The standard error of the mean is 128.125.
The formula for standard error is:

With our information, we have:
Answer:

Step-by-step explanation:
Considering the expression

As

<em>Improper fraction is a fraction which has numerator greater than denominator, such as 5/3.</em>
So,

As
is converted into improper fraction
.
And
can not be further reduced.
Therefore,

Keywords: fraction, reduced form, improper fraction
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The probability is 90/500 =18%
700*18%= 700 *18/100 = 126
126 customers will be selected to participate in the survey on Saturday
Answer:
280 cm
or 280cm^2
Step-by-step explanation: