Consider the following data drawn independently from normally distributed populations: (You may find it useful to reference the appropriate table: z table or ttable) X1 = -28.3 $1 = 8.7 n₁ = 22 X2 = -18.5 $₂² = 7.9 n2 = 16 a. Construct the 95% confidence interval for the difference between the population means. Assume the population variances are unknown but equal. (Round final answers to 2 decimal places.) Confidence interval is to

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.5: Comparing Sets Of Data
Problem 14PPS
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Consider the following data drawn independently from normally distributed populations: (You may find it useful to reference the
appropriate table: z table or t table)
X₁ = -28.3
2
$1
n1 = 22
= 8.7
X2 = -18.5
2
S2 = 7.9
n2 = 16
a. Construct the 95% confidence interval for the difference between the population means. Assume the population variances are
unknown but equal. (Round final answers to 2 decimal places.)
Confidence interval is
to
Transcribed Image Text:Consider the following data drawn independently from normally distributed populations: (You may find it useful to reference the appropriate table: z table or t table) X₁ = -28.3 2 $1 n1 = 22 = 8.7 X2 = -18.5 2 S2 = 7.9 n2 = 16 a. Construct the 95% confidence interval for the difference between the population means. Assume the population variances are unknown but equal. (Round final answers to 2 decimal places.) Confidence interval is to
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