QUESTION 1

You want to check if the required sample size your accountant used is big enough. Calculate the required sample size for a 99% confidence level if the standard deviation is 4 and the allowed error is 3? Round to a whole number.

QUESTION 2

Match the questions with answers.Use this sample data for all questions:

Table 2: Time taken in seconds.Sample

290, 340,150,300,200, 100,400,500,600,89,94

- A. B. C. D. E. F. G. H. I. J. K. L. M. N.	What is the mean for table 2?
- A. B. C. D. E. F. G. H. I. J. K. L. M. N.	What is the median for table2?
- A. B. C. D. E. F. G. H. I. J. K. L. M. N.	What is the mode for table 2?
- A. B. C. D. E. F. G. H. I. J. K. L. M. N.	What is the sample standard deviation for table2 ?
- A. B. C. D. E. F. G. H. I. J. K. L. M. N.	Calculate the 75th percentile for table 2.
- A. B. C. D. E. F. G. H. I. J. K. L. M. N.	What is the interquartile range for table 2?
- A. B. C. D. E. F. G. H. I. J. K. L. M. N.	What is the z score for an x value of 200 using table 2?
- A. B. C. D. E. F. G. H. I. J. K. L. M. N.	Using the empirical rule to find the range of values containing 95% of the data from table 2, what is the upper value of the range? Hint: use the mean and standard deviation you previously calculated.

A.

198.38

B.

0.46

C.

290.00

D.

622.58

E.

278.45

F.

172.06

G.

no mode

H.

100

I.

177.95

J.

400.00

K.

-0.46

L.

794.64

M.

370

N.

300.00

QUESTION 3

The most important measure in any business is a successful purchase of their product. Task success is a discrete measure (0 is fail, 1 is successful purchase). The following table shows a discrete distribution across 100 clients for product purchase. .

Table 4

X (purchase success)	0	1	2	3
P(probability purchase)	0.1	0.3	0.2	0.4

- A. B. C. D. E. F. G. H. I. J. K. L. M. N. O.	Calculate theexpected valuefortable4?
- A. B. C. D. E. F. G. H. I. J. K. L. M. N. O.	Calculate the discrete variance for table 4?
- A. B. C. D. E. F. G. H. I. J. K. L. M. N. O.	What is the binomial probability that you find less than 11 clients who will buy your extended warranty if you present to 79 clients, and the probability of a client buying a warranty after your presentation is 20%?
- A. B. C. D. E. F. G. H. I. J. K. L. M. N. O.	What is the binomial expected value a client buys your extended warranty if the probability is 20% and 79 clients are in the sample?
- A. B. C. D. E. F. G. H. I. J. K. L. M. N. O.	What is the binomial variance whena client buys your extended warranty if the probability of buying is 20% and 79 clients are in the sample?

A.	10/79
B.	12.64
C.	3.56
D.	0.01
E.	1.04
F.	Cannot calculate without more information
G.	15.80
H.	1.90
I.	0.0625
J.	0.1101
K.	2
L.	1.09
M.	4.620
N.	1.0
O.	0.91

QUESTION 4

You find the probability of clients ordering your new web social media app follows a normal distribution. If your sample is 64, the mean is 70, and the standard deviation is 20, what is the probability of morethan 73 ordering your app ?

QUESTION 5

You find the probability of clients ordering your new web social media app follows a normal distribution. If the order mean is 70 and the standard deviation is 20, what is the probability less than 64 customers will order your new app?