The mean preparation fee H&R Block charged retail customers last year was $183. Use this price...
The mean preparation fee H&R Block charged retail customers last year was $183. Use this price as the population mean and assume the population standard deviation of preparation fees is $50.
What is the probability that the mean price for a sample of 30 H&R Block retail customers is within $8 of the population mean? (Round to four decimal places) Answer
What is the probability that the mean price for a sample of 50 H&R Block retail customers is within $8 of the population mean? (Round to four decimal places) Answer
What is the probability that the mean price for a sample of 100 H&R Block retail customers is within $8 of the population mean? (Round to four decimal places)
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The mean preparation fee H&R Block charged retail customers
last year was $183. Use this price...
29. The mean preparation fee H&R Block charged retail customers last year was $183 (The Wall...
29. The mean preparation fee H&R Block charged retail customers last year was $183 (The Wall Street Journal, March 7, 2012). Use this price as the population mean and assume the population standard deviation of preparation fees is $50. a. What is the probability that the mean price for a sample of 30 H&R Block retail b. What is the probability that the mean price for a sample of 50 H&R Block retail c. What is the probability that the...
The mean preparation fee H&R Block charged retail customers was $183 (The Wall Street Journal, March,...
The mean preparation fee H&R Block charged retail customers was $183 (The Wall Street Journal, March, 2012). Use this price as population mean deviation of preparation fee is $50 and assume the population standard a. What is the probability that the mean price for a sample of 1 within S8 of the population mean? 00 H&R Block retail customers is b. What is the probability that the mean price for a sample of 100 H&R Block retail customers is more...
The College Board reported the following mean scores for the three parts of the SAT (The...
The College Board reported the following mean scores for the three parts of the SAT (The World Almanac, 2009): Critical Reading 502 Mathematics 515 Writing 494 Assume that the population standard deviation on each part of the test is σ = 100. What is the probability a sample of 90 test takers will provide a sample mean test score within 10 points of the population mean of 502 on the Critical Reading part of the test? (Round to four decimal...
According to a certain organization, adults worked an average of 1,792 hours last year. Assume the...
According to a certain organization, adults worked an average of 1,792 hours last year. Assume the population standard deviation is 410 hours and that a random sample of 50 adults was selected. Complete parts a through e below. O = 57.98 (Round to two decimal places as needed.) b. What is the probability that the sample mean will be more than 1,820 hours? P(X>1,820) = .3146 (Round to four decimal places as needed.) c. What is the probability that the...
A population has a mean of 400 and a standard deviation of 50. Suppose a sample...
A population has a mean of 400 and a standard deviation of 50. Suppose a sample of size 100 is selected and I is used to estimate u. Use z-table. a. What is the probability that the sample mean will be within +9 of the population mean (to 4 decimals)? b. What is the probability that the sample mean will be within +13 of the population mean (to 4 decimals)? A population proportion is 0.3. A sample of size 300...
The Economic Policy Institute periodically issues reports on wages of entry-level workers. The institute reported that...
The Economic Policy Institute periodically issues reports on wages of entry-level workers. The institute reported that entry-level wages for male college graduates were $21.68 per hour and for female college graduates were $18.80 per hour in 2011 (Economic Policy Institute website, March 30, 2012). Assume the standard deviation for male graduates is $2.30, and for female graduates it is $2.05. What is the probability that a sample of 50 male graduates will provide a sample mean within $.50 of the...
Barron's reported that the average number of weeks an individual is unemployed is 17.5 weeks. Assume...
Barron's reported that the average number of weeks an individual is unemployed is 17.5 weeks. Assume that for the population of all unemployed individuals the population mean length of unemployment is 17.5 and that the population standard deviation is 4 weeks. Suppose you would like to select a sample of 50 unemployed individuals for a follow-up study. What is the probability that a simple random sample of 50 unemployed individuals will provide a sample mean within 1 week of the...
Suppose that a random sample of size 64 is to be selected from a population with mean 40 and standard deviation 5.
Suppose that a random sample of size 64 is to be selected from a population with mean 40 and standard deviation 5. (a) What are the mean and standard deviation of the sampling distribution? (b) What is the approximate probability that will be within 0.3 of the population mean u? (Round your answer to four decimal places.) (c) What is the approximate probability that will differ from u by more than 0.7? (Round your answer to four decimal places.)
According to a research institution, the average hotel price in a certain year was $105.12. Assume...
According to a research institution, the average hotel price in a certain year was $105.12. Assume the population standard deviation is $20.00 and that a random sample of 32 hotels was selected. Complete parts a through d below. a. Calculate the standard error of the mean. (Round to two decimal places as needed.) b. What is the probability that the sample mean will be less than $106? P(x<$106) (Round to four decimal places as needed.) c. What is the probability...
According to a research institution, the average hotel price in a certain year was $100 21...
According to a research institution, the average hotel price in a certain year was $100 21 Assume the population standard deviation is $17 00 and that a random sample of 4 hotels was selected Complete parts a through d befow a, calculate the standard error of the mean Round to two decimal places as needed ) b. What is the probability that the sample mean will be less than $1027 X < $102) : (Round to four decimal places as...
29. The mean preparation fee H&R Block charged retail customers last year was $183 (The Wall Street Journal, March 7, 2012). Use this price as the population mean and assume the population standard deviation of preparation fees is $50. a. What is the probability that the mean price for a sample of 30 H&R Block retail b. What is the probability that the mean price for a sample of 50 H&R Block retail c. What is the probability that the...
The mean preparation fee H&R Block charged retail customers was $183 (The Wall Street Journal, March, 2012). Use this price as population mean deviation of preparation fee is $50 and assume the population standard a. What is the probability that the mean price for a sample of 1 within S8 of the population mean? 00 H&R Block retail customers is b. What is the probability that the mean price for a sample of 100 H&R Block retail customers is more...
According to a certain organization, adults worked an average of 1,792 hours last year. Assume the population standard deviation is 410 hours and that a random sample of 50 adults was selected. Complete parts a through e below. O = 57.98 (Round to two decimal places as needed.) b. What is the probability that the sample mean will be more than 1,820 hours? P(X>1,820) = .3146 (Round to four decimal places as needed.) c. What is the probability that the...
A population has a mean of 400 and a standard deviation of 50. Suppose a sample of size 100 is selected and I is used to estimate u. Use z-table. a. What is the probability that the sample mean will be within +9 of the population mean (to 4 decimals)? b. What is the probability that the sample mean will be within +13 of the population mean (to 4 decimals)? A population proportion is 0.3. A sample of size 300...
According to a research institution, the average hotel price in a certain year was $105.12. Assume the population standard deviation is $20.00 and that a random sample of 32 hotels was selected. Complete parts a through d below. a. Calculate the standard error of the mean. (Round to two decimal places as needed.) b. What is the probability that the sample mean will be less than $106? P(x<$106) (Round to four decimal places as needed.) c. What is the probability...
According to a research institution, the average hotel price in a certain year was $100 21 Assume the population standard deviation is $17 00 and that a random sample of 4 hotels was selected Complete parts a through d befow a, calculate the standard error of the mean Round to two decimal places as needed ) b. What is the probability that the sample mean will be less than $1027 X < $102) : (Round to four decimal places as...
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