Need help asap for stat homework!

Question 1

1.  If a score of 25 occurred 4 times in a sample of 9, what would it's relative frequency be?

		2.25
		4
		0.444

3.85 points   

Question 2

1.    The following set of data is the height in inches of women age 18 to 24 years old. Create a frequency distribution for the following set of data:

64     67     63     65     66

63     66     62     65     65

60     72     64     61     65

69     64     64     66     61

65     67     65     62     69

62     65     63     64     61

66     64     59     63     65

63     63     68     64     65

66     67     62     62     63

64     70     64     67     65

Press Tab to enter the content editor. For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac). Path:  p Words:0

3.85 points   

Question 3

1.  The proportion of the area under the curve at certain scores and the relative frequency correspond.

		False
		True

3.85 points   

Question 4

1. How is the relative frequency of a score calculated?

		By dividing the raw score by N.
		By dividing a score's fruequency by N.
		By dividing N in half.
		By multiplying the percentile by 100.

3.85 points   

Question 5

1.  A teacher finds that a distribution of test scores is negatively skewed. What does this tell the teacher about the difficulty of the test?

		It's too hard.
		It's too easy.

3.85 points   

Question 6

1. The age in months of all first graders would likely produce a distribution that was

		negatively skewed
		symmetrical (normal)
		positively skewed

3.85 points   

Question 7

1. A percentile is defined as

		the percent of all scores in the data above and beyond anything ever expected.
		the percent of all scores in the data below a particular score.
		the frequency of all scores in the data above a particular score.
		the frequency of that particular score.

3.85 points   

Question 8

1.  We want to find out how many people graduates in psychology are the first-born, second-born, or third-born in their families. We believe being first-born is directly related to majoring in psychology. How should we graph the data we collect?

		bar
		frequency polygon
		histogram
		normal bell curve

3.85 points   

Question 9

1.  The age at death of everyone who died in one year would likely produce a distribution that is 

		negatively skewed
		symmetrical (normal)
		positively skewed

3.85 points   

Question 10

1.  Are most scores in a positively skewed distribution directly to the right or the left of the middle score?

		left
		right

3.85 points   

Question 11

1. Distributions can have virtually unlimited shape.  Which is the most important fruequency distribution? 

		skrewed and chopped
		bimodal
		normal
		frequency distribution

3.85 points   

Question 12

1.  The percentage of all scores in the data that are above a particular score is the definition of percentile.

		False
		True

3.85 points   

Question 13

1.  A class scores mostly C's and F's on their first psychology exam. What kind of distribution will this produce?

		positively skewed
		negatively skewed
		normal
		bimodal