The table shows the age, in years, of employees in a company. Age (a) in years Frequency 18 < a < 20 3 20 < a < 22 2 22 < a < 24 7 24 < a < 26 8 26 0 a) Find the modal class interval. Isac b) Work out an estimate of the mean age of these employees.

step-by-step explanation:

i do not know this sorry : (

5

step-by-step explanation:

answer: 33 ( approx)

step-by-step explanation:

since, in the linear regression formula, the slope is the a in the equation y = b + ax ( by comparing it with the general equation of line y = mx + c )

where,

here given table is,

price ($), x   :           18         23       25       29       30       33

pairs sold, y :         16         13         10       8         6       2

so, ,   ,   ,

and   ,

thus, slop of the given line is,

⇒  

⇒   ≈ 33