Zachary inspects staplers at the factory. last month. he inspected 3,000 staplers at random and found that 12 did not work properly. the factory manufactures 15,000 staplers each month. based on the sample, how many staplers could not be expected to work properly each month?

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.