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Set 1:
1. Given the mean equals to 33.1, and s = 1.56, compute the 99 percent and 90 percent confidence intervals for sample size n = 121.
2. Use one example to explain the differences between Type I error and Type II error and their relationship to the power of a statistical test
Set 2:
You wish to compare the short-term effects between two new sleep-aid drugs. You try the two drugs in a sample of eight subjects with five days between the two tests. The following data gives the number of hours during the night under each drug.
Subject
Drug A
Drug B
1
6
5
2
3
4
7
8
1. If you want to know if the two drugs have similar or different effects, what is the appropriate analysis?
A. An independent-samples T-test
B. A paired-samples T-test
2. Run the appropriate analysis using α = .05 and report your results.
The mean of the population was computed to be 126.9 grams and the standard deviation was 1.20 grams. Which food results in a more uniform weight?
Suppose that the probability of strong demand is 0.8 and the probability of weak demand is 0.2. What is the optimal decision using the expected value approach?
A random sample of 14 days shows Xbar = $502.95 and s = $64.00. You can assume normality. Using alpha = 4%, is the sampling result significant? Explain.
This yields 4 conditions: normal, mean (0 for errors, constant within treatment), constant variance and independent. B)(3) From the output given, are the assumptions in part a) satisfied?
suppose that 75 of adult americans agree that while downloading music from the internet and then selling it is piracy
Calculate the Mean, Median, Mode, Range and Standard deviation of this sample. Show Calculations: Use any calculation method desired
according to survey conducted by td ameritrade one out of four investors have exchange-traded funds in their
A frequency distribution was developed. The lower endpoint of the first class is 9.30, and the midpoint is 9.35. what is the upper endpoint of this class?
when dragons on planet pern lay eggs the eggs are either green or yellow. the biologists have observed over the years
The function s(t) = ut + 1/2 gt^2 represents the distance traveled s meters in time t seconds when the initial velocity is u m/s and acceleration is g m/s^2.
The grade point averages of 10 students are listed below. Find the median grade point average. 3.15, 3.62, 2.54, 2.81, 3.97, 1.85, 1.93, 2.63, 2.50, 2.80
A. What is the probability that an employee will have a cold next year?b. Given that an employee is involved in an exercise program, what is the probability that he or she will get a cold next year?c. What is the probability that an employee who is n..
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