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A variable of two populations has a mean of 32.3 and a standard deviation of 17.9...

A variable of two populations has a mean of 32.3 and a standard deviation of 17.9 for one of the populations and a mean of 32.3 and a standard deviation of 23.5 for the other population. For independent samples of size 6888 and 4511​, ​respectively, find the mean and standard deviation of x overbar 1 minus x overbar 2.

The mean of x̄1-x̄2 is ??? ​

The standard deviation of x̄1-x̄2=???

(Round to six decimal places as​ needed.)

math   Statistics-And-Probability   
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Answer #1

6ol ivem data wlation has m ean ,: 32.3 . standard dev jahơn--. 17-9 Saople othor or has mean นุ2-32-3 standard dao3.S Sample n2 -45Ir Two is nor mally dJmuh om -the 2 23o S 6888 45 Γο.oes31

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