Determine the critical value zc and the z score value based on the sample data? a. The critical value zc = 1.99 The z score value based on the sample data = 1.62 b. The critical value zc = 1.96 The z score value based on the sample data
The average weekly earnings of a production worker in 2000 were AUD425. Suppose a labor researcher wants to test to determine whether this figure is still accurate today. The researcher randomly selects 50 production workers and obtains a representative earnings statement for one week from each. The resulting sample average is AUD431.0.
Assuming a population standard deviation of AUD32.2, and a 5% level of significance, determine whether the mean weekly earnings of a production worker have changed.
Determine the critical value zc and the z score value based on the sample data?
a.
The critical value zc = 1.99 The z score value based on the sample data = 1.62
b.
The critical value zc = 1.96 The z score value based on the sample data = 1.32
c.
The critical value zc = 1.92 The z score value based on the sample data = 1.52
d.
The critical value zc = 1.96 The z score value based on the sample data = 2.32
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