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A random sample of 16 graduates of a certain secretarial school typed an average of 76.1...
A random sample of 18 graduates of a certain secretarial school typed an average of 80.2...
A random sample of 18 graduates of a certain secretarial school typed an average of 80.2 words per minute with a standard deviation of 7.9 words per minute. Assuming a normal distribution for the number of words typed per minute, find a 99% confidence interval for the average number of words typed by all graduates of this school. Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal...
2. A random sample of 100 graduates of a certain secretarial school typed an average of...
2. A random sample of 100 graduates of a certain secretarial school typed an average of 90 words per minute with a sample standard deviation (s) of 10 words per minute. We assume a normal distribution for the number of words typed per minute. (a) (4pts) Find a 95% confidence interval for the average number of words t yped per minute of all graduates of this school. (b) (3pts) Suppose the population standard deviation (o) is exactly 10 words per...
A random sample of 16 graduates of a certain secretarial school typed an average of 85...
A random sample of 16 graduates of a certain secretarial school typed an average of 85 words per minute with a standard deviation of 8 words per minute. Assume that the number of words typed per minute of a randomly selected graduates follows a normal distribution . 1. Construct a 95% confidence interval to estimate the average number of words typed by all graduates of this school. Remember to state the assumptions and interpret the result. Following R commands may...
For Problem 1 and 2: A random sample of 16 graduates of a certain secretarial school...
For Problem 1 and 2: A random sample of 16 graduates of a certain secretarial school typed an average of 85 words per minute with a standard deviation of 8 words per minute. Assume that the number of words typed per minute of a randomly selected graduates follows a normal distribution 1. (4 pts) a 95% confidence interval to estimate the average number of words typed by all graduates of this school. Remember to state the assumptions and interpret the...
Salaries of 35 college graduates who took a statistics course in college have a mean, x,...
Salaries of 35 college graduates who took a statistics course in college have a mean, x, of $61,500. Assuming a standard deviation, ?' of $14,440, construct a 99% confidence interval for estimating the population mean ?. Click here to view a t distribution table Click here to view page 1 of the standard normal distribution table Click here to view page 2 of the standard normal distribution table. $LI < ?«SLI (Round to the nearest integer as needed.)
7.3.25 Question Help Salaries of 36 college graduates who took a statistics course in college have...
7.3.25 Question Help Salaries of 36 college graduates who took a statistics course in college have a mean, x of $68,900. Assuming a standard deviation o, of $17,215, construct a 99% confidence interval for estimating the population mean μ Click here to view a t distribution table Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table < μ<S| | (Round to the nearest integer as...
Salaries of 47 college graduates who took a statistics course in college have a mean, x,...
Salaries of 47 college graduates who took a statistics course in college have a mean, x, of $62,500. Assuming a standard deviation, o, of $18,547, construct a 99% confidence interval for estimating the population mean . Click here to view at distribution table. Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table. $ <u<$ (Round to the nearest integer as needed.)
Salaries of 36 college graduates who took a statistics course in college have a mean, X,...
Salaries of 36 college graduates who took a statistics course in college have a mean, X, of $61,700. Assuming a standard deviation, o, of $11,798, construct a 99% confidence interval for estimating the population mean . Click here to view at distribution table. Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table. ${<u<$ (Round to the nearest integer as needed.)
Salaries of 37 college graduates who took a statistics course in college have a mean, x,...
Salaries of 37 college graduates who took a statistics course in college have a mean, x, of $67,500. Assuming a standard deviation, o, of $15,534, construct a 99% confidence interval for estimating the population mean u. Click here to view at distribution table. Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table. $ <u<$ (Round to the nearest integer as needed.)
Salaries of 47 college graduates who took a statistics course in college have a mean, x,...
Salaries of 47 college graduates who took a statistics course in college have a mean, x, of $63,300. Assuming a standard deviation, o, of $16,180, construct a 99% confidence interval for estimating the population mean u. Click here to view at distribution table. Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table. $ <u<$ (Round to the nearest integer as needed.)
A random sample of 18 graduates of a certain secretarial school typed an average of 80.2 words per minute with a standard deviation of 7.9 words per minute. Assuming a normal distribution for the number of words typed per minute, find a 99% confidence interval for the average number of words typed by all graduates of this school. Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal...
2. A random sample of 100 graduates of a certain secretarial school typed an average of 90 words per minute with a sample standard deviation (s) of 10 words per minute. We assume a normal distribution for the number of words typed per minute. (a) (4pts) Find a 95% confidence interval for the average number of words t yped per minute of all graduates of this school. (b) (3pts) Suppose the population standard deviation (o) is exactly 10 words per...
For Problem 1 and 2: A random sample of 16 graduates of a certain secretarial school typed an average of 85 words per minute with a standard deviation of 8 words per minute. Assume that the number of words typed per minute of a randomly selected graduates follows a normal distribution 1. (4 pts) a 95% confidence interval to estimate the average number of words typed by all graduates of this school. Remember to state the assumptions and interpret the...
Salaries of 35 college graduates who took a statistics course in college have a mean, x, of $61,500. Assuming a standard deviation, ?' of $14,440, construct a 99% confidence interval for estimating the population mean ?. Click here to view a t distribution table Click here to view page 1 of the standard normal distribution table Click here to view page 2 of the standard normal distribution table. $LI < ?«SLI (Round to the nearest integer as needed.)
7.3.25 Question Help Salaries of 36 college graduates who took a statistics course in college have a mean, x of $68,900. Assuming a standard deviation o, of $17,215, construct a 99% confidence interval for estimating the population mean μ Click here to view a t distribution table Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table < μ<S| | (Round to the nearest integer as...
Salaries of 47 college graduates who took a statistics course in college have a mean, x, of $62,500. Assuming a standard deviation, o, of $18,547, construct a 99% confidence interval for estimating the population mean . Click here to view at distribution table. Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table. $ <u<$ (Round to the nearest integer as needed.)
Salaries of 36 college graduates who took a statistics course in college have a mean, X, of $61,700. Assuming a standard deviation, o, of $11,798, construct a 99% confidence interval for estimating the population mean . Click here to view at distribution table. Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table. ${<u<$ (Round to the nearest integer as needed.)
Salaries of 37 college graduates who took a statistics course in college have a mean, x, of $67,500. Assuming a standard deviation, o, of $15,534, construct a 99% confidence interval for estimating the population mean u. Click here to view at distribution table. Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table. $ <u<$ (Round to the nearest integer as needed.)
Salaries of 47 college graduates who took a statistics course in college have a mean, x, of $63,300. Assuming a standard deviation, o, of $16,180, construct a 99% confidence interval for estimating the population mean u. Click here to view at distribution table. Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table. $ <u<$ (Round to the nearest integer as needed.)
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