Determine the 97% confidence limits for an estimate of the mean di-

ameter of all the rivets produced by the machine in a day

An energy drink company claims that its product increases students' memory levels. to support its claims, the company issues advertisements claiming that 8 out of 10 people (chosen randomly from across the country) who tried their product reported improved memory. the missing component in this study is a .

Given the expression (7 ? 4i) ? (2 + 6i), perform the indicated operation and write the answer in the form a + bi.

If np3 /nc2 = 6, find the value of n