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BONUS!!! I need help with my statistics homework tonight before class 6:00 (I'm going in a little late)

1. A sample of 5 companies were examined for changes in their relative market share. The results showed the following increases and decreases: –5, 10, 10, 5, –10. Select the response which represents the calculated mean of these results.

2, 8, -2, 6

2.

A local trade union consists of plumbers and electricians. Classified according to rank:

Apprentice Journeyman Master Total

Plumbers 25 20 30 75

Electricians 15 40 20 75

40 60 50 150

What is the probability that a randomly selected electrician is a master?

3. Suppose a population consisted of 20 items. How many different samples of n = 3 are possible?

4. In the 1936 presidential election Franklin D. Roosevelt defeated Alfred E. Landon in a landslide vote. A Landon victory had been predicted by the Literary Digest, a magazine that ran the oldest, largest, and most widely publicized of the polls at the time. The Literary Digest's final prediction was based on 10 million sample ballots mailed to prospective voters, and 2.3 million were returned. The sample of voters was drawn from lists of automobile and telephone owners. Despite the massive size of this sample, it failed to predict a Roosevelt victory, being off the mark by 19 percentage points. The Literary Digest was wrong because

A. the sample size, although large, was not large enough

B. the right research questions were not asked

C. respondents intentionally lied about their preferred candidate

D. the sample used was not representative of the actual population at the time

1. A sample of 5 companies were examined for changes in their relative market share. The results showed the following increases and decreases: –5, 10, 10, 5, –10. Select the response which represents the calculated mean of these results.

2, 8, -2, 6

2.

A local trade union consists of plumbers and electricians. Classified according to rank:

Apprentice Journeyman Master Total

Plumbers 25 20 30 75

Electricians 15 40 20 75

40 60 50 150

What is the probability that a randomly selected electrician is a master?

3. Suppose a population consisted of 20 items. How many different samples of n = 3 are possible?

4. In the 1936 presidential election Franklin D. Roosevelt defeated Alfred E. Landon in a landslide vote. A Landon victory had been predicted by the Literary Digest, a magazine that ran the oldest, largest, and most widely publicized of the polls at the time. The Literary Digest's final prediction was based on 10 million sample ballots mailed to prospective voters, and 2.3 million were returned. The sample of voters was drawn from lists of automobile and telephone owners. Despite the massive size of this sample, it failed to predict a Roosevelt victory, being off the mark by 19 percentage points. The Literary Digest was wrong because

A. the sample size, although large, was not large enough

B. the right research questions were not asked

C. respondents intentionally lied about their preferred candidate

D. the sample used was not representative of the actual population at the time

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