Question
QUESTION 8 Listed below are time intervals(min) between eruptions of a geyser. Assume that therecent times are within the past fewyears, thepast times are from
QUESTION 8
Listed below are time intervals(min) between eruptions of a geyser. Assume that the"recent" times are within the past fewyears, the"past" times are from around 20 yearsago, and that the two samples are independent simple random samples selected from normally distributed populations. Do not assume that the population standard deviations are equal. Does it appear that the mean time interval haschanged? Is the conclusion affected by whether the significance level is 0.10 or 0.01?
Recent
78
92
88
79
56
99
61
88
70
89
83
84
56
80
73
101
61
Past
90
88
93
94
63
84
84
92
86
91
88
91
88 91
Let 1 be the recent times and let
2 be the past times. What are the null and alternativehypotheses?
A.
H0: 12
H1: 1=2
B.
H0:1<2
H1:1=2
C.
H0:1s=2
H1:1>2
D.
H0:1=2
H1:12
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Discovering Advanced Algebra An Investigative Approach
Authors: Jerald Murdock, Ellen Kamischke, Eric Kamischke
1st edition
1559539844, 978-1604400069, 1604400064, 978-1559539845
