Five years ago, a survey found that the proportion of city employees who commute to work by car is 8%. a local city commissioner claims that the percentage is higher than it was five years ago. data on employee commuting by car was collected on a random sample of 1000 employees and found 12% of employees commute by car. test an appropriate hypothesis and state your conclusion at the 10% level of significance.

The data shows a proportion in car commuting greater than 8%

Step-by-step explanation:

Five years ago, a survey found that the proportion of city employees who commute to work by car is 8%.

Claim : . A local city commissioner claims that the percentage is higher than it was five years ago.

A random sample of 1000 employees was collected

n = 1000

They found 12% of employees commute by car.

No. of employees commute by car =

We will use one sample proportion test  

x= 120

n = 1000

Formula of test statistic =

                                       =

                                       =

Significance level = 10%

α=0.1

(Using z table)

So, test statistic i.e.Z calculated > Z critical

So, we failed to accept null hypothesis .The data shows a proportion in car commuting greater than 8%

is means division by fractions

step-by-step explanation:

-22

times both sides by 2, times () by 8, add alile terms, move terms, add alike and caculate divide both sides by 3