The mean breaking strength of yarn used in manufacturing drapery material is required to be at least 100 psi. Past experience has indicated that the standard deviation of breaking strength is 2.3 psi. A random sample of 9 specimens is tested, and the average breaking strength is found to be 100.6 psi. Calculate the P-value

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

in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

hope it

srry idk

step-by-step explanation: