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Suppose N=90,000, n=18,000, s=50
a. Compute the standard error of xbar using the finite population correction factor.
b. Repeat part a assuming n=36,000
c. Repeat part a assuming n= 90,000
Construct a 90% confidence interval to estimate the difference of (average number of gallons sold on weekdays - average number of gallons sold on weekends). Assume the population standard deviations are the same for both weekdays and weekends.
Assume your statistics professor reports test grades as z-scores, and you got a score of 2.20 on the midterm exam. Write down a sentence explaining what that means.
What proportion of children 10-15 years would be classified as hyperlipidemia(assume that hyperlipidemia is defined as a total cholesterol level over 200)?
Test the mean cholesterol content in the egg is greater than 2.5 percent
q1. consider throwing 2 usual dice. in each play we observe the number of dots that stay on top sum the returned result
Your company sells exercise clothing and equipment on the internet. To design the clothing, you collect data on the physical characteristics of your different types of customers.
Each patient also submits the blood sample and their glucose tolerance status is determined. Determine the sensitivity of screening test?
Suppose a population proportion is .40, and 80% of the time when you draw a random sample from this population you get the sample proportion of .35 or more.
A snack company distributes chips in bags labeled 6 ounces. The local Bureau of Weights and Measures randomly selects 50 bags of chips and obtains a sample mean of 5.9 ounces.
The personnel office at a large electronics firm regularly schedules job interviews and maintains records of the interviews. From the past records
A person is considering purchasing the stock of two home health companies that are similar in all respects except the proportion of earnings paid out as dividends.
in answering a question on a multiple-choice test a student either knows the answer or guesses. let p be the
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