If a sample of 50 people from this region is selected, what is the probability In a study of the life expectancy of 400 people in a certain geographic region, the mean age death was 70 years, and the standard deviation was 5.1 years. that the mean life

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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In a study of the life expectancy of 400 people in a certain geographic region,
If a sample of 50 people from this region is selected, what is the probability
the mean age death was 70 years, and the standard deviation was 5.1 years.
that the mean life <pectancy wil! be less than 68 years?
1.
Step 1: Identity the parts of the problem.
Given: 1-2.
3-4.
5-6.
7-8.
Find:
9-10.
Step 2: Use the formula to find the z-score.
Z = -u
In
11-14. Substitute the values in the formula.
15-17. Write the z-score.
Transcribed Image Text:In a study of the life expectancy of 400 people in a certain geographic region, If a sample of 50 people from this region is selected, what is the probability the mean age death was 70 years, and the standard deviation was 5.1 years. that the mean life <pectancy wil! be less than 68 years? 1. Step 1: Identity the parts of the problem. Given: 1-2. 3-4. 5-6. 7-8. Find: 9-10. Step 2: Use the formula to find the z-score. Z = -u In 11-14. Substitute the values in the formula. 15-17. Write the z-score.
Step 3: Use the z-table to look up the z-score you calculated in Step 2.
18-20. Corresponding area
Step 4: Draw a graph and plot the z-score and its corresponding area. The
Label and shade the part that you're looking for. (21-30):
Step 5: Subtract your score from 0.500.
31-33.
Step 6: Convert the decimal in Step 5 to a percentage.
34-35.
Conclusion (36-40):
Transcribed Image Text:Step 3: Use the z-table to look up the z-score you calculated in Step 2. 18-20. Corresponding area Step 4: Draw a graph and plot the z-score and its corresponding area. The Label and shade the part that you're looking for. (21-30): Step 5: Subtract your score from 0.500. 31-33. Step 6: Convert the decimal in Step 5 to a percentage. 34-35. Conclusion (36-40):
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