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In: Statistics and Probability

A 90 % confidence interval (a t interval) for the mean lives (in minutes) of Kodak...

A 90 % confidence interval (a t interval) for the mean lives (in minutes) of Kodak AA batteries is ( 400, 440 ). Assume that this result is based on a sample of size 25 .

1) What is the value of the sample mean?
Incorrect 440
Correct: 420
Incorrect 415
Incorrect 425
Incorrect 410

You are correct.
Your receipt no. is 159-3963		 Previous Tries

2) What is the value of the sample standard deviation?
58.4494
75.8820
75.9679
58.5432

Tries 0/2

3) Construct the 99% confidence interval.
(387.3041,452.6959)
(390.8670,449.1330)
(403.0712,436.9288)
(404.6121,435.3879)

Tries 0/2

4) If the confidence interval (402.6156 ,437.3844) is obtained from the same sample data, what is the degree of confidence?
95%
90%
88%
85%

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Expert Solution

orchestra answered 1 year ago
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