a random sample of n1= 156 people ages 16 to 19 were taken from the island...

a random sample of n1= 156 people ages 16 to 19 were taken from the island of oahu, hawaii, and 16 were found to be high school dropouts. Another random sample of n2=129 people ages 16 to 19 werr taken from sweetwater county, Wyoming, and 10 were found to be high school dropouts. Do these data indicate that the population proportion of high school dropouts on Oahu is different ( either way) from that of sweetwater county? use a 1% level of significance.

what is the value of the sample test statistic? ( Test the difference p1-p2. Do not use rounded values. Round your final answer to two decimal places.)

find (or estimate) the p-value. (Round your answer to fout fecimal places)

Expert Solution

orchestra answered 2 years ago

In a random sample of n1 = 156 male Statistics students, there are x1 = 81...

In a random sample of n1 = 156 male Statistics students, there are x1 = 81 underclassmen. In a random sample of n2 = 320 female Statistics students, there are x2 = 221 underclassmen. The researcher would like to test the hypothesis that the percent of males who are underclassmen stats students is less than the percent of females who are underclassmen stats students. What is the value of the test statistic? What is the p-value for the test of...

A random sample of size n1 = 16 is selected from a normal population with a...

A random sample of size n1 = 16 is selected from a normal population with a mean of 74 and a standard deviation of 9. A second random sample of size n2 = 7 is taken from another normal population with mean 68 and standard deviation 11. Let X1and X2 be the two sample means. Find: (a) The probability that X1-X2 exceeds 4. (b) The probability that 4.8 ≤X1-X2≤ 5.6. Round your answers to two decimal places (e.g. 98.76).

A random sample of n1 = 261 people who live in a city were selected and...

A random sample of n1 = 261 people who live in a city were selected and 77 identified as a "dog person." A random sample of n2 = 101 people who live in a rural area were selected and 52 identified as a "dog person." Find the 95% confidence interval for the difference in the proportion of people that live in a city who identify as a "dog person" and the proportion of people that live in a rural area...

Exhibit 9-6. a random sample of 100 people were taken. Eighty of the people in the...

Exhibit 9-6. a random sample of 100 people were taken. Eighty of the people in the sample favored candidate A. We are interested in determining whether or not the proportion of the population in favor of candidate A is significantly more than 75%. At a 0.05 level of significance it can be concluded that the proportion of the population in favor of candidate A is ____? Is it significantly greater than 75%, not significantly greater than 75%, significantly greater than...

In a random sample 100 people ages 20 to 24, 25% said they were smokers. In...

In a random sample 100 people ages 20 to 24, 25% said they were smokers. In a random sample of 300 people ages 25 to 29, 51 of them said they were smokers. Test the claim that the proportion of smokers in the two age groups is the same. Use a significance level of 0.05. Provide the following. a. the null and alternative hypothesis b. the test statistic c. the p-value d. the final conclusion in nontechnical terms e. construct...

Independent random samples of sizes n1 = 307 and n2 = 309 were taken from two...

Independent random samples of sizes n1 = 307 and n2 = 309 were taken from two populations. In the first sample, 92 of the individuals met a certain criteria whereas in the second sample, 108 of the individuals met the same criteria. Test the null hypothesis H0:p1=p2versus the alternative hypothesis HA:p1<p2. a) Calculate the z test statistic, testing the null hypothesis that the population proportions are equal. Round your response to at least 3 decimal places. b) What is the...

Q2) Independent random samples of sizes n1 = 208 and n2 = 209 were taken from...

Q2) Independent random samples of sizes n1 = 208 and n2 = 209 were taken from two populations. In the first sample, 172 of the individuals met a certain criteria whereas in the second sample, 181 of the individuals met the same criteria. Test the null hypothesis H0:p1=p2versus the alternative hypothesis HA:p1>p2. a) Calculate the z test statistic, testing the null hypothesis that the population proportions are equal. Round your response to at least 2 decimal places. b) What is...

(S 11.1) Random samples of sizes n1 = 404 and n2 = 310 were taken from...

(S 11.1) Random samples of sizes n1 = 404 and n2 = 310 were taken from two independent populations. In the first sample, 107 of the individuals met a certain criteria whereas in the second sample, 135 of the individuals met the same criteria. Run a 2PropZtest to test whether the proportions are different, and answer the following questions. What is the value of p?, the pooled sample proportion?Round your response to at least 3 decimal places. Calculate the z...

Independent random samples of sizes n1 = 202 and n2 = 210 were taken from two...

Independent random samples of sizes n1 = 202 and n2 = 210 were taken from two populations. In the first sample, 170 of the individuals met a certain criteria whereas in the second sample, 178 of the individuals met the same criteria. Test the null hypothesis H0:p1=p2versus the alternative hypothesis HA:p1>p2. a) Calculate the z test statistic, testing the null hypothesis that the population proportions are equal. Round your response to at least 3 decimal places. b) What is the...

In a different shelter, a random sample of dogs’ ages was taken and the sample mean...

In a different shelter, a random sample of dogs’ ages was taken and the sample mean was χ = 7.4 years. The standard deviation for the sample was 2.53 years. At α = 0.05 , test the claim that there is a difference between the ages of dogs at the two pet shelters.

Question