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Assuming we know σ = 5.4, construct a 92.5 percent confidence interval for the true population mean, µ, given that a random sample of 94 values was noted to have x¯ = 80.0.
A biologist wants to test the null hypothesis that the mean wingspan of a certain kind of insect is 12.3 mm against the alternative that it is not 12.3 mm.
A researcher discovers the number of parking tickets that a group of students have received during their driving careers. Twenty students reply and they have received between 9 and 20 parking tickets.
a company that manufacturers coffee for use in commercial machines monitors the caffeine content in its coffee. the
The number who will go to the Ohio State University is a binomial random variable. What is the mean number of seniors going to the Ohio State University?
Joe Coledge is the third-string quarterback for the University of Lower Alatoona. The probability that Joe gets into any game is 0.40.
The current method of calculating the mpg forecasts that the 2008 F-150 will average 16.8 mpg. Determine the probability that these same 100 AAA members would average more than 16.8 mpg while testing the 2008 F-150.
What is the probablitity that, for a sample of 40 college games to be played next week the mean number of holding penalties will be 2.1 penalties per game or less.
The sample information is reported below. At the .10 significance level can we conclude that there is a difference in the amounts quoted?
A basketball player has made 66% of his foul shots during the season. Assuming the shots are independent, find the probability that in tonight's game he misses for the first time on his 6th attempt?
Percentile plot of 1000 differences between means , the difference of the average of 100 students doing stats and the average of 100 students doing macroeconomics
Assume that the data has a normal distribution and the number of observations is greater than fifty. Find the critical z value used to test a null hypothesis.
1.in the table below we examine the relationship between final grade and the reported hours per week each student said
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