The following sample information is given concerning the ACT scores of high school seniors form two...
The following sample information is given concerning the ACT scores of high school seniors form two local schools.
|
School A |
School B |
|
= 12 |
= 15 |
|
= 25 |
= 23 |
|
= 19 |
= 13 |
At 95% confidence what is the marginal of error of the interval estimate for the difference between the two populations? Please keep three decimal points of your answer.
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The following sample information is given concerning the ACT
scores of high school seniors form two...
13. 10 pts. The following are the math SAT scores of 15 high school seniors from...
13. 10 pts. The following are the math SAT scores of 15 high school seniors from three different high schools. Apply the Kruskal-Wallis test to determine whether there is a difference in SAT scores between the three high schools using a 0.05: . School 1: 498, 582, 527, 480, 549 . School 2: 435, 360, 372, 413, 512 . School 3: 608, 515, 661, 637, 554
An SRS of 450 high school seniors gained an average of x = 20 points in...
An SRS of 450 high school seniors gained an average of x = 20 points in their second attempt at the SAT Mathematics exam. Assume that the change in score has a Normal distribution with standard deviation ơ 49. (a) Find a 95% confidence interval for the mean change in score μ in the population of all high school seniors. (Enter your answers rounded to two decimal places.) lower bound of confidence interval: upper bound of confidence interval: (b) What...
You want to estimate the mean SATM score for 250,000 high school seniors in California. Only abou...
You want to estimate the mean SATM score for 250,000 high school seniors in California. Only about 45% of California students take the SAT. These self-selected students are planning to attend college and are not representative of all California seniors. A simple random sample (SRS) of 500 California high school seniors is tested. The mean score of the sample is Y = 461 What could you say about the mean score, η = 508 in the population of all 250,000...
4. You want to estimate the mean SATM score for 250,000 high school seniors in California. Only a...
4. You want to estimate the mean SATM score for 250,000 high school seniors in California. Only about 45% of California students take the SAT. These self-selected students are planning to attend college and are not representative of all California seniors A simple random sample (SRS) of 500 California high school seniors is tested. The mean score of the sample is Y 461. What could you say about the mean score, n-508 in the population of all 250,000 seniors? Assume...
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An SRS of 380 high school seniors gained an average of ?¯=20.23 points in their second attempt at the SAT Mathematics exam. Assume that the change in score has a Normal distribution with standard deviation σ=47.28. We want to estimate the mean change in score ?μ in the population of all high school seniors. (a) Using the 68 – 95 – 99.7 Rule or the ?-table (Table A), give a 95% confidence interval (?,?) for ? based on this sample....
The ACT math scores of 15 high school seniors are listed below. 18, 15, 25, 24,...
The ACT math scores of 15 high school seniors are listed below. 18, 15, 25, 24, 21, 16, 12, 20, 19, 25, 28, 25, 25, 29, 28 What is the mean? Round your answer to 2 decimal places.) What is the median? What is the mode? Describe the approximate shape of the distribution. Select an answer
An SRS of 500 high school seniors gained an average of x 25 points in their...
An SRS of 500 high school seniors gained an average of x 25 points in their second attempt at the SAT Mathematics exam. Assume that the change in score has a Normal distribution with standard deviation ơ-54. (a) Find a 90% confidence interval for the mean change in score μ in the population of all high school seniors. (Enter your answers rounded to two decimal places.) lower bound of confidence interval: upper bound of confidence interval: (b) What is the...
989 The state test scores for 12 randomly selected high school seniors are shown on the...
989 The state test scores for 12 randomly selected high school seniors are shown on the right. Complete parts (a) through (c) below. Assume the population is normally distributed. 1424 695 725 623 1221 721 745 1442 837 544 947 (a) Find the sample mean. X= (Round to one decimal place as needed.) (b) Find the sample standard deviation. s= (Round to one decimal place as needed.) (c) Construct a 95% confidence interval for the population mean H. A 95%...
An SRS of 380 high school seniors gained an average of i -23.51 points in their...
An SRS of 380 high school seniors gained an average of i -23.51 points in their second attempt at the SAT Mathematics exam. Assume that the change in score has a Normal distribution with standard deviation σ 48.51, we want to estimate the mean change in score u in the population of all high school seniors. (a) Using the 68-95-99.7 Rule or the z-table (Table A), give a 95% confidence interval (a, b) for based on this sample. Enter your...
An SRS of 380 high school seniors gained an average of.... An SRS of 380 high...
An SRS of 380 high school seniors gained an average of....
An SRS of 380 high school seniors gained an average of -23.11 points in their second attempt at the SAT Mathematics exam. Assume that the change in score has a Normal distribution with standard deviation σ = 48.85. We want to estimate the mean change in score μ in the population of all high school seniors. (a) Using the 68-95-99.7 Rule or the z-table (Table A), give a 99.7%...
13. 10 pts. The following are the math SAT scores of 15 high school seniors from three different high schools. Apply the Kruskal-Wallis test to determine whether there is a difference in SAT scores between the three high schools using a 0.05: . School 1: 498, 582, 527, 480, 549 . School 2: 435, 360, 372, 413, 512 . School 3: 608, 515, 661, 637, 554
An SRS of 450 high school seniors gained an average of x = 20 points in their second attempt at the SAT Mathematics exam. Assume that the change in score has a Normal distribution with standard deviation ơ 49. (a) Find a 95% confidence interval for the mean change in score μ in the population of all high school seniors. (Enter your answers rounded to two decimal places.) lower bound of confidence interval: upper bound of confidence interval: (b) What...
You want to estimate the mean SATM score for 250,000 high school seniors in California. Only about 45% of California students take the SAT. These self-selected students are planning to attend college and are not representative of all California seniors. A simple random sample (SRS) of 500 California high school seniors is tested. The mean score of the sample is Y = 461 What could you say about the mean score, η = 508 in the population of all 250,000...
4. You want to estimate the mean SATM score for 250,000 high school seniors in California. Only about 45% of California students take the SAT. These self-selected students are planning to attend college and are not representative of all California seniors A simple random sample (SRS) of 500 California high school seniors is tested. The mean score of the sample is Y 461. What could you say about the mean score, n-508 in the population of all 250,000 seniors? Assume...
An SRS of 500 high school seniors gained an average of x 25 points in their second attempt at the SAT Mathematics exam. Assume that the change in score has a Normal distribution with standard deviation ơ-54. (a) Find a 90% confidence interval for the mean change in score μ in the population of all high school seniors. (Enter your answers rounded to two decimal places.) lower bound of confidence interval: upper bound of confidence interval: (b) What is the...
989 The state test scores for 12 randomly selected high school seniors are shown on the right. Complete parts (a) through (c) below. Assume the population is normally distributed. 1424 695 725 623 1221 721 745 1442 837 544 947 (a) Find the sample mean. X= (Round to one decimal place as needed.) (b) Find the sample standard deviation. s= (Round to one decimal place as needed.) (c) Construct a 95% confidence interval for the population mean H. A 95%...
An SRS of 380 high school seniors gained an average of i -23.51 points in their second attempt at the SAT Mathematics exam. Assume that the change in score has a Normal distribution with standard deviation σ 48.51, we want to estimate the mean change in score u in the population of all high school seniors. (a) Using the 68-95-99.7 Rule or the z-table (Table A), give a 95% confidence interval (a, b) for based on this sample. Enter your...
An SRS of 380 high school seniors gained an average of....
An SRS of 380 high school seniors gained an average of -23.11 points in their second attempt at the SAT Mathematics exam. Assume that the change in score has a Normal distribution with standard deviation σ = 48.85. We want to estimate the mean change in score μ in the population of all high school seniors. (a) Using the 68-95-99.7 Rule or the z-table (Table A), give a 99.7%...
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