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A "random survey" was conducted of 3274 people of the "microprocessor generation" (people born since 1971, the year the microprocessor were invented). It was reported that 48% of those
individuals surveyed stated that if they had $2000 to spend, they would use it for computer equipment. Also, 66% of those surveyed considered themselves relatively savvy computer users.
(Source: San Jose Mercury News)
a. Do you consider the sample size large enough for a study of this type? Why or why not?
Based on your "gut feeling," do you believe the percents accurately reflect the U.S. population for those individuals born since 1971? If not, do you think the percents of the population are actually higher or lower than the sample statistics? Why?
Calculate the mean and standard deviation of the sample mean based on data from 100 stores.
To test this notion, eight paid volunteers were placed (individually) in a room in which there was no light from the outside and no clocks or other indications of time.
Mauricio Cruz, a wine merchant for Cruz's Spirits Emporium, wants to determine if the average price of imported wine is less than the average price of domestic wine.
Use a .10 level of significance to test the claim that the variance of all scores in the population is more than 9.
Advertisers need to know which age groups are likely to see their ads. Purchasers of 120 copies of Cosmopolitan are shown by age group Perform the chi-square test for a uniform distribution at α = .01
Evaluate the factor effects. Find out which factors are significant in explaining yield.
Suppose U is a Unit (25, 50) random variable.Find the CDF of U and sketch a graph.
Plot stem-and-leaf plot and boxplot for Mtotal. Illustrate hand calculation of median location and upper hinge location of boxplot, and determine their corresponding data values.
Determine the mean and standard deviation of following probability distribution.
Tree diagram for a probability experiment - Identify the sample space of the probability experiment and determine the number of outcomes in the event. Show a tree diagram if it is appropriate.
Probability histogran curve of percentage of (P)z
Find out sample correlation coefficients of (I) age with dry weight, and (2) age with log 10 dry weight. Interpret your results.
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