µ = 725
σ = 60
a) Z=(X-µ)/σ= (639-725)/60=
-1.43
b) Z=(X-µ)/σ= (861-725)/60=
2.27
c) Z=(X-µ)/σ= (548-725)/60= -2.95
d) Z=(X-µ)/σ= (791-725)/60= 1.10
e) Z=(X-µ)/σ= (914-725)/60= 3.15
core or Assume the average price of a laptop computer is 5725 with a standard deviation...
Assume the average price of a laptop computer is $725 with a standard deviation of $65. The following data represent the prices of a sample of laptops at an electronics store. Calculate the z-score for each of the following prices a) S620 b) $897 d) $800 c) $539 e) 5963 a) The z-score of $620 is (Round to two decimal places as needed) b) The z-score of $897 is. (Round to two decimal places as needed.) c) The z-score of...
The average salary for a certain profession is $78,000. Assume that the standard deviation of such salaries is 32,000.Consider a random sample of 68 people in this profession and let x over bar x represent the mean salary for the sample. d. Find the z-score for the value x overbar x=69,500. z=_________(Round to two decimal places as needed.)
The average salary for a certain profession is$ 69,000. Assume that the standard deviation of such salaries is $ 39,500. Consider a random sample of 68 people in this profession and let x over bar x represent the mean salary for the sample. a. What is mu Subscript x over bar μx ? mu Subscript x over bar μx =________ b. What is sigma Subscript x over bar σx ? sigma Subscript x over bar σx =__________ (Round to...
The average salary for a certain profession is $75,500. Assume that the standard deviation of such salaries is $30,500. Consider a random sample of 71 people in this profession and let x over bar x represent the mean salary for the sample. a. What is mu Subscript x over barμ x ? mu Subscript x overbarμxequals=? b. What is sigma Subscript x over bar σ x? sigma Subscript x over bar σ x=________(Round to two decimal places as needed.) c....
need help The average price of a laptop is $982. Assume laptop prices are approximately normally distributed with a standard deviation of $100. The most expensive 15% of laptops cost less than what amount?
Consider a sample with a mean equal to 40 and a standard deviation equal to 12. Calculate the z-scores for the following values. a) 53 b) 68 c) 33 d) 9 (Round to two decimal places as needed.) a) The z-score of 53 is b) The z-score of 68 is (Round to two decimal places as needed.) c) The z-score of 33 is . (Round to two decimal places as needed.) (Round to two decimal places as needed.) d) The...
Consider a sample with a mean equal to 38 and a standard deviation equal to 12. Calculate the z-scores for the following values. a) 48 b) 62 c) 32 d) 12 a) The z-score of 48 is nothing. (Round to two decimal places as needed.) b) The z-score of 62 is nothing. (Round to two decimal places as needed.) c) The z-score of 32 is nothing. (Round to two decimal places as needed.) d) The z-score of 12 is
The average salary for a certain profession is $78,000.Assume that the standard deviation of such salaries is 32,000.Consider a random sample of 68 people in this profession and let x overbarx represent the mean salary for the sample. What is sigma Subscript x overbar σx? sigma Subscript x overbar σx=_______(Round to two decimal places as needed.)
The average salary for a certain profession is $78,000. Assume that the standard deviation of such salaries is 32,000.Consider a random sample of 68 people in this profession and let x over bar x represent the mean salary for the sample. e. Find Px>69,500. (Round to three decimal places as needed.)
The average math SAT score is 519 with a standard deviation of 112. A particular high school claims that its students have unusually high math SAT scores. A random sample of 45 students from this school was selected, and the mean math SAT score was 560. Is the high school justified in its claim? Explain answers is ( choose yes/or no) , because the z score ( which is? ) is ( choose, usual or not usual) since it (...