Some sources report that the weights of full-term newborn babies in a certain town have a mean of 8 pounds and a standard deviation of 1.2 pounds and are normally distributed. a. What is the probability that one newborn baby will have a weight within 1.2 pounds of the meanlong dashthat is, between 6.8 and 9.2 pounds, or within one standard deviation of the mean? b. What is the probability that the average of nine babies' weights will be within 1.2 pounds of the mean; will be between 6.8 and 9.2 pounds? c. Explain the difference between (a) and (b).

The null and alternate hypotheses are: h0: μ1 ≤ μ2 h1: μ1 > μ2 a random sample of 22 items from the first population showed a mean of 113 and a standard deviation of 12. a sample of 16 items for the second population showed a mean of 99 and a standard deviation of 6. use the 0.01 significant level. find the degrees of freedom for unequal variance test. (round down your answer to the nearest whole number.) state the decision rule for 0.010 significance level. (round your answer to 3 decimal places.) compute the value of the test statistic. (round your answer to 3 decimal places.) what is your decision regarding the null hypothesis? use the 0.01 significance level.