Construct and Interpret a CI for a mean

Contains data on a random sample of "For Sale" used cars in the Sunday classified ads in the Dayton Daily news. Each row of the worksheet provides information on the following: Year: Car was manufactured

MPGH: MPG on the Highway

MPGC: MPG in the City Price: In thousands of dollars

Safety: Rating of High, Medium, or Low

Type: Compact, SUV, or Truck

Condition Check:

Random: Yes

229 < 10% : Yes

NNC :

One sample proportion confidence interval:

Outcomes in : Safety

Success : H

p : Proportion of successes

Method: Standard-Wald

99% confidence interval results:

Variable

Safety

Count

30

Total

63

Sample Prop.

0.47619048

Std. Err.

0.062922616

L. Limit

0.31411256

U. Limit

0.6382684

Analysis

The above CI proportion was done on the used car data sheet. The results show that we are 99% confident that between 31% and 63% of cars were considered to be highly safe.

I NEED YOU CHECK THE CONDITION FOR CI FOR A MEAN