In this exercise we are interested in comparing the proportion of those who support immigrant policy...

In this exercise we are interested in comparing the proportion of those who support immigrant policy reform among Hispanics and non-Hispanics. A poll found that out of 800 Hispanics 77% supported immigration reform and out of 900 non-Hispanics 64% supported immigration reform. Test the hypothesis that Hispanics are more likely to support immigration reform than non-Hispanics at alpha = 0.01.

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orchestra answered 2 years ago

A study is run comparing HDL cholesterol levels between men who exercise regularly and those who...

A study is run comparing HDL cholesterol levels between men who exercise regularly and those who do not. The data are shown below. Regular Exercise N Mean Std Dev Yes 35 48.5 12.5 No 120 56.9 11.9 Generate a 95% confidence interval for the difference in mean HDL levels between men who exercise regularly and those who do not.

We are interested to estimate the proportion of the population who favor a candidate. Suppose that...

We are interested to estimate the proportion of the population who favor a candidate. Suppose that 210 of the people in a sample of 500 favored the candidate. (a) What is the proportion estimate, p-hat, and the standard error? (b) Find the 90% confidence interval for the proportion of the population who favor the candidate. Interpret result.

We are interested in comparing the percentage of females versus males who feel they are overweight....

We are interested in comparing the percentage of females versus males who feel they are overweight. The following data was collected: What is the 95% confidence interval for the difference in proportion between women and men? What is the test statistic? Male or Female Total Surveyed Number who feel they are overweight Female 146 32 Male 84 15

1. We are interested in estimating the proportion of students at a university who smoke. Out...

1. We are interested in estimating the proportion of students at a university who smoke. Out of a random sample of 200 students from this university, 40 students smoke. (1) Calculate a 95% confidence interval for the proportion of students at this university who smoke and interpret this interval in context. (2) If we wanted the margin of error to be no larger than 2% at a 95% confidence level for the proportion of students who smoke, how big of...

We are interested in estimating the proportion of graduates at a mid-sized university who found a...

We are interested in estimating the proportion of graduates at a mid-sized university who found a job within one year of completing their undergraduate degree. We can do so by creating a 95% confidence interval for the true proportion p. Suppose we conduct a survey and find out that 340 of the 430 randomly sampled graduates found jobs within one year. Assume that the size of the population of graduates at this university is large enough so that all our...

We are interested in estimating the proportion of graduates from Lancaster University who found a job...

We are interested in estimating the proportion of graduates from Lancaster University who found a job within one year of completing their undergraduate degree. Suppose we conduct a survey and find out that 354 of the 400 randomly sampled graduates found jobs. The number of students graduating that year was over 4000. (a) State the central limit theorem. (b) Why is the central limit theorem useful? (c) What is the population parameter of interest? What is the point estimate of...

Researchers are comparing the proportion of University Park students who are Pennsylvania residents to the proportion...

Researchers are comparing the proportion of University Park students who are Pennsylvania residents to the proportion of World Campus students who are Pennsylvania residents. Data from a sample are presented in the contingency table below. Primary Campus Total University Park World Campus Pennsylvania Resident Yes 115 70 185 No 86 104 190 Total 201 174 375 Construct a 95% confidence interval to estimate the difference between the proportion of all University Park students who are Pennsylvania residents and the proportion...

A study is run comparing HDL cholesterol levels between persons who exercise regularly and those who do not. The data are shown below in Table 1.

A study is run comparing HDL cholesterol levels between persons who exercise regularly and those who do not. The data are shown below in Table 1. Table: Mean HDL Cholesterol Levels by Regular Exercise Group n Mean Std Dev No Regular Exercise 8 55 11.9 Regular Exercise 8 45 12.1 Is the mean HDL cholesterol levels in the group with “no regular exercise” statistically greater than those who exercise regularly at an a=.05? Sp=12 Generate a 95% confidence interval...

Suppose we are interested in the proportion of nursing majors at a university, and we take...

Suppose we are interested in the proportion of nursing majors at a university, and we take a random sample of 150 students to estimate the percent of students in our class who are nursing majors. What is the population? What is the sample? What is the variable? Is the variable qualitative or quantitative?

Comparing two population proportions. We expect that there is no difference in proportion of status of...

Comparing two population proportions. We expect that there is no difference in proportion of status of employment between male and female recent business graduates. a) insert a frequency table and a bar chart or a pie chart labeled properly. USING EXCEL b) Perform hypothesis test: Calculate the P-value and make the conclusion (reject or fail to reject Ho). Insert Excel software output. C) Calculate the corresponding confidence interval and check if the conclusion is the same Status Gender Part-time F...

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