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1. One sample has a mean of M=4 and a second sample has a mean of M=9. The two samples are combined into a single set of scores. a. What is the mean for the combined set if the first sample has n=4 scores and the second sample has n=6? b. What is the mean for the combined set if the first sample has n=6 scores and the second sample has n=4? 2. For the following population of N = 8 scores: 1, 6, 1, 1, 1 a. Calculate the range and the standard deviation. (Use either definition for the range) b. Add 2 points to each score and compute the range and the standard deviation again. Describe how adding a constant to each score influences measures of variability. 3. After 2 points have been added to every score in a sample, the mean is found to be M=75 and the standard deviation is s=4. What were the values for the mean and standard deviation for the original sample? b. After every score in a sample has been multiplied by 2, the mean is found to be M=40 and the standard deviation is s=6. What were the values for mean and standard deviation for the original sample? 4. Calculate the SS, variance, and standard deviation for the following sample of n=6 scores: 6, 4, 6, 5, 4, 5 (Note: The computational formula for SS works well with these scores.) 5. Calculate the SS, variance, and standard deviation for the following population of N=8 scores: 8, 7, 7, 9, 8, 7, 9, 9 (Note: The computational formula for SS works well with these scores.)
What is this maximin value
Evaluate the value of beta for each stock. Which of these stocks would you expect to perform best in an up market? Which would you expect to hold their value best in a down market?
Write a brief note stating the circumstances under which cusum charting may be preferable to normal Shewart charting methods and calculate the mean of the sample values below, and suggest a suitable value for k, the cusum reference value.
What are some of the main uses of a regression analysis
measures of central tendency and dispersion with spssthe statistics for this week become the basis for several other
Annual salary plus bonus data for chief executive officers are presented in the Business-Week Annual Pay Survey.
Define the hypothesis and find the standard error of the difference in the means also find the test statistic - Determine the required sample size to be able to use a 99% confidence interval.
Using the information from part by hand, calculate a 90 confidence interval for the difference of the means for the two time periods.
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advertising for this variable each student must fill in the table with whatever random values each student wants.
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