The distribution of room and board expenses per year at a four-year college is normally distributed with a mean of $5850 and standard deviation of $1125. Random samples of size 20 are drawn from this population and the mean of each sample is determined. Which of the following mean expenses would be considered unusual? Question content area bottom Part 1 A. $5180 B. $6350 C. $6180 D. none of these
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The distribution of room and board expenses per year at a four-year college is normally distributed with a mean of $5850 and standard deviation of $1125. Random samples of size 20 are drawn from this population and the mean of each sample is determined. Which of the following mean expenses would be considered unusual?
Diwakar M.
The mean undergraduate costs for tuition, room, and board at four-year colleges are $26,489, and the standard deviation is $53,204. The undergraduate costs for tuition, room, and board are approximately normally distributed. 36 four-year colleges are selected. The probability that the sample mean cost for these 36 schools is less than $25,000 is: a. 0.00 b. 0.013 c. 0.321. The probability that the sample mean cost for these 36 schools is between $24,000 and $26,000 is: a. 0.15 b. 0.18 c. 0.22. The lowest sample mean cost for the top 10% (among these 36 schools) is: a. 25,550 b. 27,173 c. 30,595. The highest sample mean cost in the bottom 10% (among these 36 schools) is: a. 22,383 b. 25,805 c. 27,775. The middle 20% of the sample mean cost (among these 36 schools) is between: a. 25,677 and 27,300 b. 26,354 and 26,624 c. 27,229 and 28,569.
Sri K.
room and board cost: the mean room and board expense per year at four-year colleges is $10,614. Assume that the room and board expenses are normally distributed with a standard deviation of $1650. a) find the probability that the room and board cost for a randomly chosen four-year college is more than $11,300. b) for a random sample of 36 four-year colleges, find the probability that the mean room and board cost is less than $10,200.
Madhur L.
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