Reference no: EM131634212

Problem 1:

(Hottest Places on Earth)

Death Valley in Eastern California and Al-Aziziyah in Libya are commonly recognized as two of the hottest places on Earth. A meterologist is interested in whether summer temperatures differ between Death Valley and Al-Aziziyah. She records the temperature on 8 randomly selected summer days in Death Valley, and 9 randomly selected summer days in Al-Aziziyah. She obtains the following results (in Fahrenheit):

Death Valley:

117.1

120.2

125.3

115.5

116.6

114.1

122.9

119.2

Al-Aziziyah:

103.2

120.1

117.5

101.8

115.4

118.7

106.2

124.1

103.7

Question:

Do summer temperatures differ between Death Valley and Al-Aziziyah?

(a) We will first use a 2 sample t test to address this question.

Verify that we will use the unpooled scenario here.

(b) Conduct a 2 sample t test. Use α= 0.1.

(c) Use a Wilcoxon-Mann-Whitney Test to address the above question. Use α= 0.1.

(d) Which test is more appropriate to use here? Explain your answer.