Using techniques from an earlier section, we can find a confidence interval for u. Consider a random sample of n matched data pairs A, B. Let d = B - A be a random variable representing the difference between the values in a matched data pair. Compute the sample mean d of the differences and the sample standard deviation has a normal distribution or is mound-shaped, or if n 2 30, then a confidence interval for l, is as follows. If d a - E< Hg

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Using techniques from an earlier section, we can find a confidence interval for u. Consider a random sample of n matched data pairs A, B. Let d = B - A be a random
variable representing the difference between the values in a matched data pair. Compute the sample mean d of the differences and the sample standard deviation
has a normal distribution or is mound-shaped, or if n 2 30, then a confidence interval for l, is as follows.
If d
a - E< Hg <d +E
where E = t
Vn
C = confidence level (0 <c< 1)
t, = critical value for confidence level c and d.f. = n - 1
B: Percent increase
for company
A: Percent increase
for CEO
18
18
4
21
37
22
30
21
14
-4
19
15
30
(a) Using the data above, find a 95% confidence interval for the mean difference between percentage increase in company revenue and percentage increase in CEO
salary. (Round your answers to two decimal places.)
lower limit
upper limit
Transcribed Image Text:Using techniques from an earlier section, we can find a confidence interval for u. Consider a random sample of n matched data pairs A, B. Let d = B - A be a random variable representing the difference between the values in a matched data pair. Compute the sample mean d of the differences and the sample standard deviation has a normal distribution or is mound-shaped, or if n 2 30, then a confidence interval for l, is as follows. If d a - E< Hg <d +E where E = t Vn C = confidence level (0 <c< 1) t, = critical value for confidence level c and d.f. = n - 1 B: Percent increase for company A: Percent increase for CEO 18 18 4 21 37 22 30 21 14 -4 19 15 30 (a) Using the data above, find a 95% confidence interval for the mean difference between percentage increase in company revenue and percentage increase in CEO salary. (Round your answers to two decimal places.) lower limit upper limit
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