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A recent survey indicated that the average amount spent for breakfast by business managers was $7.58 with a standard deviation of $0.42. It was felt that breakfasts on the West Coast were higher than $7.58. A sample of 81 business managers on the West Coast had an average breakfast cost of $7.65. 13. At a = 0.05, what is the test value?
a. -1.5
b. 1.96
c. 1.64
d. 1.5
The populations must all be normally distributed, what is meant by normally distributed?
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