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For the following situation, find the mean and standard deviation of the population. List all samples (with replacement) of the given size from that population. Find the mean and standard deviation of the sampling distribution and compare them with the mean and standard deviation of the population. (Round to two decimal places.)
The number of dvds rented by each of the three families in the past month is 66, 15, 7. Use a sample size of 2.
a perfect gas flows through an insulated passage with no shaft work. the entering conditions are t1 290 kp1 350 kpa
the study obtained a measure to determine how comfortable the shopper was in a store. Higher scores indicated greater comfort. Suppose the following data were collected. Use a = .05 to test for differences among comfort levels for three types of b..
Using Binomial approximation, find the proportion of the days that will be rejected.
a researcher is studying test anxiety using a standardized instrument that has a mean of 50 and a standard deviation of
Explain and give examples of how the particular outcomes of a study can suggest if a particular threat is likely to have been present.
In random, independent samples of 250 adults and 375 teenagers who watched a certain television show, 147 adults and 228 teens indicated that they liked the show.
what does p .05 mean? what are some misconceptions about the meaning of p .05? why are they wrong? should all
Explain briefly how simple data analysis methods you are to use in this project can be used in your chosen engineering discipline and for what purpose.
A sociologist wants to determine if the life expectancy of people in Africa is less than the life expectancy of people in Asia.
An analyst working at BC Statistics is compiling a report on the use of the internet at home. In 1997, 250 randomly selected people were asked about the average amount of time spent on the internet per week.
A psychologist has designed a questionnaire to measure individuals' aggressiveness. Assume that the scores on the questionnaire are normally distributed with a standard deviation of 80.
Discuss how the null and alternative hypothesis for one-sample testing differs from two-sample testing; and explain how these two hypothesis' are the same, and provide a numerical example?
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