A simple random sample of 900 people are surveyed, and it was found that 423 of...
A simple random sample of 900 people are surveyed, and it was found that 423 of them like to shop online.
Test the hypothesis that the proportion of people who like to shop online is 50% State the Null and Alternate hypothesis, and the test statistic that is used, and the decision rule for rejecting the Null hypothesis.
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A simple random sample of 900 people are surveyed, and it was
found that 423 of...
A Harris poll taken randomly surveyed 2,016 adults and found that 423 of them had one...
A Harris poll taken randomly surveyed 2,016 adults and found that 423 of them had one or more tattoos. Test the claim that less than 25% of adults have one or more tattoos. Use a 5% level of significance. State the decision rule
At a certain college a random sample of 90 college students were surveyed and 75 students...
At a certain college a random sample of 90 college students were surveyed and 75 students were found to have cars on campus. It had long been believed that 80% of students kept their cars on campus. Is there evidence, using alpha = 0.05, to say the proportion has increased? State the type of test you are performing (multiple choice) State the null and alternative hypotheses Using Minitab results, state the test statistic Using Minitab results, state the p-value Decision...
uppose that I gathered a random sample of 5 people and surveyed them about their GPA....
uppose that I gathered a random sample of 5 people and surveyed
them about their GPA. The results are listed below.
Student
GPA
A
3
B
2.49
C
1.65
D
1.91
E
3.05
I hypothesize that the population mean for GPA is 3.16. What is the
t-statistic for my sample mean given this null hypothesis?
What is the critical value for the t-statistic at the 95%
confidence level when you have 5 observations?
Hint: You'll need a t-table. Round your...
A simple random sample of 1088 adults is conducted. It is found that 261 of the...
A simple random sample of 1088 adults is conducted. It is found that 261 of the 1088 adults smoke. Use a .05 significance level to test the claim that the proportion of adult smokers is at least 20%. (a) Find the null and alternative hypothesis. (b) determine if the test is a right-tail test, left-tail test, or a two-tail test. (c) Find the test statistics. (d) find the p-value. (e) do you reject the null hypothesis or fail to reject...
Based on information from a previous study, r = 34 people out of a random sample...
Based on information from a previous study, r = 34 people out of a random sample of n = 101 adult Americans who did not attend college believe in extraterrestrials. However, out of a random sample of n2 = 101 adult Americans who did attend college, '2 = 47 claim that they believe in extraterrestrials. Does this indicate that the proportion of people who attended college and who believe in extraterrestrials is higher than the proportion who did not attend...
In a simple random sample of 76 Alzheimer's patients, 12 of them were allergic to a...
In a simple random sample of 76 Alzheimer's patients, 12 of them were allergic to a drug. When testing the claim that more than 15% of all Alzheimer's patients are allergic to this drug: a) Specify the null hypothesis and the alternate hypothesis and identify the claim b) State the conditions and show how all conditions for inference have been satisfied c) Specify the type of test statistic, show its formula, show the correct numbers plugged in and give its...
A random sample of 1000 voters registered in the state of Montana showed that 490 voted...
A random sample of 1000 voters registered in the state of Montana showed that 490 voted in the last general election. A random sample of 800 voters in the state of Arizona showed that 368 voted in the most recent general election. Do these data indicate that the population percentage of voter turnout in Arizona is lower than that in Montana? 11. Choose the appropriate null and alternate hypotheses. a. Null: The percentage of people who voted in Arizona and...
In a random sample of 125 adults, 64% say they have used a cellular phone to...
In a random sample of 125 adults, 64% say they have used a cellular phone to access the Internet. We want to test a researcher’s claim at the 5% significance level that more than 60% of U.S. adults have used a cellular phone to access the Internet. [2 points] Find the null and alternate hypotheses. [6 points] By hand, showing work, find the test statistic. [4 points] Sketch the sampling distribution labeling the test statistic and the P-value. [2 points]...
Given two independent random samples with the following results: n1pˆ1=685=0.5 n2pˆ2=510=0.67 Can it be concluded that...
Given two independent random samples with the following results: n1pˆ1=685=0.5 n2pˆ2=510=0.67 Can it be concluded that the proportion found in Population 2 exceeds the proportion found in Population 1? Use a significance level of α=0.05 for the test. Step 1 of 5 : State the null and alternative hypotheses for the test. Step 2 of 5: Compute the weighted estimate of p, ‾‾p. Round your answer to three decimal places. Step 3 of 5: Compute the value of the test...
Given two independent random samples with the following results: n1pˆ1=220=0.74 n2pˆ2=463=0.81 Can it be concluded that...
Given two independent random samples with the following results: n1pˆ1=220=0.74 n2pˆ2=463=0.81 Can it be concluded that the proportion found in Population 2 exceeds the proportion found in Population 1? Use a significance level of α=0.01 for the test. Step 1 of 5: State the null and alternative hypotheses for the test. Step 2 of 5: Compute the weighted estimate of p, p‾. Round your answer to three decimal places. Step 3 of 5: Compute the value of the test statistic. Round...
A Harris poll taken randomly surveyed 2,016 adults and found that 423 of them had one or more tattoos. Test the claim that less than 25% of adults have one or more tattoos. Use a 5% level of significance. State the decision rule
uppose that I gathered a random sample of 5 people and surveyed
them about their GPA. The results are listed below.
Student
GPA
A
3
B
2.49
C
1.65
D
1.91
E
3.05
I hypothesize that the population mean for GPA is 3.16. What is the
t-statistic for my sample mean given this null hypothesis?
What is the critical value for the t-statistic at the 95%
confidence level when you have 5 observations?
Hint: You'll need a t-table. Round your...
Based on information from a previous study, r = 34 people out of a random sample of n = 101 adult Americans who did not attend college believe in extraterrestrials. However, out of a random sample of n2 = 101 adult Americans who did attend college, '2 = 47 claim that they believe in extraterrestrials. Does this indicate that the proportion of people who attended college and who believe in extraterrestrials is higher than the proportion who did not attend...
In a simple random sample of 76 Alzheimer's patients, 12 of them were allergic to a drug. When testing the claim that more than 15% of all Alzheimer's patients are allergic to this drug: a) Specify the null hypothesis and the alternate hypothesis and identify the claim b) State the conditions and show how all conditions for inference have been satisfied c) Specify the type of test statistic, show its formula, show the correct numbers plugged in and give its...
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