STATSTISTICS

QUESTION 1

1. Identify the population graph below

	a.	uniform
	b.	U-shaped
	c.	J-shaped
	d.	Normal

1 points   

QUESTION 2

1. Identify the population graph below

	a.	uniform
	b.	U-shaped
	c.	J-shaped
	d.	Normal

1 points   

QUESTION 3

1. Identify the population graph below.

	a.	uniform
	b.	U-shaped
	c.	J-shaped
	d.	Normal

1 points   

QUESTION 4

1. The chances of an error occurring in any single line of code is found to be 0.001 (0.1%). If a program contains 400 lines of code, what is the probability that there are no errors?

4 points   

QUESTION 5

1. Find the area under the normal curve that lies to the right of z=0.55.

3 points   

QUESTION 6

1. Find the area under the normal curve that lies to the left of z=1.0.

3 points   

QUESTION 7

1. The probability of a given score range is 0.4713. The bottom of the score range is the average (z=0). What is the z-score for the upper end of the distribution?

3 points   

QUESTION 8

1. A process window is set so that 95.44% of product passes the process spec. In order to pass, the product must be close to average. How many standard deviations away does 95.44% represent?

3 points   

QUESTION 9

1. A coin is flipped 40 times. The number of heads is counted. What is the expected value for number of heads?

3 points   

QUESTION 10

1. If 100 people were each to flip a coin the same number of times, what would be the approximate distribution of the resulting total?

	a.	uniform
	b.	normal
	c.	exponential
	d.	chi-square

2 points   

QUESTION 11

1. Match the variables.

μ                                                                                                           σ                                                                                                           σ2                                                                                                           Q3                                                                                                           P(C)                                                                                                           ӯ

a. probability of event C b. population standard deviation c. population mean d. population variance e. probability of event A f. average of sample y g. sample standard deviation h. third quartile i. first quartile

6 points   

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