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If heads is a success when we flip a coin, getting a six is a success when we roll a die, and getting an ace is a success when we draw a card from an ordinary deck of 52 playing cards, find the mean and the standard deviation of the total number of successes when we
(a) flip a balanced coin, roll a balanced die, and then draw a card from a well-shuffled deck;
(b) flip a balanced coin three times, roll a balanced die twice, and then draw a card from a well-shuffled deck.
The sample has a mean weight of 15.3 pounds and a standard deviation of 1.9 pounds. Create a 95% confidence interval estimate for the true mean weight of all packages received by the parcel service.
If we have 2 groups with 2 characteristics each, what would our critical value be with an alpha of .025?
suppose the time it takes for a purchasing agent to complete an online ordering process is normally distributed with a
As part of a curriculum review, the psychology department would like to select a simple random sample of 20 of last year's 140 graduates to obtain information on how graduates perceived the value of the curriculum. Describe two different methods t..
the capacity of an elevator is 10 people or 1520 pounds. the capacity will be exceeded if 10 people have weights with a
Mean of 61 minutes and a standard deviation of 9 minutes. Find the proportion of runners who take more than 70 minutes to finish. Draw a sketch to show this proportion.
1 the average score for male golfers is 95 and the average score for female golfers is 106 golf digest april 2006.
An appliance manufacturer claims to have developed a new toaster oven that consumes an average of no more than 250 W. From previous studies, it is believed that power consumption for toaster ovens is normally distributed with a variance of 324 W.
A manufacturer of car batteries claims that his batteries will last, on average, 3 years with a variance of 1 year. If 5 of these batteries have lifetimes of 1.9, 2.4, 3.0, 3.5, and 4.2 years
consider the following experiment a ball is drawn without replacement from an urn containing two red and three blue
Consolidation of wholly owned subsidiary, pre-acquisition equity and BCVR entries for assets and liabilities
Random sample of 250 americans is selected, the mean of this sample belongs to a sampling distribution. What is the shape of this sampling distribution?
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