QUESTION 6 The mean diameter of a ball bearing produced by a certain manufacturer is 0.50 cm with a standard deviation of 0.02 cm. A sample of 25 ball bearings is randomly selected from a production run. The sample had a mean of 0.50004 and a median 0.49714. What is the standard error for the sample mean? O A. 0.004 O B. 0.0004 O C. 0.4 O D. 0.04 O E. 0.00004 QUESTION 7 A sample of 36 is taken from a population that is normally distributed with mean 15 and standard deviation 3. What is the probability that the sample mean will be more than 15.97? O A. 0.6268 O B. 0.9378 DELL PrtScr F9 F10 F11 F6 F7 F8 F2 F3 F4 F5

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