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The weight of a product is measured in pounds. A sample of 64 units is taken from a batch. The sample yielded the following results: = 80 lbs. and s =12 lbs. Calculate a 99 percent confidence interval for the mean.
assume the random variable x is normally distributed with mean u50 and standard deviation o7. compute pxgt37
Construct a 89% confidence interval estimate of the overall percentage of the B.C. population in favour of such a casino and what size of sample would be required to do this
one of the games in the texas lottery is to pay 1 to select a 3-digit number. every wednesday evening the lottery
What is the probability that four rolls of the dice total exactly 19? What is the probability of totaling exactly 19 if we know that one die came up 1?
Ophelia O'Brien, VP of Consumer Credit of American First Banks (AFB), monitors the default rate on personal loans at the AFB member banks.
the following data show the number of fruit fly killed at varying concentrations of nicotine.the number of ies killed
Would a 90% confidence interval be wider or narrower than the one that you found in that exercise? Verify your answer by computing the interval.
Tyrion, Cersei, and ten other people are sitting at a round table, with their seating arrangement having been randomly assigned.
The sample data are summarized by the statistics n = 27, x = 4.6 years, s- 1.9 years.
How many seats sould be in the non-smoking area in order to be very sure (mean+3StandardDeviation) of having enough seating there?
Suppose that 40% of participants consume caffeine and smoke. If 8 participants are evaluated, what is the probability that: Exactly half of them consume caffeine and smoke?
A battery manufacturer looks at samples of 30 batteries at the end of every day of production and notes the number of defective batteries.
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