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1. Which are likely to be independent events? For those you think are not, suggest reasons why.
(a) Gender of two consecutive babies born in a hospital.
(b) Car accident rates and the driver's gender.
(c) Phone call arrival rates at a university admissions office and time of day.
2. Fifty-six percent of American adults eat at a table-service restaurant at least once a week. Suppose that four American adults are asked if they ate at table-service restaurants last week. What is the probability that all of them say yes?
When combining probabilities, to find the probability of one event AND another event, the separate probabilities should be:
determine if the improvement is of practical significance one should. Crop researchers plant 100 plots with a new variety of corn. The average yield for these plots is x' = 130 bushels per acre
The number of passengers on the Carnival Sensation during one-week cruises in the Caribbean follows the normal distribution.
If the agency is risk neutral, use a decision tree to determine its best course of action.
Would you conclude that your data set is approximately normal? If so, what percentage of your data values lie:
We assume that the population is approximately normally distributed. Find the confidence interval: for a confidence level of 95%:
Determine the Midrange. Determine the Standard Variance. Determine the Standard Deviation
If a card is drawn at random from a standard 52-card deck, what is the probability that the card drawn is one of the following?
Projection are form the U.S. National Center for Education Statistics>. Create a multiple bar graph of data, and then explain any trends.
The width of a confidence interval will be:
The article claims that the distributions of annual returns for both common stocks and long-term government bonds are bell-shaped and approximately symmetric. Assume that these distributions are distributed as normal random variables with the mea..
Determine the probability that mean annual snowfall during 40 randomly picked years will exceed 111.8 inches?
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