To study metabolism of insects, researchers fed 20 cockroaches a measured amount of a sugar solution....
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To study metabolism of insects, researchers fed 20 cockroaches a measured amount of a sugar solution. After 10 hours, they dissected the cockroaches and measured the amount of sugar in various tissues. The researchers wish to use the resulting data to estimate the mean amount of sugar in all cockroaches after 10 hours.
Hypothesis test for one population mean (unknown population standard deviation)
Confidence interval estimate for one population mean (unknown population standard deviation)
Hypothesis test for population mean from paired differences
Confidence interval estimate for population mean from paired differences
Hypothesis test for difference in population means from two independent samples
Confidence interval estimate for difference in population means from two independent samples
Hypothesis test for one population proportion
Confidence interval estimate for one population proportion
Hypothesis test for difference between two population proportions
Confidence interval estimate for difference between two population proportions
2 points
QUESTION 8
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The student newspaper at a local university want to know the proportion of undergraduate students who think tuition is too high. The take a simple random sample of 100 students and find 78 think tuition is too high. The editor of the newspaper wants a level of precision for this estimate.
Hypothesis test for one population mean (unknown population standard deviation)
Confidence interval estimate for one population mean (unknown population standard deviation)
Hypothesis test for population mean from paired differences
Confidence interval estimate for population mean from paired differences
Hypothesis test for difference in population means from two independent samples
Confidence interval estimate for difference in population means from two independent samples
Hypothesis test for one population proportion
Confidence interval estimate for one population proportion
Hypothesis test for difference between two population proportions
Confidence interval estimate for difference between two population proportions
Homework Answers
7)Confidence interval estimate for one population mean (unknown population standard deviation)
8)
Confidence interval estimate for one population proportion
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To study metabolism of insects, researchers fed 20 cockroaches a
measured amount of a sugar solution....
f test, 1propZtest, ttest, 2propZtest, Ztest , ANOVA, chi squared test, ttest on the differences, 2sampttest, linr...
f test, 1propZtest, ttest, 2propZtest, Ztest , ANOVA, chi squared
test, ttest on the differences, 2sampttest, linregttest
Match the hypothesis test with the corresponding calculator function mean (population standard deviation known) Select Answer mean (population standard deviation unknown) Select Answer matched pairs Select Answer correlation Select Answer 2 proportions Select Answer test for independence Select Answer 2 means (independent samples) Select Answer proportion Select Answer
Match the hypothesis test with the corresponding calculator function mean (population standard deviation known) Select...
1. Twelve pairs of identical twins that were separated at birth are reunited at age 21....
1. Twelve pairs of identical twins that were separated at birth are reunited at age 21. Each twin is weighed. Of interest is if identical twins raised separately will weigh within 10 pounds of each other as young adults. The sample average difference was 12.1 pounds with a standard deviation of 3.4 pounds. If we conduct a hypothesis test, the distribution to use is ______________. a. Normal b. Binomial c. Student-t with df = 24 d. Student-t with df =...
Forty refrigerators from two different models of a refrigerator manufacturer are compared to see if the...
Forty refrigerators from two different models of a refrigerator manufacturer are compared to see if the smaller model uses less energy than the larger model. The energy was measured in kilowatt hours per month (kwh/mo). From years of testing these models, it is known that the standard deviation of kwh/mo is 34 kwh/mo for the smaller model and 40 kwh/mo for the larger one. From this survey, the sample means and standard deviations are 125 and 34, and 90 and...
How do you know if a hypothesis test is testing the claim between 2 population proportions or 2 means? How is the test...
How do you know if a hypothesis test is testing the claim between 2 population proportions or 2 means? How is the test statistic for a claim about 2 population means, independent samples, standard deviations unknown, similar to the test statistic for 1 population mean, standard deviation unknown? If the difference between the 2 population means is not significant, which means the test statistic falls within the "usual" area of the distribution, what is the decision about the null hypothesis?...
A machine that puts corn flakes into boxes is adjusted to put an average of 15...
A machine that puts corn flakes into boxes is adjusted to put an average of 15 ounces into each box, with a standard deviation of 0.25 ounce. The distribution of ounces per box has a normal distribution. If a random sample of 12 boxes had a sample standard deviation of 0.38 ounce, does this data support the claim that the standard deviation has increased and the machine needs to be adjusted. Use a 0.01 level of significance. This problem is...
Please help. One hundred people participate in a multiplication study. They are timed to see how...
Please help. One hundred people participate in a multiplication study. They are timed to see how many single digit multiplication problems they can answer in their head without a mistake. Then, they each repeat the task with their eyes closed. For each individual, the difference in times is calculated. The purpose of the study is to determine if having your eyes opens slows down the time it takes to multiply. The hypothesis test to use is a. independent group means,...
One hundred men and one hundred women are surveyed to determine if the percent of women...
One hundred men and one hundred women are surveyed to determine if the percent of women that lie about their age is the same as the percent of men, or if the percent of women is higher than the percent of men. The hypothesis test to use is two proportions independent group means, population standard deviations known independent group means, population standard deviations unknown matched or paired samples Question 10 1 pts of interest is whether the percent of managers...
Part 1: Create your own Hypothesis Test and Confidence Interval from 1 sample Using methods from...
Part 1: Create your own Hypothesis Test and Confidence Interval from 1 sample Using methods from chapter 8, test ONE claim about a population parameter by collecting your own data or using our class survey data. Include your written claim, hypothesis in both symbolic and written form, relevant statistics (such as sample means, proportions etc.), test statistic, p-value (or critical value), conclusion, and interpretation of your conclusion in the context of your claim. Use a 0.05 significance level. You will...
Step 2 of 4: Calculate the sample standard deviation of the paired differences. Round your answer...
Step 2 of 4: Calculate the sample standard deviation of the
paired differences. Round your answer to six decimal places.
Step 3 of 4: Calculate the margin of error to be used in
constructing the confidence interval. Round your answer to six
decimal places.
Step 4 of 4: Construct the 90% confidence interval. Round your
answers to one decimal place
Given two dependent random samples with the following results: 31 18 32 20 17 32 Population 1 44 Population 2...
Given two dependent random samples with the following results: Population 1 3030 1515 2828 4444 2626...
Given two dependent random samples with the following results: Population 1 3030 1515 2828 4444 2626 4747 3232 Population 2 4444 2828 3636 3535 1818 3535 2222 Use this data to find the 95%95% confidence interval for the true difference between the population means. Assume that both populations are normally distributed. Copy Data Step 1 of 4: Find the point estimate for the population mean of the paired differences. Let x1x1 be the value from Population 1 and x2x2 be...
f test, 1propZtest, ttest, 2propZtest, Ztest , ANOVA, chi squared
test, ttest on the differences, 2sampttest, linregttest
Match the hypothesis test with the corresponding calculator function mean (population standard deviation known) Select Answer mean (population standard deviation unknown) Select Answer matched pairs Select Answer correlation Select Answer 2 proportions Select Answer test for independence Select Answer 2 means (independent samples) Select Answer proportion Select Answer
Match the hypothesis test with the corresponding calculator function mean (population standard deviation known) Select...
Forty refrigerators from two different models of a refrigerator manufacturer are compared to see if the smaller model uses less energy than the larger model. The energy was measured in kilowatt hours per month (kwh/mo). From years of testing these models, it is known that the standard deviation of kwh/mo is 34 kwh/mo for the smaller model and 40 kwh/mo for the larger one. From this survey, the sample means and standard deviations are 125 and 34, and 90 and...
One hundred men and one hundred women are surveyed to determine if the percent of women that lie about their age is the same as the percent of men, or if the percent of women is higher than the percent of men. The hypothesis test to use is two proportions independent group means, population standard deviations known independent group means, population standard deviations unknown matched or paired samples Question 10 1 pts of interest is whether the percent of managers...
Part 1: Create your own Hypothesis Test and Confidence Interval from 1 sample Using methods from chapter 8, test ONE claim about a population parameter by collecting your own data or using our class survey data. Include your written claim, hypothesis in both symbolic and written form, relevant statistics (such as sample means, proportions etc.), test statistic, p-value (or critical value), conclusion, and interpretation of your conclusion in the context of your claim. Use a 0.05 significance level. You will...
Step 2 of 4: Calculate the sample standard deviation of the
paired differences. Round your answer to six decimal places.
Step 3 of 4: Calculate the margin of error to be used in
constructing the confidence interval. Round your answer to six
decimal places.
Step 4 of 4: Construct the 90% confidence interval. Round your
answers to one decimal place
Given two dependent random samples with the following results: 31 18 32 20 17 32 Population 1 44 Population 2...
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