From an industrial area 70 companies were selected at random and 45 of them were panning for expansion next year. Find 95% confidence limit for the proportion of companies planning for expansion?

Confidence limit = [52.8%, 75.2%]

Step-by-step explanation:

±

where the value will be taken from the z-table for 95% confidence interval

1-0.95= 0.05/2= 0.025

0.95+0.025= 0.0975

From the z-table the value of corresponding to 0.0975 is 1.96

±

±

±

% ± %

so the confidence interval is

%

%

47

step-by-step explanation:

45

step-by-step explanation: