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Bring to mind a research question that interests you, or a current event that utilizes statistics to present results, that you can use as an example for this discussion. State the research question or the current event and results.
Based on what you have learned, and using your example, how do you believe statistics can enrich and represent the results of a study? How can statistics be used to misrepresent the results of a study?
She wants to be 90% confident and be accurate within 5% of the true proportion. Find out the minimum sample size necessary.
The probability that Traci Muldone will die during the 10-year term of a life insurance policy is assessed by the insurance company at 1/5. Arthur Average's probability of living to the end of the 10-year period is reckoned at 95%
Calculate the control limits for a c chart when Ubar = 3.0%, n = 60, and you collect one sample per hour for 40 hours of production. (2 sets of control limits required, x bar and range)
The formula for a 95% confidence interval yields the interval 640 ± 5.88. Find out whether each of the given statements is true or false.
Create a drawing or plan for a 2 x 3 experimental design that would lend itself to a factorial ANOVA. Be sure to identify the independent and dependent variables.
A researcher hypothesized that the variation in the car rental rates (in US$/day) at a major city airport is less than in the car rental rates down town.
The random variable x has a normal distribution with mean=30 and standard deviation=30, find the probability that x assumes a value more than two standard deviations from its mean. more than three standard deviations from the mean.
Years to Complete a Graduate Program: The average number of years a person takes to complete a graduate degree program is 3. The standard deviation is 4 months. Assume the variable is normally distributed. If an individual enrolls in the program, ..
The following table gives the coal usage and electricity generated by ten randomly selected power stations in South Africa in 1992:
When formulating the conclusion to the test, why is the phrase fail to reject the null hypothesis more accurate than the phrase accept the null hypothesis?
You have a standard deck of cards and you take out 2 cards at random. Let Y1 represent the number of red Queens in your sample and let Y2 represent the number of spades in your sample.
For three independent samples, each with n = 100, the respective sample proportions are 0.30, 0.35, and 0.25. Use the 0.05 level in testing whether the three population proportions could be the same.
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