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The trustee of a company's pension plan has solicited the opinions of a sample of the company's employees about a proposed revision of the plan. A breakdown of the responses is shown in the accompanying table. Is there evidence at the 10% level to infer that the responses differ among the three groups of employees?
Blue-Collar White Collar Managers
Responses Workers WorkersFor 67 32 11Against 63 18 9
Provide an example of a situation in which factor analysis, cluster analysis, and multidimensional analysis might be used.
Assume the shopping time followed an approximately normal distribution. Use a 5% level of significance to test the claim that the average shopping time foe women with children in Carson mall is higher than the national average for this type of sto..
The following data represents the amount of time ( in minutes ) that a person had to wait for a bus to work on a random sample of 5 working days.
In an effort to counteract student cheating, the professor of a large class created four versions of a midterm exam, distributing the four versions among the students in the class.
In a recent year, 11th grade New York public school students taking an English test produced test scores that were normally distributed with a mean of 81 and a standard deviation of 6. Let x be a random variable that represents a test score.
3 cards are randomly selected without replacement from an ordinary deck of 52 playing cards. Compute the conditional probability that the first card selected is a spade, given that the second and third cards are spades.
If you randomly assign participants to groups, can you suppose the groups are equivalent at the beginning of the study?
The manager of the greeting card section of Mazey's department store is considering her order for a particular line of Christmas Cards. Develop the payoff table for this decision situations.
Find the margin of error for the 95% confidence interval used to estimate the population proportion.
What is the distinction between a one-sided and a two-sided hypothesis test in this problem?
Calculate the average or the median of the average or medians of the samples and compare it with the average of the population.
A mortgage department of a large bank is studying its recent loans. Of particualr interest is how such factors as the value of the home (in thousands of dollars), education level of the head of the household, age of the head of the household, curr..
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