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Zolol [24]
3 years ago
5

You give a test to 100 students and determine the standard deviation of the scores. After grading the test, you realize that the

10 students with the highest scores did exceptionally well. You decide to award these 10 students a bonus of 5 more points each. The standard deviation of the new score distribution will be _______________________(less than, greater than or the same as) that of the original score distribution
Mathematics
1 answer:
Rasek [7]3 years ago
5 0

Answer:

greater than

Step-by-step explanation:

The standard deviation of a distribution σ = \sqrt{sum(x - mean)^2/ n}

where x is the score of each student

Adding 5 to 10 student scores would be = x+5 - mean

increasing the scores of the 10 students by 5, which in turn increases the standard deviation of the distribution.

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A certain drug is made from only two ingredients: compound A and compound B. There are
NISA [10]

Answer:

425 milliliters of compound A are needed

Step-by-step explanation:

We were told that 5 milliliters of compound A and 6 milliliters of compound B is needed to make the drug.

This means that each drug contains 11 milliliters of both compounds.

\frac{935}{11}=85 milliliters is the volume of each drug.


Therefore the chemist needed 5\times 85=425 millilirteres of compound A.

3 0
4 years ago
Make a conjecture about 5 to the power of 2 minus 6 to the power of 2= 5 +4 =9
Inessa [10]
5^2 - 6^2
is the difference of 2 squares
and = (5-6)(5+6)  = -11
3 0
3 years ago
A cone shaped cup has a radius of 4 inches and a height of 6 inches. Which measurement is the closest to the volume in cubic inc
mihalych1998 [28]
7488in3 in direct form of the eqation is the biggest answer but put 554in3 if in the parlogical form
4 0
4 years ago
Can someone help me with this Im not sure if My answer is correct
sergeinik [125]

Answer:

y = 2x - 3

Yes, your answer is correct.

Step-by-step explanation:

First, find the slope of the two points by using the slope formula:

        y2 - y1

m = -------------

        x2 - x1

         13 - 5

m = -------------

          8 - 4

         8

m = ------- = 2

         4

To find the y-intercept, plug in values into the slope-intercept formula:

y = mx + b

Where m = slope and b= y-intercept. Use any one of the points. I'll be using (4,5):

5 = (2) (4) + b

5 = 8 + b

-3 = b

b = -3

So, putting everything into the slope intercept formula:

y = 2x - 3

4 0
3 years ago
The number of employees for a certain company has been decreasing each year by 2%. If the company currently has 690 employees an
solmaris [256]

Answer:

511 employees

Step-by-step explanation:

Given data

P=690

rate= 2%

time = 13 years

let us apply the simple interest formula

A=P(1-rt)

Note the  negative sign (since we are dealing with decrease)

A= 690(1-0.02*13)

A=690(1-0.26)

A=690*0.74

A=510.6

A= 511 approx

Hence the population will reduce to 511 employees

8 0
3 years ago
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