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Consider taking a random sample X1 , . . . , Xn from a normal with mean μ and variance sigma^2.
Suppose you would like to conduce a hypothesis test of H0 : μ = 10 vs. H1 : μ != 10, and you happen to know that sigma^2 = 4.
Suppose in truth that μ = 11 and you collect a sample of size n = 20.
Calculate the power of this test.
If the company recorded the shipping weights of these new packages in pounds instead of ounces, what would the median and IQR be?
A researcher is interested in determining the proportion of public elementary schools that have a mandatory school uniform policy. The researcher randomly sampled n=400 public elementary schools and found that 100 of the schools have a mandatory s..
Classify each of the following random variables as discrete or continuous.- The price of a randomly selected ticket.- The time it takes to complete the game
What is the approximate probability that someone asked to pick a number from 1 to 10 will pick one of the two extremes, 1 or 10?
A sample of 25 individuals at a shopping mall found that the mean number of visits to a restaurant per week was 2.88 with a standard deviation of 1.59.
it has been shown that people drive 5 - 10mph faster than the posted speed limit on a highway. it has been thought that
Rolling the dice : An exeriment was conducted in which two fair dice was thrown 100 times. The sum of the pips showing on the dice was than recorded. the following frequency histogram gives the results.
Test the company's advertised claim that the net weight of a bar is 58.7 grams by performing a t test on the following data, which are in grams. Find d. Write a conclusion about Snickers bars.
A firm plans to hire 100 employees during the year. It expects that 25 of these employees will obtain graduate degrees within the next 5 years of being hired.
Shown here are the various prizes and the probability of winning each prize. Use these data to compute the expected value of the game, the variance of the game, and the standard deviation of the game.
1.a researcher was interested in determining whether incentives affect the response rate in surveys. a simple random
Describe the similarities between an F-ratio and a t statistic. The basic relationship between t statistic and F-ratios can be stated in an equation. What is that equation?
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