a.
To find: The test statistic
a.
Answer to Problem 68E
The test statistic is -3.094.
Explanation of Solution
Given:
Sample mean
Sample standard deviation ( s ) = 1.6
Formula used:
The test statistic is:
Calculation:
The test statistic can be calculated as:
Hence, the value is -3.094.
b.
To find: The P -value.
b.
Answer to Problem 68E
The P -value is 0.016.
Explanation of Solution
Degree of freedom is n -1 = 50-1 = 49
The P -value is calculated as:
Now, the P -value by using Ti-83 plus is:
The P -value is 0.0016.
Chapter 9 Solutions
The Practice of Statistics for AP - 4th Edition
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