In this year, a random sample of size 45 returns is selected for review. Describe the approximated distribution of the sample mean (shape, center, and spread).

Compare these two waves: the blue and orange waves have the same pitch, but the blue wave is louder. the blue and orange waves have the same volume, but the blue wave has a higher pitch. the orange wave has a higher pitch, but the blue wave is louder. the blue wave has a higher pitch, but the orange wave is louder.

You are a clerk at convenience store. a customer owes 11.69 for a bag of potatoes chips. she gives you a five dollar bill. how much change should the customer receive?

Ben is three times as old as samantha, who is two years older than half of michel's age. if michel is 12. how old is ben?