Quiz about Marking Period 4 Extra Credit

Question 1

Find the mean and standard deviation (Sx) for the following data set:

89, 72, 100, 87, 65, 98, 77, 92

Accepted Answer

85, 12.5

Answer

75.3, 30.65

Answer

85, 11.7

Answer

88, 12.5

Question 2

Find the z score if the mean is 80, standard deviation is 5, and x=87.

Accepted Answer

1.4

Answer

-1.4

Answer

-1.75

Answer

1.75

Question 3

Find x if the mean is 20, standard deviation is 6, and z=1.32.

Accepted Answer

27.92

Answer

32.4

Answer

7.92

Answer

-12.08

Question 4

Assume the distribution of the heart rates of 21 year old females at rest is 68 bpm with a standard deviation of 4 bpm. If 200 women are tested, how many would have a heart rate less than 75 bpm?

Accepted Answer

192

Answer

96

Answer

8

Answer

4

Question 5

Assume that the math SAT scores are normally distributed with a mean of 500 and a standard deviation of 100. If you score 480 on the math portion, what percent of those taking the test scored above you?

Accepted Answer

58%

Answer

42%

Answer

98%

Answer

92%

Question 6

What data value is the upper quartile (Q3)?

Accepted Answer

64

Answer

62

Answer

66

Answer

58

Question 7

What is the probability that the person picked will be a boy given they speak german?

Accepted Answer

.7273

Answer

.4

Answer

.16

Answer

.22

Question 8

What is the probability that they speak French given they are a girl?

Accepted Answer

.4

Answer

2.14

Answer

.24

Answer

.8571

Question 9

Use the Venn diagram to find the probability that a randomly chosen doctor from Leoneville General is...

A male surgeon

Accepted Answer

0.39

Answer

0.58

Answer

0.19

Answer

0.68

Question 10

Use the Venn diagram to find the probability that a randomly chosen doctor from Leoneville General is...

A female, but not a surgeon

Accepted Answer

0.13

Answer

0.42

Answer

0.29

Answer

0.19

Question 11

Use the Venn diagram to find the probability that a randomly chosen doctor from Leoneville General is...

A surgeon OR female

Accepted Answer

0.81

Answer

0.52

Answer

1.10

Answer

0.58

Question 12

Use the Venn diagram to find the probability that a randomly chosen doctor from Leoneville General is...

A surgeon GIVEN they are female

Accepted Answer

0.69

Answer

0.32

Answer

0.426

Answer

2.231

Question 13

You pick 2 cards from a standard deck of cards, WITHOUT REPLACEMENT, what is the probability that you draw two black cards?

Accepted Answer

$$0.245$$

Answer

$$0.5$$

Answer

$$0.99$$

Answer

$$0.25$$

Question 14

You roll 2 six-sided dice. What is the probability that the first die is odd and the second one is even?

Accepted Answer

$$\frac{1}{4}=0.25$$

Answer

$$\frac{1}{2}=0.5$$

Answer

$$1$$

Answer

$$\frac{1}{3}=0.\overline{3}$$

Question 15

A small veterinary practice currently has 95 patients that they see regularly. Twelve of the animals are birds, 22 are cats, and 61 are dogs. An emergency call comes into the office, what is the probability that the animal that needs to be seen is a cat or a dog?

Accepted Answer

$$\frac{83}{95}\approx0.8737$$

Answer

$$\frac{73}{95}\approx0.7684$$

Answer

$$\frac{61}{95}\approx0.6421$$

Answer

none of these

Question 16

33, 25, 42, 25, 31, 37, 46, 29, 38
What is the third quartile of the data?

Accepted Answer

40

Answer

37

Answer

38

Answer

46

Question 17

The mean life of a tire is 30,000 km. The standard deviation is 2000 km.

Then, 68% of all tires will have a life between ___________ km and __________ km.

Accepted Answer

28,000 km and 32,000 km.

Answer

24,000 km and 34,000 km.

Answer

26,000 km and 34,000 km.

Answer

27,000 km and 31,000 km.

Question 18

The shelf life of a particular dairy product is normally distributed with a mean of 12 days and a standard deviation of 3 days.

About what percent of the products last between 12 and 15 days?

Accepted Answer

34%

Answer

68%

Answer

16%

Answer

2.5%

Question 19

What shape is a normal distribution curve?

Accepted Answer

Bell curve

Answer

Half curve

Answer

Round curve

Answer

Square curve

Question 20

If the shaded area under the curve is .85, what is the other missing portion of the curve?

Accepted Answer

.15

Answer

.26

Answer

.30

Answer

.17

Question 21

BLANK is the science of collecting, organizing analyzing, and interpreting data in order to make decisions.

Accepted Answer

statistics

Answer

Data

Answer

population

Answer

sample

Question 22

BLANK consists of information coming from observations, counts, measurements, or responses.

Accepted Answer

Data

Answer

Population

Answer

Statistics

Answer

sample

Question 23

Blank is the collection of ALL outcomes, responses, measurements, or counts that are of interest.

Accepted Answer

Population

Answer

data

Answer

Statistics

Answer

Sample

Question 24

Blank a subset of a population

Accepted Answer

Sample

Answer

Data

Answer

Statistics

Answer

Population

Question 25

Blank a numerical description of a population characteristic

Accepted Answer

Parameter

Answer

Statistic

Answer

Descriptive

Question 26

Blank is a numerical description of a sample characteristic

Accepted Answer

Statistic

Answer

Inferential

Answer

Parameter

Question 27

Blank consists of attributes, labels, or non-numerical entries.

Accepted Answer

Qualitative

Answer

Data

Answer

Quantitative

Answer

Variable

Question 28

Blank- consists of numerical measurements or counts.

Accepted Answer

Quantitative

Answer

Qualitative

Answer

Ordinal

Answer

Norminal

Question 29

What is P(not sport)?

Accepted Answer

26/50

Answer

24/50

Answer

3/50

Answer

23/50

Question 30

P(Pizza|Senior):

Accepted Answer

10/15

Answer

4/5

Answer

15/10

Answer

10/5

Question 31

Are being a freshman and preferring pizza dependent events?

Accepted Answer

independent

Answer

dependent

Question 32

The shelf life of a particular dairy product is normally distributed with a mean of 12 days and a standard deviation of 3 days.

About what percent of the products last between 12 and 15 days?

Accepted Answer

34%

Answer

68%

Answer

16%

Answer

2.5%

Question 33

What percent of people within 3 standard deviations of the mean?

Accepted Answer

99.7

Answer

34

Answer

68

Answer

95

Question 34

What percent of people within 2 standard deviations of the mean?

Accepted Answer

95

Answer

99.7

Answer

34

Answer

68

Question 35

What percent of people within 1 standard deviation of the mean?

Accepted Answer

68

Answer

99.7

Answer

34

Answer

95

Question 36

This data is normally distributed.  What percent of the data is in the shaded region?

Accepted Answer

50%

Answer

68%

Answer

95%

Answer

99.7%

Question 37

If Gonzalo's score is 87, the class average is 82, and the SD is 4, what is Gonzalo's Z-score?

Accepted Answer

+1.25

Answer

-1.25

Answer

+1.20

Answer

+1.02

Question 38

A national achievement test is administered annually to 3rd graders. The test has a mean score of 100 and a standard deviation of 15. If Jane's z-score is 1.20, what was her score on the test?

Accepted Answer

118

Answer

82

Answer

88

Answer

100

Question 39

How many students are between 48 and 51 inches tall?

Accepted Answer

2

Answer

14

Answer

Answer

Question 40

The Archer basketball team scored the following for its first 8 games: 51, 67, 55, 70, 53, 74, 58, and 49. Determine the mean, median for that series of numbers.

Accepted Answer

mean of 59.6 and median of 56.5

Answer

mean of 57.6 and median of 55

Answer

mean of 59.6 and median of 58

Answer

mean of 59.6 and median of 55

Question 41

Adam's Z-score on a test is +2.5.  What does this mean?

Accepted Answer

He scored 2.5 standard deviations above the average.

Answer

He'd better start studying.

Answer

He did better than EVERYONE.

Answer

He did terrible.

Question 42

If heights of 3rd graders follow a normal distribution with a mean of 52 inches and a standard deviation of 2.5 inches, what is the z score of a 3rd grader who is 47 inches tall?

Accepted Answer

-2

Answer

-5

Answer

2

Answer

5

Question 43

What is the probability a person chosen is a woman given she preferred Toyota?

Accepted Answer

.6774

Answer

.525

Answer

.4627

Answer

.3143

Question 44

A jar contains 4 white chips, 5 purple chips, and 1 black chip. Chips are selected randomly one at a time, and are not replaced.
What is P(purple then black)?

Accepted Answer

1/18

Answer

2/5

Answer

3/7

Answer

4/9

Question 45

In an AP Statistics class, 57% of students eat breakfast in the morning, 80% of them floss their teeth, and 46% of the students do both.  What is the probability that a randomly chosen student eats breakfast but does not floss their teeth?

Accepted Answer

11%

Answer

9%

Answer

34%

Answer

91%

Question 46

In an AP Statistics class, 57% of students eat breakfast in the morning, 80% of them floss their teeth, and 46% of the students do both.  What is the probability that a randomly chosen student eats breakfast or flosses their teeth?

Accepted Answer

91%

Answer

9%

Answer

11%

Answer

34%

Question 47

There are 6 red marbles, 5 green marbles, and 4 yellow marbles in a bag. If Joe picks 2 marbles one after the other without replacement, then what is the probability that both are red in color?

Accepted Answer

1/7

Answer

2/5

Answer

1/21

Answer

4/25

Question 48

P(Sandals|Pants):

Accepted Answer

2/7

Answer

4/20

Answer

6/15

Answer

1/2

Question 49

A probability near 1 is _______.

Accepted Answer

very likely to happen

Answer

never going to happen

Answer

probably never going to happen

Answer

equally likely to happen

Question 50

Probability can be expressed as a number between_____ and _____.

Accepted Answer

0 and 1

Answer

0 and 100

Answer

0 and 10

Answer

-1 and 1

Question 51

I conduct a survey by splitting the school by grade, then asking 100 Freshmen, 100 Sophomores, 100 Juniors, and 100 Seniors.  Is this method:

Accepted Answer

Stratified

Answer

Clustered

Answer

Self-Selected

Answer

Random

Question 52

Ms. Jeffries samples her class by selecting all students sitting at group 1 and group 5 in her classroom. This sampling technique is called?

Accepted Answer

Cluster

Answer

Simple

Answer

Stratified

Answer

Systematic

Question 53

Disneyland often surveys its guests as they exit a restaurant during their visit. The surveyor stands at the restaurant exit, counts the number of people leaving, and surveys every 25th guest.

This is a form of:

Accepted Answer

Systematic Random Sampling

Answer

Simple Random Sample

Answer

Systematic Random Sample

Answer

Voluntary Response

Question 54

Which restaurant has a higher median wait time?

Accepted Answer

Lucy's Steakhouse

Answer

Gary's Grill

Answer

They are the same

Question 55

What is the IQR of the Cruisers?

Accepted Answer

6

Answer

4

Question 56

Find the median, first quartile, third quartile, and interquartile range of the data.

32, 53, 72, 66, 47, 54, 49, 67, 71

Accepted Answer

Median: 54

First Quartile: 48

Third Quartile: 69

IQR: 21

Answer

Median: 54

First Quartile: 49

Third Quartile: 67

IQR: 18

Answer

Median: 54

First Quartile: 48

Third Quartile: 69

IQR: 22

Answer

Median: 54

First Quartile: 49

Third Quartile: 69

IQR: 20

Question 57

Students are asked to name their favorite type of video game.

Accepted Answer

Categorical

Answer

Change over time

Answer

Numerical

Question 58

A marketing survey compiled data on the number of cars in households. If X = the number of cars in a randomly selected household, and we omit the rare cases of more than 5 cars, then X has the following probability distribution:
X 0 1 2 3 4 5
P(X) 0.24 0.37 0.20 0.11 0.05 0.03
What is the probability that a randomly chosen household has at least two cars?

Accepted Answer

0.39

Answer

0.20

Answer

0.29

Answer

0.61

Question 59

What happens to the shape of a sampling distribution of sample means as n increases?

Accepted Answer

It becomes narrower and more normal.

Answer

It becomes narrower and bimodal.

Answer

It becomes wider and skewed right.

Answer

It becomes wider and more normal.

Question 60

At a particular college, 78% of all students are receiving some kind of financial aid.The school newspaper selects a random sample of 100 students and 72% of the respondents say they are receiving some sort of financial aid. Which of the following is true?

Accepted Answer

78% is a parameter and 72% is a statistic

Answer

78% is a population and 72% is a sample.

Answer

72% is a population and 78% is a sample

Answer

72% is a parameter and 78% is a statistic

Question 61

When p-value is greater than alpha we:

Accepted Answer

Fail to reject Ho

Answer

Accept Ho

Answer

Accept Ha

Answer

Reject Ho

Question 62

What does it mean when a test is statistically significant?

Accepted Answer

the test statistic had a P-value lower than the alpha level

Answer

it has reached alpha level status

Answer

the test statistic had a P-value higher than the alpha level

Answer

it is important in practical terms

Question 63

Describe the correlation in the graph shown.

Accepted Answer

Strong Positive

Answer

Strong Negative

Answer

Weak Negative

Answer

Weak Positive

Question 64

The drama teacher wants to determine where the drama club should go to celebrate their final performance. Which of the following is NOT a representative sample?

Accepted Answer

Students who appear in the first act

Answer

Every 4th student selected from an alphabetical roster of the club

Answer

Students whose names are randomly selected from a hat

Marking Period 4 Extra Credit

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