# Question: 1 Expression for the variance of Y 2 Probability that the

1. Expression for the variance of Y

2. Probability that the first trial B1 fails.

3. Expression for the mean of X

4. Probability that Y is zero

5. Probability that X is 2

6. Covariance between B1 and B2

7. Expression for the expected value of Y

8. The expected value of B1

9. Probability that Y is n

10. Probability that X is zero

(a) np

(b) e-λ

(c) e-λ λ2 / 2

(d) p

(e) 0

(f) pn

(g) 1 - p

(h) (1 – p)n

(i) np(1 – p)

(j) λ

2. Probability that the first trial B1 fails.

3. Expression for the mean of X

4. Probability that Y is zero

5. Probability that X is 2

6. Covariance between B1 and B2

7. Expression for the expected value of Y

8. The expected value of B1

9. Probability that Y is n

10. Probability that X is zero

(a) np

(b) e-λ

(c) e-λ λ2 / 2

(d) p

(e) 0

(f) pn

(g) 1 - p

(h) (1 – p)n

(i) np(1 – p)

(j) λ

## Answer to relevant Questions

1. If the selected 25 transactions are treated as Bernoulli trials, the resulting binomial calculations will be in error because of sampling from a finite population. 2. The binomial model for this problem sets n = 25 and p ...In the taste test of Exercise 27, are we more likely to find that the four customers prefer the same brand or to find their opinions evenly divided between the two brands? The Food and Drug Administration has veto power over the choice of drug names. In 2004, it used this power regularly, rejecting 36% of the names proposed by companies for reasons such as sounding too much like another ...Companies that sell food and other consumer products watch for problems. Occasional complaints from dissatisfied customers always occur, but an increase in the level of complaints may signal a serious problem that is better ...The normal quantile plot of daily stock returns for General Motors during 1992–1993 (507 trading days) shows an anomaly, a flat spot at zero. (a) What’s happened? (b) Why does the anomaly not appear in the histogram?Post your question