At Western University, the historical mean of scholarship examination scores for freshman applications is 900. A...
At Western University, the historical mean of scholarship examination scores for freshman applications is 900. A historical population standard deviation σ = 180 is assumed known. Each year, the assistant dean uses a sample of applications to determine whether the mean examination score for the new freshman applications has changed.
State the hypotheses.
What is the 95% confidence interval estimate of the population mean examination score if a sample of 200 applications provided a sample mean x bar = 935?
Use the confidence interval to conduct a hypothesis test. Using ɑ = .05, what is your conclusion?
What is the p-value?
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At Western University, the historical mean of scholarship
examination scores for freshman applications is 900. A...
At Western University the historical mean of scholarship examination scores for freshman applications is 910. A...
At Western University the historical mean of scholarship examination scores for freshman applications is 910. A historical population standard deviation = 190 is assumed known. Each year, the assistant dean uses a sample of applications to determine whether the mean examination score for the new freshman applications has changed. a. State the hypotheses. b. What is the 95% confidence interval estimate of the population mean examination score if a sample of 200 applications provided a sample mean = 935 (to the nearest whole...
At Western University the historical mean of scholarship examination scores for freshman applications is 920. A...
At Western University the historical mean of scholarship examination scores for freshman applications is 920. A historical population standard deviation o = 180 is assumed known. Each year, the assistant dean uses a sample of applications to determine whether the mean examination score for the new freshman applications has changed. a. State the hypotheses. Ho: u Select Ha: u Select b. What is the 95% confidence interval estimate of the population mean examination score if a sample of 200 applications...
At Western University the historical mean of scholarship examination scores for freshman applications is 900
At Western University the historical mean of scholarship examination scores for freshman applications is 900. A historical population standard deviation o = 180 is assumed known. Each year, the assistant dean uses a sample of applications to determine whether the mean examination score for the new freshman applications has changed.
- At Western University the historical mean of scholarship examination scores for freshman applications is 900....
- At Western University the historical mean of scholarship examination scores for freshman applications is 900. Each year the assistant dean uses a sample of applications to determine whether the mean examination score for new freshman applications has changed. (a) What hypotheses is the assistant dean testing each year? (b) This year for a sample of 75 freshman, the dean finds the sample average examination score to be 875. The dean also knows that 0 = 100. What is the...
At Southern University the historical mean of scholarship examination scores for freshman applications is 900. A...
At Southern University the historical mean of scholarship
examination scores for freshman applications is 900. A historical
population standard deviation of ? = 100 is assumed known. Each
year, the assistant dean uses a sample of applications to determine
whether the mean examination score for the new freshman
applications has changed. A sample of 100 applications provided a
sample mean of 890. Perform the appropriate hypothesis test using ?
= 0.05.
Steps for the Z test for M. (Section 9.3)...
(4)Five hundred students from a local high school took a college entrance examination. Historical data from the school record show that the standard deviation of test scores is 40. A random sampl...
(4)Five hundred students from a local high school took a college entrance examination. Historical data from the school record show that the standard deviation of test scores is 40. A random sample of thirty- six students is taken from the entire population of 500 students. The mean test score for the sample is three hundred eighty. Find (a) 95% confidence interval for the unknown population mean test score. (b) 95% confidence interval for the unknown population mean test score if...
The scores on an examination in biology are approximately normally distributed with mean 500 and an...
The scores on an examination in biology are approximately normally distributed with mean 500 and an unknown standard deviation. The following is a random sample of scores from this examination. 419, 455, 479, 535, 540, 607 Find a 99% confidence interval for the population standard deviation. Then complete the table below. Carry your intermediate computations to at least three decimal places. Round your answers to at least two decimal places (If necessary, consult a list of formulas-) What is the...
It is reported that the ACT scores of freshman students at NMSU is approximately Normally distributed,...
It is reported that the ACT scores of freshman students at NMSU is approximately Normally distributed, with mean of 20.5 and standard deviation of 5.1. (1) (3pts) If the university decides to offer a scholarship to the top 2% of students, how high does a student need to score on ACT test to qualify for that scholarship? (No points will be given without proper steps) (2) (3pts) A math class has 20 freshmen enrolled. If we assume the 20 freshmen...
A local university administers a comprehensive examination to the candidates for B.S. degrees in Business Administration....
A local university administers a comprehensive examination to the candidates for B.S. degrees in Business Administration. Five examinations are selected at random and scored. The scores are shown below. Scores 80 90 91 62 77 a. b. Compute the mean and the standard deviation of the sample. Compute the margin of error at 95% confidence. Assume the population is normally distributed. Develop a 95% confidence interval estimate for the mean of the population. c.
please help thank you in advance It is reported that the ACT scores of freshman students...
please help thank you in advance
It is reported that the ACT scores of freshman students at NMSU is approximately Normally distributed, with mean of 21.1 and standard deviation of 4.5. (1) (3pts) If the university decides to offer a scholarship to the top 3% of students, how high does a student need to score on ACT test to qualify for that scholarship? (No points will be given without proper steps) (2)(3pts) A math class has 30 freshmen enrolled. If...
At Western University the historical mean of scholarship examination scores for freshman applications is 920. A historical population standard deviation o = 180 is assumed known. Each year, the assistant dean uses a sample of applications to determine whether the mean examination score for the new freshman applications has changed. a. State the hypotheses. Ho: u Select Ha: u Select b. What is the 95% confidence interval estimate of the population mean examination score if a sample of 200 applications...
At Western University the historical mean of scholarship examination scores for freshman applications is 900. A historical population standard deviation o = 180 is assumed known. Each year, the assistant dean uses a sample of applications to determine whether the mean examination score for the new freshman applications has changed.
- At Western University the historical mean of scholarship examination scores for freshman applications is 900. Each year the assistant dean uses a sample of applications to determine whether the mean examination score for new freshman applications has changed. (a) What hypotheses is the assistant dean testing each year? (b) This year for a sample of 75 freshman, the dean finds the sample average examination score to be 875. The dean also knows that 0 = 100. What is the...
At Southern University the historical mean of scholarship
examination scores for freshman applications is 900. A historical
population standard deviation of ? = 100 is assumed known. Each
year, the assistant dean uses a sample of applications to determine
whether the mean examination score for the new freshman
applications has changed. A sample of 100 applications provided a
sample mean of 890. Perform the appropriate hypothesis test using ?
= 0.05.
Steps for the Z test for M. (Section 9.3)...
(4)Five hundred students from a local high school took a college entrance examination. Historical data from the school record show that the standard deviation of test scores is 40. A random sample of thirty- six students is taken from the entire population of 500 students. The mean test score for the sample is three hundred eighty. Find (a) 95% confidence interval for the unknown population mean test score. (b) 95% confidence interval for the unknown population mean test score if...
The scores on an examination in biology are approximately normally distributed with mean 500 and an unknown standard deviation. The following is a random sample of scores from this examination. 419, 455, 479, 535, 540, 607 Find a 99% confidence interval for the population standard deviation. Then complete the table below. Carry your intermediate computations to at least three decimal places. Round your answers to at least two decimal places (If necessary, consult a list of formulas-) What is the...
It is reported that the ACT scores of freshman students at NMSU is approximately Normally distributed, with mean of 20.5 and standard deviation of 5.1. (1) (3pts) If the university decides to offer a scholarship to the top 2% of students, how high does a student need to score on ACT test to qualify for that scholarship? (No points will be given without proper steps) (2) (3pts) A math class has 20 freshmen enrolled. If we assume the 20 freshmen...
A local university administers a comprehensive examination to the candidates for B.S. degrees in Business Administration. Five examinations are selected at random and scored. The scores are shown below. Scores 80 90 91 62 77 a. b. Compute the mean and the standard deviation of the sample. Compute the margin of error at 95% confidence. Assume the population is normally distributed. Develop a 95% confidence interval estimate for the mean of the population. c.
please help thank you in advance
It is reported that the ACT scores of freshman students at NMSU is approximately Normally distributed, with mean of 21.1 and standard deviation of 4.5. (1) (3pts) If the university decides to offer a scholarship to the top 3% of students, how high does a student need to score on ACT test to qualify for that scholarship? (No points will be given without proper steps) (2)(3pts) A math class has 30 freshmen enrolled. If...
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