3. Using data in question 6, determine whether there is enough evidence to conclude that the type II has higher strength than type I? Use a pooled t-test with a = 0.05. 1. Identify the parameters 2. Null Hypothesis 3. Alternative Hypothesis 4. Test Statistic 5. Rejection Region

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3. Using data in question 6, determine whether there is enough evidence to conclude that the type II has
higher strength than type I? Use a pooled t-test with a = 0.05.
1. Identify the parameters
2. Null Hypothesis
3. Alternative Hypothesis
4. Test Statistic
5. Rejection Region
6. Conclusion
Transcribed Image Text:3. Using data in question 6, determine whether there is enough evidence to conclude that the type II has higher strength than type I? Use a pooled t-test with a = 0.05. 1. Identify the parameters 2. Null Hypothesis 3. Alternative Hypothesis 4. Test Statistic 5. Rejection Region 6. Conclusion
6. The maintenance cost (y in dollars) and the age of (x in years) of nine cash registers in a department store
is given in the following table.
sum
7
1
3
5
4
2
92
181
23
40
126
35
86
72
51
Xy
a. Complete the above table and find the sum of each row.
b. Draw the scatter plot. Is there a linear trend?
200
150
с.
Find the S, Sw, and Swy.
у 100
50
10
d. Find the Pearson's correlation coefficient.
Transcribed Image Text:6. The maintenance cost (y in dollars) and the age of (x in years) of nine cash registers in a department store is given in the following table. sum 7 1 3 5 4 2 92 181 23 40 126 35 86 72 51 Xy a. Complete the above table and find the sum of each row. b. Draw the scatter plot. Is there a linear trend? 200 150 с. Find the S, Sw, and Swy. у 100 50 10 d. Find the Pearson's correlation coefficient.
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