Question 1:

A binomial experiment has the given number of trials n and the given success probability p .

n=8;p=0.3

(a) Determine the probability P3. Round the answer to at least three decimal places.

P(3) = blank.

(b) Find the mean

(c) Find the variance and standard deviation

Question 2:

A binomial experiment has the given number of trials n and the given success probability p.

n=8, p=0.5

(a)Determine the probability P1orfewer . Round the answer to at least four decimal places.

(b) Find the mean

(c) Find the variance and standard deviation

Question 3:

Google it: According to a recent report, 66% of Internet searches in a particular month used the Google search engine.Assume that a sample of 20 searches is studied. Round the answers to at least four decimal places.

(a) What is the probability that exactly 17 of them used Google?

(b) What is the probability that 12 or fewer used Google?

(c) What is the probability that more than 17 of them used Google?

(d) Would it be unusual if fewer than 9 used Google?

It blank be unusual if fewer than 9

used Google since the probability is blank.

Question 4:

Stress at work: In a poll about work, 34% of respondents said that their jobs were sometimes or always stressful. Eight workers are chosen at random.

(a) What is the mean number who find their jobs stressful in a sample of 8 workers? Round the answer to two decimal places.

(b) What is the standard deviation of the number who find their jobs stressful in a sample of 8 workers? Round the answer to four decimal places.

Question 5:

Caffeine: Following are the number of grams of carbohydrates in 12 -ounce espresso beverages offered at a coffee shop.

48	30	10	69	15	37	22	43	45	28	29	9
30	11	22	39	25	27	45	5	49	50	33	34

(a) Find the first and third quartiles of these data.

The first quartile of these data is blank The third quartile of these data is blank

(b) Find the median of these data.

(c) Find the upper and lower outlier boundaries.

(d) The beverage with the most carbohydrates has 68 grams. Is this an outlier?