109 parts made from alloy 1 and 49 parts made from alloy 2 were subjected to stress tests. 18 parts from alloy 1 and 13 parts from alloy 2 did not pass the test. Can we reject the hypothesis that the proportion of nonpassing parts from alloy 1 is at least as large as the proportion of nonpassing parts from alloy 2 at a= 0.01? assume independent samples.

**Question 1.** For the hypothesis stated above ( in terms of alloy1- alloy2):

** Part A)** What is the decision rule? **Fill in only one of the following statements depending if the hypothesis is One tailed or Two tailed**

if the hypothesis is one tailed:

Reject Ho ____ ( zcrit/ t crit/ z stat/ t stat) _____ (< , >, = , <=, >= ) ____ (Answer for this blank must be typed to either 2 or 3 decimals depending on whether the z or t table is appropriate)

if the hypothesis is two tailed:

Reject Ho if ____ (Z crit/ t crit/ z stat/ t stat) < ______ or ________ > _______

**Question 2.** Find the 99% confidence interval ( in terms of alloy2- alloy1). ******* Please, Answer must be typed to four decimals******

Left Endpoint = ________

Right Endpoint = ________

#### Top Answer

(A) If the hypothesis is one tailed, Reject H 0 if z = √ n 1 P 1 ( 1 − P... View the full answer