Each member of a random sample of 18 business economists was asked to predict the rate of inflation for the coming year.

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answerhappygod
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Each member of a random sample of 18 business economists was asked to predict the rate of inflation for the coming year.

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Each member of a random sample of 18 business economists was
asked to predict the rate of inflation for the coming year. Assume
that the predictions for the whole population of business
economists follow a normal distribution with standard deviation
1.9​%.
a. The probability that the sample standard deviation is bigger
than 0.01.
b. The probability that the sample standard deviation is less
than 0.001
c. The probability that the sample standard deviation is
between​ 0% and what percentage is 0.95.
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