Math  /  Data & Statistics

QuestionThe weights for newborn babies is approximately normally distributed with a mean of 6.7 pounds and a standard deviation of 2 pounds.
Use the Cumulative Z-Score Table to answer the questions below. Write your answers rounded to the nearest whole number.
Consider a group of 1000 newborn babies: - How many would you expect to weigh between 2.9 and 6.4 pounds? \square - How many would you expect to weigh less than 3.9 pounds? \square Enter an integer or decimal number more.I - How many would you expect to weigh more than 6.5 pounds? \square - How many would you expect to weigh between 6.7 and 8.3 pounds? \square

Studdy Solution
Calculate the expected number of babies weighing between 6.7 and 8.3 pounds: 0.2881×1000=2880.2881 \times 1000 = 288
The expected numbers are: - Between 2.9 and 6.4 pounds: 412 \boxed{412} - Less than 3.9 pounds: 81 \boxed{81} - More than 6.5 pounds: 540 \boxed{540} - Between 6.7 and 8.3 pounds: 288 \boxed{288}

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