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Babies: A sample of 25 one-year-old girls had a mean weight of 24.1 pounds with a standard deviation of 4.3 pounds. Assume that the population of weights is normally distributed. A pediatrician claims that the standard deviation of the weights of one-year old girls is less than 4 pounds. Do the data provide convincing evidence that the pediatrician's claim is true? Use the a = 0.05 leve of significance. Part: 0 / 5 Part 1 of 5 State the appropriate null and alternate hypotheses. Ho:5 (Choose one) H : (Choose one) This hypothesis test is a (Choose one) V test