The weights of extra-large eggs have a Normal distribution with a mean of 1 ounc
ID: 3311101 • Letter: T
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The weights of extra-large eggs have a Normal distribution with a mean of 1 ounces and a standard deviation of 0.1 ounces. What is the sampling distribution of the sample mean weight of the eggs in a randomly selected carton of a dozen eggs? The weights of extra-large eggs have a Normal distribution with a mean of 1 ounces and a standard deviation of 0.1 ounces. What is the sampling distribution of the sample mean weight of the eggs in a randomly selected carton of a dozen eggs? ON(1, 0.01) O N(12, 1) N(12, 0.01) N(1, 0.02942) The length of time it takes to get through the security checks at a very large urban airport is a random variable with a mean of = 20.6 minutes and a standard deviation of = 8.4 minutes. A simple random sample of 36 airline passengers is to be observed going through security, what is the variance of the sampling distribution of the sample mean x ? O It is close to 8.4 minutes, but we can't be certain without having the data to determine it. 8.4 minutes O 1.4 minutes 1.96 minutes 20.6 minutes A gasoline tank for a certain car is designed to hold 15 gallons of gas. Suppose that the actual capacity of a randomly selected tank has a distribution that is approximately Normal with a mean of 15.0 galons and a standard deviation of 0.15 gallons. If four tanks are randomly selected, what is the probability that their average capacity will be between 14.75 and 15.10 gallons? 0.6808 0.9084 0.9962 0.2397 The distribution of the amount of money undergraduate students spend on books for a term is slightly right-skewed, with a mean of the probability that this student spends more than $425 on books? 400 and a standard deviation of $80. If a student is selected at random, what is 0.6227 O 0.3773 This can't be determined from the information given. 0.1125 The distribution of the amount of money undergraduate students spend on books for a term is slightly right-skewed, with a mean of $400 and a standard deviation of $80. If a simple random sample of 100 undergraduate students is selected, what is the probability that these students spend, on average, more than $425 on books? 0.2353 0.3773 This can't be determined from the information givenExplanation / Answer
1) option D is correct
2)The population and sample mean are always the same ... in this case it is 20.6 minutes.
option E is correct
4)
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