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Molodets [167]
4 years ago
13

Starting salaries of 90 college graduates who have taken a statistics course have a mean of $43,993 and a standard deviation of

$9,144. Using 99% confidence level, find the following:
A. The margin of error E:________
B. The confidence interval for the mean: μ__________< μ<_____________

Mathematics
1 answer:
Rufina [12.5K]4 years ago
5 0

Answer: attached below

Step-by-step explanation:

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the line containing the altitude to the hypotenuse of a right triangle whose vertices are p(-1, 1), q(3, 5), and r(5, -5).
finlep [7]

The equation of the straight line is given by 5y-x=6

An equation can be used to describe a straight line drawn on the Cartesian Plane. These equations have a generic structure and can change based on the slope and where the line intersects the axes.

We will greatly simplify this issue by utilizing the fact that this triangle is specified as a right triangle. We would have had to establish the presence of a right angle if it had been presented as a general triangle.

The segment QR is the hypotenuse of the triangle.

Any side's altitude is located along a line that is perpendicular to that side. We are aware that the slopes of perpendicular lines are negative reciprocals, or:

Slope of line joining  Q(3, 5) and R(5, -5)

m=\frac{y_2-y_1}{x_2-x_1}

Hence slope is= -10/2= -5

Now we know that for two perpendicular line the slope of one line is the negative reciprocal of the other.

Slope of line perpendicular to QR=1/5

This line passes through P(-1,1)

Equation of the straight line that passes through (1,-1) and with a slope of 1/5 is given by:

(y-y_1)=m(x-x_1)\\

Substituting the values we get:

y-1=1/5(x+1)

or,5y-5=x+1

or,5y-x=6

Hence the equation of the required line is : 5y-x=6

To learn more about straight lines visit:

brainly.com/question/17757770

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8 0
2 years ago
Please take a look at the picture. Please write your answer with an explanation.
Flauer [41]

Answer:

73

Step-by-step explanation:

Do the stuff in parenthesis first then do the stuff out of parenthesis EX:

4 to second power is 16 plus three is 19 plus two is 21 then add three to get 24 and seven to the second power is 49 add that and you get 73

7 0
3 years ago
Read 2 more answers
The perimeter of the rectangle is 30 centimeters.What is the side of c
Dafna1 [17]

Answer:

Step-by-step explanation:

Emmm

8 0
4 years ago
Read 2 more answers
What is the probability of getting heads and a b, c, and d
sp2606 [1]
I mean probably of getting head is a half if that's what u mean but what is a,b,c,d
4 0
4 years ago
Solve for “a” <br><br> 11a + 5 = -6
Shalnov [3]

Answer:

a=-1

Step-by-step explanation:

-6-5=-11

-11/11=-1

4 0
3 years ago
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