Question: It is generally believed that electrical problems affect about 14% of new cars. An automobile mechanic conducts diagnostic tests on 128 randomly selected new cars
It is generally believed that electrical problems affect about 14% of new cars. An automobile mechanic conducts diagnostic tests on 128 randomly selected new cars on the lot.
Let's say success = a car has an electrical problem failure = a car does not have an electrical problem
The conditions have been met to use a normal model. Let's say you are testing the hypotheses: H0: p =0.18 (18% of all cars have electrical problems) HA: p<0.18 (less than 18% of all cars have electrical problems)
and you get a p-value of 0.119. You are testing with an alpha alpha=0.05. State your conclusion by writing a sentence like "with a p-value of 0.119 I (fail or fail to reject) the null hypothesis that the proportion of cars with electric problems is equal to 18%." After stating your conclusion, make a sentence as to why you made that conclusion and what it means about the proportion of cars with electrical problems.
Step by Step Solution
There are 3 Steps involved in it
Get step-by-step solutions from verified subject matter experts
