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To teat Ho: u = 20 versus H1: u< 20, a simple random sample of size...

To teat Ho: u = 20 versus H1: u< 20, a simple random sample of size n=20 is obtained from a population that is known to be normally distributed. Answer parts B through D.
(a) if x=18.2 and s=3.8. Test statistic is -2.12
(b)- Draw a t-distribution with thearea that represents the P-value shaded. Which of the following graphs show the correct shaded region?

Approximate the P-value. Choose the correct range for the P-value below.
A- 0.10< P-value <0.15
B- 0.02< P-value<0.025
C- 0.05<P-value<0.05

Solutions

Expert Solution

Here using ti-83 calculator.

a)

b)

P-value = 0.0238

milcah answered 9 months ago
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