Determine the p-value for testing: H0: µ = 15 Ha: µ > 15 when a random...

Determine the p-value for testing: H₀: µ = 15

H_a: µ > 15

when a random sample of size 18 was taken from a normal population whose standard deviation is unknown and the value of the test statistic equals 2.35.

The 98% confidence interval for the population proportion of successes when a random sample of size 80 was taken from a very large population and the number of successes in that sample was counted to be 20. No concluding statement is required.

Expert Solution

a.

Degrees of freedom = df = n - 1 = 18 - 1 = 17

t = 2.35

We can use Excel function "TDIST()" as :

P-value = 0.0156

b.

98% confidence interval : ( 0.137 , 0.363 )

orchestra answered 2 years ago

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