please choose the right one :

1)In a Binomial experiment, the probability of getting 7 successes in 15 trials with p = 0.3 is the same as

a.

the probability of getting 8 successes in 15 trials with p = 0.3

b.

the probability of getting 8 successes in 15 trials with p = 0.7

c.

the probability of getting 7 successes in 15 trials with p = 0.7

d.

None of the suggested answers are correct

2)Let the random variable Z follow a standard normal distribution. What is the value k, such that P(-0.48 < Z < k) = 0.4330?

a.

0.32

b.

0.56

c.

0.67

d.

None of the suggested answers are correct

e.

0.43

3)Consider the following statements:

iThe distance between the 25thpercentile and the median is always the same as the distance between the median and the 75thpercentile.

iiThe interquartile range will always exceed that of the range.

iiiThe first and second quartiles of a data set can never be equal.

ivIn asymmetric data, the value forQ2is always halfway betweenQ1andQ3.

a.

(ii) and (iii) are true.

b.

Only (i) is true.

c.

None of the suggested answers are correct.

d.

Only (iii) is true.

e.

(i) and (iv) are true.

4)Ten percent of all truck drivers are female. A random sample of ten truck drivers is taken. The probability that there will be no more than one female truck driver in the sample is

a.

0.20

b.

0.387

c.

0.01

d.

0.736

e.

None of the suggested answers are correct