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A sample of 35 different payroll departments found that employees worked an average of 240.6 days a year. If the population standard deviation is 18.8 days, find the 90% confidence interval for the average number of days worked by all employees who are paid through payroll departments.
How many students weigh less than 128 pounds? b) how many students weigh more than 165 pounds? c)how many students weigh between 135 and 165 pounds?
1.according to recent reports 30 of americans are now classified as obese. a sample of 800 americans found that 278 of
Prove that if x + y is even, then the product xy(x + y)(x - y) is divisible by 24, and that without this restriction, 4xy(x- y)(x + y) is divisible by 24.
according to the sleep foundation the average nights sleep is 6.8 hours fortune march 20 2006. assume the standard
Waiting time at a bank drive-in widow the average waiting time at a drive-in window of local bank is 10.3 minutes,
A recent study of breast cancer revealed that 13% of the women in the sample used antibiotics more than 500 days in their lifetime.
using t test for significance of slope to determine whether the independent variable is a significant predictornbsp of
intelligence quotient iq in a certain population is normally distributed with a mean of 100 and standard deviation of
a lab is comparing a test drug to a standard drug that is useful to patients having high blood pressure. the standard
1.a set of ten cards consists of five red cards and five black cards. the cards are shuffled thoroughly and i am given
The following data set shows the amount of time consumers have to wait on hold, in minutes, before talking to a customer service representative. Compute by hand the mean and standard deviation
Quantitative Analysis (using the SPSS data set posted on Blackboard), Describe the characteristics of respondents (frequencies, descriptive ?statistics) and State null and alternative hypotheses
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