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Learning Math Home
Data Session 3 Solutions
 
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Solutions for Session 3, Homework

See solutions for Problems: H1 | H2 | H3 | H4 | H5 | H6


Problem H1

Interval

Frequency for Interval

30 to < 35

2

35 to < 40

2

40 to < 45

1

45 to < 50

0

50 to < 55

6

55 to < 60

11

60 to < 65

9

65 to < 70

9

70 to < 75

4

75 to < 80

3

80 to < 85

1

85 to < 90

3

90 to < 95

1

<< back to Problem H1


 

Problem H2

bar graph estimates of a minute

<< back to Problem H2


 

Problem H3

Interval

Relative Frequency

Fraction

Decimal

%

30 to < 35

2/52

.059

3.8

35 to < 40

2/52

.118

3.8

40 to < 45

1/52

.038

1.9

45 to < 50

0/52

.038

0.0

50 to < 55

6/52

.019

11.5

55 to < 60

11/52

.000

21.2

60 to < 65

9/52

.115

17.3

65 to < 70

9/52

.212

17.3

70 to < 75

4/52

.173

7.7

75 to < 80

3/52

.173

5.8

80 to < 85

1/52

.077

1.9

85 to < 90

3/52

.058

5.8

90 to < 95

1/52

.019

1.9

<< back to Problem H3


 

Problem H4

Interval

Cumulative Frequency

Relative Cumulative Frequency

Fraction

%

30 to < 35

2

2/52

3.8

35 to < 40

4

4/52

7.7

40 to < 45

5

5/52

9.6

45 to < 50

5

5/52

9.6

50 to < 55

11

11/52

21.2

55 to < 60

22

22/52

42.3

60 to < 65

31

31/52

59.6

65 to < 70

40

40/52

76.9

70 to < 75

44

44/52

84.6

75 to < 80

47

47/52

90.4

80 to < 85

48

48/52

92.3

85 to < 90

51

51/52

98.1

90 to < 95

52

52/52

100

<< back to Problem H4


 

Problem H5

All of the response times are between 30 and <95 seconds. There is a concentration of responses (42 of 52) between 50 and < 80 seconds. The most frequently occurring interval is from 55 to < 60 seconds, followed by both 60 to < 65 seconds and 65 to < 70 seconds.

<< back to Problem H5


 

Problem H6

Yes, questions (g) and (h) can now be answered, since the intervals are broken up by fives. The only question that still cannot be answered is (i), the percentage of responses that are equal to 60 seconds.

<< back to Problem H6


 

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