Acompany had 80 employees whose salaries are summarized in the frequency distribution below. find the
mean salary.
salary ($) employees
5,001-10,000 16
10,001-15,000 14
15,001-20,000 15
20,001-25,000 17
25,001-30,000 18

Step-by-step explanation:

Since we have a groued data for this case we can construct the following table to find the expected value.

 Interval               Frequency(fi)      Midpoint(xi)           xi*fi

5001-10000              16                       7500.5            120008

10001-15000             14                      12500.5           175007

15001-20000            15                      17500.5           262507.5

20001-25000           17                      22500.5          382508.5

25001-30000           18                      27500.5          495009

Total                          80                                              1435040

And we can calculate the mean with the following formula:

Where

And if we replace we got:

the answer is 200

step-by-step explanation:

the way the question is worded, it seems to imply the $264 interest is simple interest, not compound interest.

the simple interest for 2 years is $264; the simple interest for 1 year is $132.

$132 interest on a $600 investment means an interest rate of (132/600)*100 = 22%.

the value of $200 at 22% interest compounded annually for three years is

200%281.22%29%5e3

the amount of interest is that value, minus the original $200.

the anwser is d) 75°

step-by-step explanation: