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Find the critical value t for the following situations. a) a 90% confidence interval based on df = 26. b) a 98% confidence interval based on df = 81. Click the icon to view the t-table. a) What is the critical value of t for a 90% confidence interval with df = 26? (Round to two decimal places as needed.)

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Related textbook solutions

Introductory Statistics
OER Edition, 2013
Openstax
ISBN: 9781938168208

Related questions

1. A sample size of n=15 is a simple random sample selected from a normally distributed population. Using Table C, find the critical value t* corresponding to a 95% confidence level in the following scenarios:

a.............to construct a confidence interval 

b..............one-sided hypothesis test 

c..............two-sided hypothesis test

 

 

The breaking strengths of cables produced by a certain manufacturer have a standard deviation of 91 pounds. A random sample of 80 newly manufactured cables has a mean breaking strength of 1750 pounds. Based on this sample, find a 95% confidence interval for the true mean breaking strength of all cables produced by this manufacturer. Then complete the table below.

Carry your intermediate computations to at least three decimal places. Round your answers to one decimal place. 

(If necessary, consult a list of formulas.)

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