Your model locomotive is
16
16
inches long. it is an exact model of a locomotive that is
40
40
feet long. a window on the locomotive is how many times wider than a window on the model?

Now, martin can reasonably guess that the standard deviation for the entire population of people at the mall during the time of the survey is $1.50. what is the 95% confidence interval about the sample mean? interpret what this means in the context of the situation where 95 people were surveyed and the sample mean is $8. use the information in this resource to construct the confidence interval.