Calculus and Above

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of adults nationwide do not...

1.According to a CBS News poll conducted in January 2009, 52% of adults nationwide do not think that the use of marijuana should be made legal. In a random sample of 20 adults, what is the mean number of adults who do not think that the use of marijuana should be made legal? (Show your work)

2.Find the indicated probability for the standard normal Z: P(1.01< Z < 1.42)

3.In 2005, one-third of all female homicide victims were murdered by an intimate (Source: U.S. Department of Justice). Find the probability that in a sample of 20 female homicide victims, fewer than 7 were murdered by an intimate.

4.The distribution of heights of American women aged 18 to 24 is approximately normally distributed with mean 65.5 inches and standard deviation 2.5 inches. What is the probability that a randomly selected woman is over 73 inches tall? Use the Empirical Rule.

5.Suppose you collect the following sample from a normal population with μ= 50 and σ= 5:

49 61 50 58 45 59 45 63 46

What is the mean of the sampling distribution of the sample mean (x-bar)?

2.Find the indicated probability for the standard normal Z: P(1.01< Z < 1.42)

3.In 2005, one-third of all female homicide victims were murdered by an intimate (Source: U.S. Department of Justice). Find the probability that in a sample of 20 female homicide victims, fewer than 7 were murdered by an intimate.

4.The distribution of heights of American women aged 18 to 24 is approximately normally distributed with mean 65.5 inches and standard deviation 2.5 inches. What is the probability that a randomly selected woman is over 73 inches tall? Use the Empirical Rule.

5.Suppose you collect the following sample from a normal population with μ= 50 and σ= 5:

49 61 50 58 45 59 45 63 46

What is the mean of the sampling distribution of the sample mean (x-bar)?

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