Roselyn is driving to visit her family, which lives 150 kilometers away. Her average speed is 60 kilometers per hour. The car's
2 answers:
You might be interested in
Answer: A. z = -2.57
Step-by-step explanation:
Let p be the population proportion of people polled favor the incumbent.
As per given , we have
Sample size : n= 1030
sample proportion :
Test statistic for proportion :
Hence, the test statistic is z = -2.57 .
Thus , the correct answer is A. z = -2.57 .