The range of probability is any value between minus Infinity to plus infinity an
ID: 3155132 • Letter: T
Question
The range of probability is any value between minus Infinity to plus infinity any value between -1 to 1 any value larger than zero zero to one Suppose that a Normal probability model describes fuel economy (miles per gallon) for automobiles and that a Volvo has a standardized score (z-score) of -2.2. This means that Volvos... get gas mileage that Is 2.2 standard deviations worse than the average car. get 2.2 mpg less than the average car. get 2.2 miles per gallon. get -2.2 times the gas mileage of the average car. have a standard deviation of -2.2 mpg. In a large population of adults, the mean height is 68 inches with a standard deviation of 30, and a skewed distribution. Suppose 100 adults arc randomly selected for a market research campaign. The distribution of the sample means for height Is: Skewed, mean 68, standard error 30. Skewed, mean 68, standard error 3. Approximately normal, mean 68, standard error 3. Approximately normal, mean 68, standard error 30. Exactly normal, mean 68, standard error 30. Which of the following are true statements? Questionnaires with non-neutral wording are likely to be biased. Convenience samples often lead to under coverage bias. Voluntary response samples usually under represent people with strong opinions. I and II I and III II and III I, II, and III None of the above gives the true set of responses The Central Limit Theorem (CLT) says that when a simple random sample of size n, where n is sufficiently large, is drawn from any population with mean mu and standard deviation sigma, which of the following is true? Remember - your choice is specific CLT. Many of the choices below are true, but only 1 is true due to the CLT. The standard deviation of the sample means is sigma/sqareroot n. The distribution of the population is exactly normal. The distribution of the sample means is approximately normal. The distribution of the sample standard deviations is approximately normal. The mean of the sample means is mu.Explanation / Answer
10. A) This choice is specifically due to CLT.
9. D) All the three statements are true.
8. C) This follows CLT ith mean, mu and sd=s/sqrt n.
7. B)
6. D)