Question

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The lengths of pregnancy terms for a particular species of mammal are nearly normally distributed about a mean pregnancy length with a standard deviation of 17 days. About what
percentage of births would be expected to occur within 34 days of the mean pregnancy length?
(...)
About% of births would be expected to occur within 34 days of the mean pregnancy length.
(Type an integer or a decimal. Round to two decimal places as needed.)

Answer 1

To find the percentage of births expected to occur within 34 days of the mean pregnancy length, calculate the z-score and refer to the standard normal distribution table.

Step-by-step explanation:

To find the percentage of births expected to occur within 34 days of the mean pregnancy length, we need to calculate the z-score and use the standard normal distribution table. The formula to calculate the z-score is: z = (x - mean) / standard deviation. In this case, x = 34, mean = mean pregnancy length, and standard deviation = 17. Once we have the z-score, we can refer to the standard normal distribution table to find the corresponding percentage.

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