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The lifetime of a disposable water filter is normally distributed with mean m = 30 gallons and standard deviation s = 6 gallons. What is the probability that a filter selected at random will last from 36 to 42 gallons?
A South American custom candy producer wants to know if the mean daily consumption of regular sugar sweetened candy eaters is less than that of artificial sweetened candy eaters.
Two Sun City had a population of 15,000 in 1985. It was then that Two Sun’s population growth began to rise at a rate of 600 people every year. Based on this model, respond to the following
Suppose that the scores of architects on a particular creativity test are normally distributed. What percentage of architects have Z scores? a. above .10; b. below .10
The probability that a student passes a written test for a private pilot's license is 0.75. What is the probability that a student will fail the test on the first attempt and pass it on the second attempt?
q1. with random sampling there is homogeneity within a subgroup or stratum.a. judgmental b. simple c. clusterd.
Compute the Return to Risk Ratio (RRR). On the basis of the results of (A) - (C), which action should the vendor take - sell soft drinks or ice cream? Why?
you are told that the population of the scores of iq test takers is normally distributed has a population mean of 100
Determine the probability of a positive economic trend given an increasing employment. Are employment and economic trend independent?
Determine the probability that we would reject null hypothesis given that it is true?
Verify that middle class families allocate a statistically larger average amount on food than poor families using the firm's data. Use a 5% significance level in your verification.
as part of a studyinvestigators wanted to assess the accuracy of self reported smoking status. participants are asked
Use the sample results with a 0.05 significance level to test the claim that pulse rates of men have a standard deviation greater than 10 beats per minute.
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