A company in Maryland has developed a device that can be attached to car engines,which it believes will increase the miles per gallon that cars will get.The owners are interested in estimating the difference between mean mpg for cars using the device versus those that are not using the device.The following data represent the mpg for independent random samples of cars from each population.The variances are assumed equal and the populations normally distributed. 
Given this data,what is the critical value if the owners wish to have a 90 percent confidence interval estimate?
Definitions:
Recommended Caloric Intake
The amount of calories a person should consume daily based on their age, gender, and activity level to maintain good health.
College Students
Individuals enrolled in institutions of higher learning, often experiencing unique health, social, and developmental challenges and opportunities.
Drinking Soda
The consumption of carbonated soft drinks, which often contain high levels of sugar and calories.
Eating Fruits
The consumption of fruit, which is an essential part of a balanced diet, providing fiber, vitamins, and minerals.
Q4: Use the following regression results to answer
Q32: One of the major oil products companies
Q35: A major U.S.oil company has developed two
Q48: A local pizza company is interested in
Q70: In a hypothesis test,the p-value measures the
Q73: In a situation where we know the
Q85: Recently the State Fish and Game planted
Q86: If a pair of variables have a
Q88: Contingency analysis helps to make decisions when
Q89: A study was recently conducted in which