Question

The FDA has established that the concentration of a pesticide in apples may not exceed 10 parts per billion (ppb). A random sample of 25 apples from a major orchard had an average pesticide content of 9.9 ppb, with a standard deviation of 0.5 ppb. The calculated t-statistic is 1, with an associated P-value for the one-tailed test of 0.164.

The mean concentration of a pesticide of the samples=

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The standard deviation is =

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The sample size, n, is =

The t-statistic is =
a.)|9.9-10|/0.5.
b.)|9.9-10|/ (0.5/25).
c.)|9.9|/0.5.
d.)|9.9-10|/(0.5/5)

What is the null hypothesis?
a.)The population mean of concentration of a pesticide in apples is equal to or less than 10 ppb.
b.)The sample mean of concentration of a pesticide in apples is equal to or greater than 10 ppb.
c.)The population mean of concentration of a pesticide in apples is equal to or greater than 10 ppb.
d.)The sample mean of concentration of a pesticide in apples is equal to or less than 10 ppb.

Incorrect.

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