A scientist cannot read a data point in a list of weights of newborn babies. The report, however, notes that the median weight is 8.6. What is the missing weight? 7.6 8.1 ____ 8.8 8.8 8.9 a. 8.1 b. 8.4 c. 8.6 d. 8.8
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The median of 6 numbers is the average of the 3rd and 4th values when sorted. Show more…
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Find the indicated measure: 5) The weights (in pounds) of 30 newborn babies are listed below. Find P16: 5.5 5.7 5.8 5.9 6.1 6.1 6.4 6.4 6.5 6.6 6.7 6.7 6.7 6.9 7.0 7.0 7.0 7.1 7.2 7.2 7.4 7.5 7.7 7.7 7.8 8.0 8.1 8.1 8.3 8.7 A) 4.8 lb B) 6.0 lb C) 5.9 lb D) 6.1 lb
Sri K.
The U.S. National Center for Health Statistics complies birth statistics and publishes the results in vital statistics of the United States. The Center has historically believed that the mean of all newborns in the U.S. has been no less than 6.95 pounds. A sample of babies is selected so that the center can revise its belief. The following birth weights, in pounds are recorded: 7.4, 6.0, 8.6, 4.5, 2.0, 7.9, 4.0, 2.6, 5.9, 7.3, 7.3, 7.0, 6.3, 8.1, 7.1, 7.3, 6.6, 5.2, 9.8, 8.0, 10.9, 6.5, 3.8, 5.0, 8.0 d). Estimate with 95% confidence the mean weight of all newborns in the U.S. e). Using the estimation in (d), is there sufficient evidence to refute the Center’s belief? Explain carefully.
Adi S.
You are conducting a test to see if the weights of newborn babies in NYC are 8 pounds. We know that x, the weight at your hospital, is equal to the expected population mean of a normal distribution with a mean of 0. You randomly pull data for 36 babies and discover that the average weight is 7.8 pounds. You are concerned that the newborns at your hospital are different from the expected population mean and seek to assess if the weight at your hospital is different from 8 pounds. Assuming a two-tail test, with alpha 0.05, what is the test statistic? a. -1.69 b. -2.89 c. 2.35 d. 1.49
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