, and let...
A survey of 1,680 randomly selected adults showed that 549 of them have heard of a...
A survey of 1,680 randomly selected adults showed that 549 of them have heard of a new electronic reader. The accompanying technology display results from a test of the claim that 37% of adults have heard of the new electronic reader. Use the normal distribution as an approximation to the binomial distribution, and assume a 0.01 significance level to complete parts a through e Sample proportion: 0.326786 Test statistic Critical z: P-Value z:-3.6687 ± 2.5758 0.0002 a. Is the test...
One research study of illegal drug use among 12- to 17-year-olds reported a decrease in use...
One research study of illegal drug use among 12- to 17-year-olds reported a decrease in use (from 11.4% in 1997) to 9.9% now. Suppose a survey in a large high school reveals that, in a random sample of 1,059 students, 95 report using illegal drugs. Use a 0.05 significance level to test the principal's claim that illegal drug use in her school is below the current national average. Find the test statistic. Z = Find the P-value for the found...
One research study of illegal drug use among 12- to 17-year-olds reported a decrease in use...
One research study of illegal drug use among 12- to 17-year-olds reported a decrease in use (from 11.4% in 1997) to 9.8% now. Suppose a survey in a large high school reveals that, in a random sample of 1,052 students, 95 report using illegal drugs. Use a 0.05 significance level to test the principal's claim that illegal drug use in her school is below the current national average. Formulate the null and alternative hypotheses. Find the test statistic. z= P-value=...
18. A researcher claims that more than 75% of the adults believe in global warming, Mimi conducte...
18. A researcher claims that more than 75% of the adults believe in global warming, Mimi conducted a survey on a random sample of 300 adults. The survey showed that 240 adults in the sample believe in global warming. Assume Mimi wants to use a 0.05 significance level to test the researcher's claim. (a) What is the appropriate hypothesis test to use for this analysis? Please identify and explain (b) Identify the null hypothesis and the alternative hypothesis. why it...
VULJHUIV 17 A survey of 700 non-fatal accidents in the United States showed that about 23%...
VULJHUIV 17 A survey of 700 non-fatal accidents in the United States showed that about 23% involved uninsured drivers. The margin of error is 3 percentage points with a 95% confidence. Does the confidence interval support the claim that at least 25% of non-fatal accidents in the United States involve uninsured drivers. Why? No; the interval does not support this claim because the interval contains values that are above 25% O No; the interval does not support this claim because...
In 1997, a survey of 880 households showed that 139 of them
use e-mail. Use those sample results to test the claim that more
than 15% of households use e-mail. Use a 0.05 significance
level.
i
accidentally posted the same question twice, how do i delete
this?
In 1997, a survey of 880 households showed that 139 of them use e-mail. Use those sample results to test the claim that more than 15 % of households use e-mail. Use a...
In 1997, a survey of 880 households showed that 139 of them
use e-mail. Use those sample results to test the claim that more
than 15% of households use e-mail. Use a 0.05 significance level.
Use this information to answer the following questions.
In 1997, a survey of 880 households showed that 139 of them use e-mail. Use those sample results to test the claim that more than 15% of households use e-mail. Use a 0.05 significance level. Use this...
In 1997, a survey of 960 households showed that 145 of them use e-mail. Use those sample results to test the claim that more than 15% of households use e-mail. Use a 0.05 significance level. Use this information to answer the following questions. a. Which of the following is the hypothesis test to be conducted? ○ A. Ho :p=0.15 OB. Ho: p> 0.15 H1: p 0.15 OD. Ho:p=0.15 H p<0.15 F. Ho: p < 0.15 H1 :p=0.15 H1: p>0.15 °...
A survey of 445 workers showed that 140 said it was unethical to monitor employee e-mail. When 110 senior-level bosses were surveyed, 41 said it was unethical to monitor employee e-mail. At the 10% significance level, do the data provide sufficient evidence to conclude that the proportion of workers that say monitoring employee e-mail is unethical is less than the proportion of bosses? Use the two-proportions z-test to conduct the required hypothesis test. Let population 1 be workers, and let...
A survey of 1,680 randomly selected adults showed that 549 of them have heard of a new electronic reader. The accompanying technology display results from a test of the claim that 37% of adults have heard of the new electronic reader. Use the normal distribution as an approximation to the binomial distribution, and assume a 0.01 significance level to complete parts a through e Sample proportion: 0.326786 Test statistic Critical z: P-Value z:-3.6687 ± 2.5758 0.0002 a. Is the test...
18. A researcher claims that more than 75% of the adults believe in global warming, Mimi conducted a survey on a random sample of 300 adults. The survey showed that 240 adults in the sample believe in global warming. Assume Mimi wants to use a 0.05 significance level to test the researcher's claim. (a) What is the appropriate hypothesis test to use for this analysis? Please identify and explain (b) Identify the null hypothesis and the alternative hypothesis. why it...
VULJHUIV 17 A survey of 700 non-fatal accidents in the United States showed that about 23% involved uninsured drivers. The margin of error is 3 percentage points with a 95% confidence. Does the confidence interval support the claim that at least 25% of non-fatal accidents in the United States involve uninsured drivers. Why? No; the interval does not support this claim because the interval contains values that are above 25% O No; the interval does not support this claim because...
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