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In 2005, the average score on the Mathematics portion of the ACT for males was 21.3 with standard deviation 5.3. The average score on the Mathematics portion of the ACT for females was 20.2 with standard deviation 4.8.
-If random samples are taken with 50 males and 70 females, find the mean and standard error of the distribution of differences in sample means, , where and represents the sample means for males and females, respectively. Report the standard error with four decimal places.

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In 2005, the average score on the Mathematics portion of the ACT for males was 21.3 with standard deviation 5.3. The average score on the Mathematics portion of the ACT for females was 20.2 with standard deviation 4.8.
-If random samples are taken with 50 males and 70 females, find the mean and standard error of the distribution of differences in sample means,  , where  and  represents the sample means for males and females, respectively. Report the standard error with four decimal places.

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The Answer of Use the following 
In 2005, the average score on the Mathematics portion of the ACT for males was 21.3 with standard deviation 5.3. The average score on the Mathematics portion of the ACT for females was 20.2 with standard deviation 4.8.
-If random samples are taken with 50 males and 70 females, find the mean and standard error of the distribution of differences in sample means,  , where  and  represents the sample means for males and females, respectively. Report the standard error with four decimal places.

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