Michael wants to get an 88 average for his tests. he currently has an 86, 86, 86, 90, 89 as his test grades. what grade must michael get on the last test to have at least an 88 average

Thompson and thompson is a steel bolts manufacturing company. their current steel bolts have a mean diameter of 127 millimeters, and a variance of 36. if a random sample of 35 steel bolts is selected, what is the probability that the sample mean would differ from the population mean by greater than 0.5 millimeters? round your answer to four decimal places.

For f(x) = 3x+1 and g(x) = x2 - 6, find (g/f)(x)

Scores on the cognitive scale of the bayley-scales of infant and toddler development range from 1 to 19, with a standard deviation of 3. calculate the margin of error in estimating the true mean cognitive scale score, with 99% confidence, if there are 12 infants and toddlers in a sample.