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1. The Statistical Abstract of the United States published by the U.S. Census Bureau reports that the average annual consumption of fresh fruit per person is 99.9 pounds. The standard deviation of fresh fruit consumption is about 30 pounds. Suppose a researcher took a random sample of 38 people and had them keep a record of the fresh fruit they ate for one year. (Round all z values to 2 decimal places. Round your answers to 4 decimal places.)
a. What is the probability that the sample average would be less than 90 pounds?
p =
b. What is the probability that the sample average would be between 98 and 105 pounds?
c. What is the probability that the sample average would be less than 112 pounds?
d. What is the probability that the sample average would be between 93 and 96 pounds?
2. According to a study by Decision Analyst, 21% of the people who have credit cards are very close to the total limit on the card(s). Suppose a random sample of 600 credit card users is taken. What is the probability that more than 150 credit card users are very close to the total limit on their card(s)?
(Round all z values to 2 decimal places. Round all intermediate calculations and answer to 4 decimal places.)
How would you determine which test would be appropriate to use? What characteristics of the problem would you use to determine which hypothesis test you should use? Explain your answer.
Is the chi-square distribution is a skewed distribution whose mean value is n for degrees of freedom larger than two?
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Among 12 adults randomly selected from this area, only 3 reported that their health was excellent. Find the probability that when 12 adults are randomly selected, 3 or fewer are in excellent health.
let x be a random variable with density functionfx 2 exp2x x gt 00 otherwise.a compute p 0.5 lt x lt 1b compute f x
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The heights in inches of 18 randomly selected adult males in LA are listed as: 70, 69, 72, 57, 70, 66, 69, 73, 80, 68, 71, 68, 72, 67, 58, 74, 81, 72. Display the data in a stem-and-leaf plot.
Conduct the hypothesis test and provide the test statistic, critical value and/or P- value and state the conclusion.
ABC Corporation of California publishes a variety of statistics, including the number of individuals who got a new job during the past 12 months and the mean length of time the individuals have been on the job.
What is the formula for the weighted average score for alternative j when using a multi-criteria scoring model?
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