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Do males and females have different preferences for features of smartphones? A manufacturer surveys a sample of males and females about their preference between two different versions of a calendar program. An SRS of 200 males finds 150 prefer version A. An SRS of 100 females finds 70 prefer version A. The p-value for a test of no difference in preference for version A between the two sexes is 0.36. Which of the following is correct?
1) There is a 36% chance that males have the same preference for version A as females.
2) The preference for version A by males is 36% larger than that of females.
3) The chances of seeing this size difference is not that unusual as it would happen 36% of the time if males and females had the same preference.
4) There is a 36% chance that the difference in preference rates is real and not just a sampling artifact.
Use StatKey to construct a 95% bootstrap confidence interval using the percentile method. Take at least 5,000 resamples.
We have seen how easy a country can move from a capitalistic society to a socialist/communist system; what are the problems associated with the disassembling
Test to see if the distribution of graduate majors has changed (use α = 0.01). Show all information including test statistic, critical value and interpret the results.
Compute mean, variance, and standard deviation of number of parents who correctly recognize their child's illness. Determine the probability at most five parents are correct.
Determine the calculated value of the test statistic? What distribution does test statistic have when null hypothesis is true?
Suppose we wish to conduct a survey of adult US voters about whether or not they intend to vote for an incumbent in congress in the next election. Suppose that we survey 1000 people and 230 say they will.
Problem 2: Construct a scatter plot of the following data using Minitab:
From a decision-analysis perspective, why is it worthwhile to spend time studying the Utility Axioms and Paradoxes?
Read the article: "The Security Tools You Need" at www.pcworld.com/downloads/collection/collid,1525/fi les.html.
Respiratory breathing capacity of individuals in houses with low levels of nitrogen dioxide was compared to the capacity of individuals in houses with high levels of nitrogen dioxide.
(a) Compute the mean number of flips until the pattern HHTHHTT appears. (b) Which pattern requires a larger expected time to occur: HHTT or HTHT?
Tthe hypothesis test used (normal curve, single sample t-test, dependent samples t-test, independent samples t-test, ANOVA). For situations 1, 3, 4, and 5, also state whether the test is unilateral or bilateral.
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