QUESTION 1

1. What is the Mean for the following numbers : 55, 1, 18, 66, 0 Please format to 2 decimal places.

1 points

QUESTION 2

1. What are the chances that less than 3 students out of a class of 35 studentswill fall asleep during astatisticslecture? History shows 3% of students fall asleep. Binomial.

		.1959
		.91
		.2828
		.0869

1 points

QUESTION 3

1. This table shows favorite dance by sex.

Music Girl Guy Total

Salsa 98 54 152

Tango 79 29 108

Total 177 83 260

What is the probability someonelikes Salsa ?

		.585
		.377
		.645
		.681

1 points

QUESTION 4

The mean amount spent by a family on food per month is $600 with a standard deviation of $75.Assuming that the food costs are normally distributed, what is the probability that a family spends more than $690 per month?

		0.1151
		0.0025
		0.8849
		none of the above

1 points

QUESTION 5

1. If I make phone calls and measure how many times I get an answering machine, what type of distribution is this?

		Discrete
		Normal
		Paranormal
		Uniform

1 points

QUESTION 6

1. According to the empirical rule, if the data form a "bell-shaped" normal distribution, _______ percent of the observations will be contained within 1 standard deviation around the mean? Convert your answer into decimal format where 50% becomes 0.50 .

		.68
		.75
		.95
		.997

1 points

QUESTION 7

1. Dance Girl Guy Total

Salsa 98 54 152

Tango 79 29108

Total177 83 260

What is the probabilitysomeone would like salsa given she is a girl?

		.377
		.554
		.681
		.645

1 points

QUESTION 8

1. What is the relative frequency for class A? (Use 2 decimal points)

Class	Frequency	Relative Frequency	Cumulative Relative Frequency
A	7	?
B	15
C	29
D	15

1 points

QUESTION 9

1. You go to the parking lot and find 3 black cars, 15 silver cars, 2 red cars, and 1 gold Toyota Prius. What is the mode for colour?

		Silver is the mode as it repeats most often
		The is no mode
		The gold Prius is the mode as that is Terry's car
		This is an example of bimodal.

1 points

QUESTION 10

1. If you join the chess team (C), then you are not allowed to join the rugby team (R) at the same time. In this case, team membership is

		mutually exclusive for (C and R)
		independent for (C and R)
		(C and R) are not complementary
		exhaustive

1 points

QUESTION 11

1. What is the lower outlier if Q1 is 28 and Q3 is 124?

		-116
		96
		268
		172

1 points

QUESTION 12

1. Dance Girl Guy Total

Salsa 98 54 152

Tango 79 29 108

Total 177 83 260

What is the probability someone is a guy or likes tango?

		.623
		.735
		.112
		No guys like tango, guys like hockey.

1 points

QUESTION 13

1. What is the Z Score for the following numbers : X is 159, mean is 75.78, and standard deviation is 65.06? Level of difficulty = 1 of 2 Please format to 2 decimal places.

1 points

QUESTION 14

1. What is the Expected Value for the following numbers : Use 2 decimal places. x = 0 P(X = x)= 0.27 x = 1 P(X = x)= 0.26 x = 2 P(X = x)= 0.05 x = 3 P(X = x)= 0.2 x = 4 P(X = x)= 0.22

1 points

QUESTION 15

1. What is the Combination or Permutation in a horse race of 20 horses, you must pick the first 2 horses and must match the exact order they win.

1 points

QUESTION 16

1. Using the Central Limit Theory, what is the probability that X is more than 377.92 when the mean of is 374 and standard deviation of 63.58. The sample is 38. Use 3 decimal places.

		.475
		.352
		.525
		None of the above

1 points

QUESTION 17

1. What is the Probability of randomly selecting someone who is Senior and has the X product? Please format to 2 decimal places.

	X	Y	Totals
Senior	28	12	40
Adult	15	20	35
Totals	43	32	75

1 points

QUESTION 18

1. What is the Range for the following numbers : 9, 42, 89, 98, 63, 78, 38, 17, 17 No decimal places.

1 points

QUESTION 19

1. In a right-skewed distribution?

		the median equals the mean.
		the median is less than the mean.
		the median is larger than the mean.
		none of the above.

1 points

QUESTION 20

1. What is the Discrete Variable Standard Deviation for the following numbers : x = 0 P(X = x)= 0.26 x = 1 P(X = x)= 0.12 x = 2 P(X = x)= 0.3 x = 3 P(X = x)= 0.13 x = 4 P(X = x)= 0.19 Formatted to 4 decimal places.

		1.4259
		2.0331
		1.87
		None of the above

1 points

QUESTION 21

1. What is the 57th Percentile for the following numbers : 75, 38, 17, 35, 81, 99, 35, 5, 51, Level of difficulty = 1 of 2 Please format to 2 decimal places.

1 points

QUESTION 22

1. The stress on grandmothers is apparently very high when students have to deliverlarge statistics assignments.The numbers below represent thenumber of grandmothers who are so ill that a student has to miss amajor assignment.What is the median number of grandmothers who were sick duringthis time of stress?

9, 5, 11, 6, 10

		11
		6.2
		6.3
		9

1 points

QUESTION 23

You find the probability that men and women will argue about what movie to see follows a binomial distribution with a probability of .63 using a sample of 20.She wants a romantic comedy where boy meets girl, fall in love in 3 minutes, then they argue for over an hour, then marry in the last 2 minutes of the movie. He wants a movie where a guy uses a laser sword to kill 10,000 enemies, rescues the girl and saves the world.Given the numbers, what is the expected value they argue about the movie they want to see?

		.63
		12.6
		Insufficient data to calculate
		4.662

1 points

QUESTION 24

1. Smoking is the leading cause of blindness (macular degeneration 30%+), leading cause of lung cancer, makes your breath smell, gives cancer to the people around you, the leading cause of impotence in men (30%+ over age 40), and 23 other terrible diseases such as COPD or emphysema.

What is the sample standard deviation of the number of cigarettes smoked per day by a man who is 45, blind, impotent, and has cancer?

21, 15, 5, 12, 18, 22

		40.3
		6.35
		15.5
		16.5