g If annual incomes for a population are normally distributed with a mean income of $67,000 and a standard deviation of $4,200, a) What is the probability that a randomly selected student earns more than $67,000? b) What’s the probability that a randomly selected student earns between $65,000 and $70,000? c) What’s the probability that the sample average earnings of 20 people is less than $60,000?

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

step-by-step explanation: