A random sample of 100,000 credit sales in a department store showed an average sale of $87. 25. From past data, it is known that the standard deviation of the population is $20. 0. What is the 95% confidence interval of the population mean?.

Jim has found that he must consume 2,300 calories a day to reach his health goals, but he doesn't want to give up his afternoon snack of pretzels. unfortunately, he tends to eat the entire bag — which amounts to 1,300 calories! what strategy should jim use to improve his habits?

How many liters of 60% alcohol solution should be added to 40 liters of a 20% alcohol solution to make a 50% solution?

Which of the following is not a component of your high school transcripts? a. courses you have enrolled in for the current year b. courses you have completed c. your cumulative gpa d. varsity sports you have played