Question

The following results come from two independent samples taken from two populations. sample 1 n? = 43 $\bar{x}_1$ = 20 $s_1$ = 2.22 sample 2 n? = 41 $\bar{x}_2$ = 23 $s_2$ = 7.23 Assume the variances are UNEQUAL. Calculate the standard error. Round your final answer to two decimal places, including the zero before the decimal place needed. E.g., 0.12.

          The following results come from two independent samples taken from two populations.
sample 1
n? = 43
$\bar{x}_1$ = 20
$s_1$ = 2.22
sample 2
n? = 41
$\bar{x}_2$ = 23
$s_2$ = 7.23
Assume the variances are UNEQUAL. Calculate the standard error.
Round your final answer to two decimal places, including the zero before the decimal place
needed. E.g., 0.12.
        
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The following results come from two independent samples taken from two populations.
sample 1
n? = 43
x̅1 = 20
s1 = 2.22
sample 2
n? = 41
x̅2 = 23
s2 = 7.23
Assume the variances are UNEQUAL. Calculate the standard error.
Round your final answer to two decimal places, including the zero before the decimal place
needed. E.g., 0.12.

Added by Ruben M.

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Elementary Statistics a Step by Step Approach
Elementary Statistics a Step by Step Approach
Allan G. Bluman 9th Edition
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The following results come from two independent samples taken from two populations. Sample 1: n = 43 1 = 20 S1 = 2.22 Sample 2: n = 41 2 = 23 S2 = 7.23 Assume the variances are UNEQUAL. Calculate the standard error. Round your final answer to two decimal places, including the zero before the decimal place if needed. E.g. 0.12
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Transcript

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00:01 For this problem, noting that we are looking for the test statistic for a two -sample t -test for unequal variances, the formula that we use is the following.
00:24 T is equal to sample mean 1 minus sample mean 2 divided by the square root of variance 1 over n1 plus variance 2 over n2...
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