Can somebody help please ? Thanks I’m advance !
1 answer:
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Answer:
y = - x +
Step-by-step explanation:
The equation of a line in slope- intercept form is
y = mx + c ( m is the slope and c the y- intercept )
Calculate m using the slope formula
m = (y₂ - y₁ ) / (x₂ - x₁ )
with (x₁, y₁ ) = (2, - 3) and (x₂, y₂ ) = (- 1, 4)
m = =
= -
, thus
y = - x + c ← is the partial equation
To find c substitute either of the 2 points into the partial equation
Using (- 1, 4), then
4 = + c ⇒ c = 4 -
=
y = - x +
← equation of line
Answer:
Probability that the mean outstanding bill is over $200 is 0.0526.
Step-by-step explanation:
We are given that the average outstanding bill for delinquent customer accounts for a national department store chain is $187.50 with standard deviation $54.50.
Also, a random sample of 50 delinquent accounts is selected.
<em>Firstly, Let </em><em> = mean outstanding bill</em>
The z score probability distribution for is given by;
Z = ~ N(0,1)
where, = average outstanding bill = $187.50
= standard deviation = $54.50
n = sample of delinquent accounts = 50
Probability that the mean outstanding bill is over $200 is given by = P( > $200)
P( > 200) = P(
>
) = P(Z > 1.62) = 1 - P(Z
1.62)
= 1 - 0.94738 = 0.0526
Therefore, probability that the mean outstanding bill is over $200 is 0.0526.