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1. A random sample of 16 size D batteries for cars yield a mean of 2.8 hours with standard deviation, 1.3 hours.
(a) Find the critical value, t*, for a 99% CI. t* =
(b) Find the margin of error for a 99% CI.
2. Dave thinks a certain potato chip maker is putting fewer chips in their regular bags of chips. From a random sample of 23 bags of potato chips he calculated a P value of 0.141 for the sample.
(a) At a 5% level of significance, is there evidence that Dave is correct?
(b) At a 10% level of significance, is there evidence that he is correct?
Election-day polls are taken from voting precincts selected because they are believed to be representative of all voters.
if a player rolls two dice and get a sum of 3 and 11 she wins 30. if the person gets 7 she wins 15. the cost to play
Find out a 95 percent confidence interval for population mean.
A survey of n = 703 randomly selected workers showed that 61% of those respondents found their jobs through networking.
The probability density of the net weight in ounces of a packaged compound is f(x)=2.0 for 19.75
Assume the arrival of these emails i3 approximated by the Poisson distribution.
According to an Internet posting, 80% of adults enjoy drinking beer. If a group of 3 adults is selected at random, find the probability that none of them enjoy drinking beer.
Assume you always reject null hypothesis, regardless of any sample evidence. Determine the probabiliyt of Type II error? P(Type II error).
suppose that contamination particle size in micrometers canbe modeled as fx 2x-3nbspfor 1ltx and fx 0 for xlt 1a
you have a 20 sided die that you roll an infinite number of times.what is the probability of rolling any number between
Please show work and provide excel formulas for plots so that I can understand how to do the assignment. The density function of a continuous random variable X, the total number of hours, in units of 100 hours, that a family runs a vacuum cleaner ove..
The researcher estimated that out of the 100 students at least 50% of the students would be exposed to movies and TV w/ crude humor at least 2-4 times per week.
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