The customer service desk at Company X answers phone calls i

The customer service desk at Company X answers phone calls in an average of 5 minutes (H0: =5 ). After instituting a new training program, the company believes that the average time to answer a call has decreased (HA: <5 ). The company specifies a significance level of 5% (0.05). The power of the test when, in reality, =3 is 0.85. Before the sample is collected, the probability that the analyst fails to reject the null hypothesis when, in reality, =3, is equal to ______ (Blank 1). Similarly, the probability that the analyst rejects H0 when, in reality, =5, is equal to_____ (Blank 2). Use two decimal places

Solution

1. This is the probability of a type II error, is beta.

beta = 1 - power = 1 - 0.85 = 0.15 [ANSWER]

****************

2.

This is the significance level alpha, the probability of a type I error,

alpha = 0.05 [ANSWER]