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WARRIOR [948]
2 years ago
7

1/ Assume that the distribution of residuals is approximately normal with mean 0 cm and standard deviation 5.9cm. What percent o

f the residuals are greater than 8cm? Justify your answer.
2/ Base on your answer on part 1, would it be surprising to randomly select a high school senior from the high school with a foot length of 20cm and a height greater than 165cm? Justify your answer.
Mathematics
1 answer:
Xelga [282]2 years ago
6 0

Answer:

1. 8.576%

2. Yes

Step-by-step explanation:

1. Use the calculator

Enter: normalcdf(8, E99, 0, 5.9)

This is equal to .08756.

Convert this number into a percent = 8.756%

2.

First, calculate the residual

Residual = Observed - Predicted = 165 - 2.599(20) + 105.08 = 7.94

Use the calculator

Enter: normalcdf(7.94, E99, 0, 5.9)

This is equal to .0892.

Convert this number into a percent = 8.92%

This would be surprising, because the chance of this happening is very low.

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In circle S,diameter PN is drawn .If measurement arc MN=110 degrees and PS=10 then find the length of MN to the nearest tenth.Sh
Goryan [66]

Answer:

MN=16.4\ units

Step-by-step explanation:

step 1

Find PN

we know that

PN is a diameter

PS is a radius

PS=10\ units

so

PN=2*PS=2*10=20\ units

step 2

Find the measure of arc MP

arc\ MN+arc\ MP=180\°

arc\ MN=110\°

arc\ MP=180\°-110\°=70\°

step 3

Find the measure of angle MNP

we know that

The inscribed angle measures half that of the arc comprising

substitute the value

step 4

Find the measure of angle MPN

we know that

The inscribed angle measures half that of the arc comprising

substitute the value

step 5

Find the measure of angle NMP

The sum of the internal angles of a triangle must be equal to 180 degrees

therefore

The triangle MNP is a right triangle

step 6

Find the length MN

In the right triangle MNP

sin(

substitute the values

sin(55\°)=\frac{MN}{20}

MN=(20)sin(55\°)=16.4\ units

7 0
2 years ago
Why would someone choose to use a graphing calculator to solve a system of linear equations instead of graphing by hand? Explain
anygoal [31]
In addition, from the response shown, using a graphical calculator brings the following benefits:
 1) You can write the system of linear equations as big as you want. This is: systems 3 * 3, 4 * 4, 5 * 5.
 2) The response to systems of equations greater than 2 * 2 can be complicated when you graph the solution, therefore, the graphing calculator can be much more efficient in these cases.
 3) You can write the linear equations in any way. Resolving by hand you should probably rewrite the system of equations to find the solution.
5 0
2 years ago
Read 2 more answers
Door panels are stored in the yard on pallets holding 20 panels. The yard currently has 5 complete pallets and 20 additional pal
Sladkaya [172]

At the end of tomorrow, inventory of 5+20 pallets will have been used to fill orders for 2+10 pallets. That leaves inventory on hand of

... 25 - 12 = 13 pallets

Since each holds 20 panels, that amounts to

... (13 pallets) × (20 panels/pallet) = 260 panels . . . . remaining

5 0
2 years ago
the weight of a bag of golf balls varies directly as the number of golf balls in the bag.If a bag of 69 gold balls weighs 2,553
seropon [69]

Answer: 30

Step-by-step explanation:

Given :The weight of a bag of golf balls varies directly as the number of golf balls in the bag.

Let x be the number of golf balls in a bag that weighs 1,110 grams.

Then we have the following direct variation equation,

\dfrac{x}{1110}=\dfrac{69}{2553}

Multiply 1110 both sides , we get

x=\dfrac{69}{2553}\times1110=30

Hence, there are 30 balls in the bag.

4 0
2 years ago
2. Tess picked 12 flowers on Monday morning In the afternoon she picked some more flowers. If Tess picked 27 flowers in all, how
sammy [17]
27 in total
12 in the morning
27-12 = 15
She picked 15 in the afternoon
5 0
2 years ago
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