Data Session 3 Solutions

A B C D
Homework

Solutions for Session 3, Homework

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

Problem H1

<< 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

Session 3 | Notes | Solutions | Video