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Mary wants to see if she can predict the number of volunteer hours that potential volunteers will provide, if she has information on the volunteer's income level. If Mary collects information on volunteer hours from her volunteers as well as their income level rounded to the nearest dollar, what statistical application could she use in order to see if income level can accurately predict the number of volunteer hours a potential volunteer may provide? Remember Mary doesn't just want to know about correlation, Mary wants to be able to predict the exact number of hours a volunteer is likley to give. Which data collection is correct?
Pearson's RKendall's Tau CChi SquareSimple Regression
Will the sum of squared deviation scores be greater for the test or the exam (assume the same number of people sat both the test and the exam)? Why?
What are the assumptions underlying a normal distribution? What are the assumptions underlying a binomial distribution? Why do we want to assume that our sample data represent a population distribution?
Construct a 95% confidence interval for the population standard deviation. Test at the 5% level of significance that whether the variance of length of pipes is significantly different from the standards.
The board of directors of Saner Automatic Door Company consists of 12 members, 3 of whom are women.
The shirt was a mesh polo shirt. Given this information, what is ths probability that the mesh polo shirt came from box 1?
Is the estimate from the participants significantly higher than the actual number (µ = 3.1)? Use a one-tailed test with = .05.
About 95% are between 500 +- 200; i.e. between 300 and 700 Where is the data located? Where is the "middle" of the data? How variable are the data? How spread out about the "middle" are the data?
the population proportion is .30. what is the probability that a sample proportion will be within plusmn.04 of the
A randomized block design with 4 treatments and 5 blocks produced the following sum of squares values: SST = 1951, SSTR = 349, SSE = 188. The value of SSB must be:
Recent crime reports indicate that 4.2 motor vehicle thefts occur each minute in the United States. Assume that the distribution of thefts per minute can be approximated by the Poisson probability distribution.
f x has a normal distribution with mean µ=15 and standard deviation σ= 3, describe the distribution of x values for sample size n, where n = 4, n = 16, and n = 100. How do the x distributions compare for the various sample sizes?
Sampling seventy-two percent of americans squeeze their toothpaste tube from the top. This and other not so serious finding are included in The first really important survey of american habits.
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