1. In a normal distribution, the mean is at the percentile. 2. Approximately
% of the scores in a normal distribution are within two standard deviations of
the mean.
3. On a math test, Chris scored at the 85th percentile. Which statement is true?
(1) Eighty-five percent of the students who took the test had the same score as Chris.
(2) Fifteen percent of the students had scores equal to or less than Chris.
(3) Eighty-five percent of the students who took the test had scores equal to or less than Chris.
(4) Chris scored 85% on the test.
4. The scores of a math class on a statistics exam were as follows:
72
76
91
74
83
79
93
85
97
91
89
81
87
88
86
94
84
Using intervals of 71-75, 76-80,..., construct a frequency and cumulative frequency table for the
data
Interval
Frequency
Cumulative
Frequency
5. Consider the following table, what shape would the bell curve take if graphed?
Goals Scored
0
1
2
3
4
5
6
7
Frequency
4
8
5
3
1
1
0
1

Every weekday, mr. jones bikes from his home to his job. sometimes he rides along two roads, the long route that is shown by the solid lines. other times, he takes the shortcut shown by the dashed line. how many fewer kilometers does mr. jones bike when he takes the shortcut instead of the long route?

In a test for esp (extrasensory perception), the experimenter looks at cards that are hidden from the subject. each card contains either a star, a circle, a wave, a cross or a square.(five shapes) as the experimenter looks at each of 20 cards in turn, the subject names the shape on the card. when the esp study described above discovers a subject whose performance appears to be better than guessing, the study continues at greater length. the experimenter looks at many cards bearing one of five shapes (star, square, circle, wave, and cross) in an order determined by random numbers. the subject cannot see the experimenter as he looks at each card in turn, in order to avoid any possible nonverbal clues. the answers of a subject who does not have esp should be independent observations, each with probability 1/5 of success. we record 1000 attempts. which of the following assumptions must be met in order to solve this problem? it's reasonable to assume normality 0.8(1000), 0.2(1000)%30 approximately normal 0.8(1000), 0.2(1000)% 10 approximately normal srs it is reasonable to assume the total number of cards is over 10,000 it is reasonable to assume the total number of cards is over 1000

Ineed with the quizzes in apex mathematics ii