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This week introduces the chi-square goodness-of-fit-test, which looks for differences across independent groups. Since this is similar to the independent t-test, which looks for differences between independent groups,
1). Discuss what each of these tests is actually measuring.
2). Be sure that your discussion addresses the major differences between each of these approaches.
3). How do you know when to use one analysis over the other?
To test the given claim using Single Proportion Z test.
Visa Card USA studied how frequently young consumers, ages 18 to 24, use plastic cards in making purchases. The results of the study provided the following probabilities.
Comparison of paired and unpaired samples test - Identify which of the two tests (Independent samples and Paired samples) test is the preferred test and justify your choice.
Describe the types of probability -example of classical probability, empirical probability, or subjective probability.
Suppose the annual return on XYZ stock follows a normal distribution with mean 0.12 and standard deviation 0.30.
At the 0.01 significance level, can we conclude that the mean number of patients per day is more than 25? Estimate the p-value and interpret it.
At one university, the distance to students' home is normally distributed with a mean of 200 miles and a standard deviation of 25 miles.
The probability that an American CEO can transact business in a foreign language is .20. Ten American CEOs are chosen at random.(Round your answers to 4 decimal places.)
Utilizing the 5% level of significance was there a significant change in cholesterol level. Elucidate your answer to someone who has never ever taken a course in statistics.
The heights of 18 year old men are approximately normally distributed with mean 68 inches and a SD of 3 inches.
What is your decision regarding the null hypothesis and interpret.
To get the best deal for CD player, Jessica called eight appliance stores and asked the cast of a specific model. The prices she quoted are listed below. Show all work. Compute the standard deviation.
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