Question

a.

A sample of n sludge specimens is selected and the pH of each sample is determined. The one-sample t test will then be used to see if there is compelling evidence for concluding that the true average pH is less than 7.0. What is the p-value for the following data (to three decimals)?

n=6, t=0.7, α=0.05

b.

A manufacturer of nickel-hydrogen batteries randomly selects 100 nickel plates for test cells, cycles them a specified number of times, and determines that 14 of the plates have blistered. If it is really the case that 15% of all plates blister under these circumstances and a sample size of 100 is used, how likely is it that the null hypothesis of part (a) will not be rejected (to 4 decimal places). (The probability of making a type 2 error when the true value of p = 0.15)

Answer 1

To test; Ho: M = 7.0 US Hi e c70 n=6gt = 0.7 ; x = 0.05 value = p Po [t<oit ; toto - 0.742 Anyay or 742