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If a teacher wants to test her belief that more than 5 students in college classes typically receive A as a grade, she'll perform?
a. two tailed testing of a mean
b. two tail testing of a proportion
c. one tail testing of a proportion
d. one tail testing of a mean

I choose this correct???

  • statistics -

    You are testing one tail.

  • statistics -

    The time spent (in days) waiting for a heart transplant in two states for patients with type A+ blood can be approximated by a normal distribution, as shown in the graph to the right. mean of =128 Standard deviation of=23.3

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