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1. The probability of obtaining a random sample mean, which is lower than the population mean, is:
a) 1
b) 0
c) 0.5
d) none of these, since a sample mean can never be lower than a population mean
Question 2: The sum total of all registered voters in Canada represents
a) the population of potential Canadian voters
b) a parameter
c) statistic
d) sampling error
If the computed value for this problem is +2.33, and the level of significance is 0.05, can we conclude that the recall proportions for the two commercials are same?
A human factors psychologist studied three computer keyboard designs.
A game involving a pair of dice pays you 3 with probability 17/36, costs you 2 with probability 14/36, and costs you 4 with probability 5/36. What is your probability of losing money in one play of the game?
Any analysis required to check the required conditions (note that if you find that you cannot meet the required conditions for the test you expected to do, you must use the appropriate non-parametric test)
Your statistics instructor wants you to determine a confidence interval estimate for the mean test score for the next exam.
If we were to ask three people at arbitrary, determine the probability that they will all prefer punk rock?
To test the difference between two means using two mean z test.
A study of cardiovascular risk factors compared heavy smokers, light smokers, and nonsmokers. Both men and women were included in the study so that the two factors are smoking level and gender.
What is the intercept for the logistic regression equation and What is a 95% confidence interval for the odds ratio
Perform a proper analysis. Describe your null and alternative hypothesis, report the p-value. What is your conclusion?
Using the simple test of independence (described in the lecture), decide if the events high calorie and high fiber are independent or dependent. Show your work.
The world record time (in minutes) in the marathon is plotted versus the year in which the record was set for men and women separately. The plotting symbol o is used for men and x for women. The data include only records set between 1908 and 1988.
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