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What is a chi-squared test used for? What is the typical null and alternate hypothesis when doing a chi-squared test?
A sports researcher gave a standard written test of eating habits to 12 randomly selected professionals, four each from baseball, football, and basketball. The results were as follows:
Use the confidence level and sample data to find a confidence interval for estimating the population mean m.
Develop the hypothesis for a 3x3 factorial design (ANOVA). The experiment revolves around the effect of music and chocolate on words remembered. The first IV is the effect of music with 3 conditions
A survey was conducted to measure height off men. In survey, respondents were grouped by age. In the 20-29 age group, the heights were normally distributed, with a mean of 69.2 inches and a standard deviation of 2.0 inches.
Find the range and the standard deviation of the times.
List and describe the three assumptions of ANOVA. When should researchers use different hypothesis tests for independent and related samples? What is the difference between a one-way-ANOVA and a two-way-ANOVA?
Use the Excel COUNTIF function to determine the number of tires that last longer than 40,000 miles. What is your estimate of the percentage of tires that will exceed 40,000 miles?
What is the distinction between distribution-free methods and nonparametric methods?
A study of 40 bowlers showed that there average score was 186 the standard deviation of the population is 6. Find the 95% confidence interval of the mean score for all bowlers.
Many states are carefully considering steps that would help them collect sales taxes on items purchased through the Internet.
The data show that acreage owned per family is normally distributed with a mean of 10.0 acres and a standard deviation of 1.5 acres. Calculate the percentage of families that own at least 8.1 acres
All welders in a factory begin as apprentices. Every year the performance of each apprentice is reviewed. Past records indicate that after each review, 10% of the apprentices are promoted to professional welder
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