Answer:
The P-value is 0.2177.
Step-by-step explanation:
Test statistic (z) = (sample mean - population mean) ÷ (sd/√n)
sample mean = 100.6 psi
population mean = 100 psi
population sd = 2.3 psi
n is sample size = 9
z = (100.6 - 100) ÷ (2.3/√9) = 0.6 ÷ 0.767 = 0.78
From the standard normal distribution table, the cumulative area of the test statistic is obtained by taking the value of 0.7 under 0.08. The cumulative area is 0.7823.
P-value = 1 - 0.7823 = 0.2177
