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A professor in the MIS department of a business school claims that there is much more variability in the final exam scores of students taking the introductory MIS course as a requirement than for students taking the course as part of their majors. Random samples of 10 introductory non- MIS students and 10 MIS majors are taken from the professor's class rosters. The mean score of the non-MIS students sampled was 65 with a variance of 210.2. The average score of the MIS majors sampled was 80 with a variance of 36.5. At the .05 level of significance is there evidence to support the professor's claim that the variability of scores is higher for the non-MIS students than for the MIS majors?
1. the diameter of bearing shafts that are manufactured in your factory follow a normal distribution with a mean of 1
Can you estimate the probability that the next 4 parties will tip an average of at least $15? Explain.- Is it likely that his 10 parties today will tip an average of at least $15? Explain.
At the 5% significance level, can you conclude that sleeping on the job depends on job category?
An accounting firm carries an advertisement in The Wall Street Journal. The firm estimates that 60% of the people in the potential market read The Wall Street.
Three dessert packages to choose from. In how many different ways could the couple select an appetizer package, a main course,and a dessert package?
Each driver is then asked to insert a music CD and play track number 18, and engineers measure how long it takes for this task to be accomplished. ANOVA is to be used in analyzing the data.- Identify the independent and dependent variables, and ex..
In a random sample of 36 people, find the probability that the average amount spent is more than $61.50. How does central limit theorem apply to this problem?
For each of the following questions, draw a diagram of a distribution curve and show your calculations. Always round to the nearest fourth decimal place.
the amount of time in minutes devuted to commercials on a tv channel during any half-hour program is a random variable
Based on our poll what is the margin of error of the proportion of voters favoring the incumbent?
a recent poll asked a random sample of 1012 u.s. adults what they do with the milk in the bowl after they have eaten
What are the types of bias (with examples) that one encounters when trying to conduct a phone survey by looking up numbers randomly in a phone book.
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