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A new report claims that 45% of enlisted personnel who have spent at least 4 years and no more than ten in service complete a bachelor's degree, 25% complete some college work, 15% don't seek extra college-level training, and 15% are not accounted for. You wish to see how frequencies determined in population compare with particular local Navy base, so you take easy arbitrary sample of 500 enlisted sailors who have finished between 4 and 10 years in Navy. You determine that 275 completed college degree, 88 have completed some college work, 37 have not required extra college-level training, and rest of the sailors arn't accounted for. How does your sample compare to what you expected to determine?
a) To see how your local Naval base compares to report of all enlisted workers, you will use a
b) Define null hypothesis.
c) Explain how statistics for test you have selected.
d) Are results statistically important? Explain why or why not?
Which of following statements would be right concerning a twotail test at 0.05 level of significance? We can conclude that average cottage cheese consumption in America is at least 0.705 pound more or less than 2.75 pounds per person per year.
Internal study by Technology Services department at Lahey Electronics disclosed company employees get the average of 2 emails per hour. Suppose arrival of these emails is approximated by Poisson distribution.
What happens to the expected return and standard deviation of returns of the portfolio in Part a if the following conditions exist?
Data on distribution of cost for building effort, design work and testing effort.
We want to estimate the population mean within 5, with a 99% confidence level. The population std dev is estimated to be 15. How large is the required sample size?
You find that a random sample of five microwave ovens has a mean repair cost of $75 and a standard deviation of $12.50. At α = 0.01, do you have enough evidence to support the repairer's claim?
A sample of 100 observations has a mean of 2.99 and a standard deviation s equal to 0.5 Conduct the following test of hypotheses about the corresponding population mean at a level of significance of α = 0.2
Which of the following(s) can be considered (a) variable(s)?
What is the likelihood that none of the selected flights arrived within fifteen minutes of scheduled time?
The probability that the daily demand at this store is at least one and at most three is:
The 50 members of the placebo group had blood pressure lowered by an average of 15 points with standard deviation 8 points. To analyze this information we will use a, When testing whether or not the increases in spending are different, the test is ..
Run an ANOVA using only groups 1 to 6 (You can hide group 7 from the analysis by data followed by select cases and then you filter out group 7 by if GROUP~= ). Also run the posthoc tests LSD and Bonferroni.
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