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IQ test was administered to 5 person before and after they are trained.The result are given below:
Candidates: 1 2 3 4 5
IQ before training: 110 120 123 132 125
IQ after training: 120 118 125 136 121
Test whether there is any change in IQ after the training program (The absolute value of 1 for 4 degrees of freedom at 1% level for one-tailed and two tailed tests are 3.747 and 4.604 respectively)
A nutritionist conducted an experiment on memory for dreams. She wanted to test whether it really was true that eating cheese before going to bed made you have bad dreams. Over three nights, the nutritionist fed people different foods before bed.
Bolts are randomly selected until a 5 mm bolt is obtained. The outcomes are the sequences of bolts that can be selected. So one outcome is 1, and the other is 342. List the equally likely outcomes.
Explain your answer to someone who is familiar with the t test for a single sample, but not with the t test for independent means.
Assuming the population of Math SAT scores for seniors in the district is approximately normally distributed, a 90% confidence interval for the mean Math SAT score μ for the population of seniors computed from these data is?
The mean height of women in a country (age 20-29) is 64.3 inches. A random sample of 75 women in this age group is selected. what is the probablity that the mean height for the sample is greater than 65 inches?
If 30 samples of 100 items are tested for nonconformity, and 95 of the 3,000 items are defective, find the upper and lower control limits for a p -chart.
A survey taken in a restaurant shows the following number of cups of coffee consumed with each meal. Construct an ungrouped frequency distribution.
Calculate the expected value of your portfolio and calculate the expected standard deviation of your portfolio.
What are the most common reasons you would select a non-parametric test over the parametric alternative?
What extremely important characteristic of the data set is not considered in the hypothesis test?
Give a possible description why serum cholesterol values for older males are lower than for younger males and reverse is true for females.
Which of these variables are discrete and which are continuous random variables?
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