A random sample of 25 items is drawn from a population whose standard deviation is unknown. The sample mean is I -850 and the sample standard deviation is s = 15. Use Appendix D to find the values of Students t. a. construct an interval estimate of y (but backward) with 95% confidence. (Round your answers to 3 decimal places.) b. construct an interval estimate of y ("") with 95% confidence assuming s = 30. ( round answer to 3 decimal place) c. construct an interval estimate of y ("") with 95% confidence, assuming that s =60. (round answer to 3 decimal place)

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
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ISBN:9780079039897
Author:Carter
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Chapter10: Statistics
Section: Chapter Questions
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A random sample of 25 items is drawn from a population whose standard deviation is unknown. The sample mean is I -850 and the sample standard deviation is s = 15. Use Appendix D to find the values of Students t.

a. construct an interval estimate of y (but backward) with 95% confidence. (Round your answers to 3 decimal places.)

b. construct an interval estimate of y ("") with 95% confidence assuming s = 30. ( round answer to 3 decimal place)

c. construct an interval estimate of y ("") with 95% confidence, assuming that s =60. (round answer to 3 decimal place)

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