a. We select a mother at random from this sample of 1,178 mothers. What is the probability that the mother was breastfeeding at six months given that she had an epidural? b. Are having an epidural and breastfeeding at six months independent for this sample of mothers? Explain, using probability rules to justify your answer.

Z4×Z6 has an element of order 24. true or false ?

The breaking strength of a rivet has a mean value of 10,000 psi and a standard deviation of 502 psi. I USE SALT (a) What is the probability that the sample mean breaking strength for a random sample of 40 rivets is between 9,900 and 10,200? (Round your answer to four decimal places.) (b) If the sample size had been 15 rather than 40, could the probability requested in part (a) be calculated from the given information? Explain your reasoning. ○ Yes, the probability in part (a) can still be calculated from the given information. O No, n should be greater than 30 in order to apply the Central Limit Theorem. O No, n should be greater than 20 in order to apply the Central Limit Theorem. ○ No, n should be greater than 50 in order to apply the Central Limit Theorem.

Sh(r)de -