1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Marta_Voda [28]
3 years ago
5

Suppose your statistics instructor gave six examinations during the semester. You received the following grades (percent correct

): 79, 64, 84, 82, 92, and 77. Instead of averaging the six scores, the instructor indicated he would randomly select two grades and compute the final percent correct based on the two percents. How many different samples, without replacement, of two test grades are possible
Mathematics
1 answer:
zheka24 [161]3 years ago
7 0

Answer:

15 samples

Step-by-step explanation:

The total sample space consists of 6 items

{79,64,84,82,92,77}

So,

n=6

The instructor has to randomly select 2 test scores out of 6.

So, r=6

The arrangement of scores selection doesn't matter so combinations will be used.

C(n,r)=\frac{n!}{r!(n-r)!} \\C(6,2)=\frac{6!}{2!(6-2)!}\\=\frac{6!}{2!*4!}\\=\frac{6*5*4!}{2!*4!} \\=\frac{30}{2}\\=15\ ways

Therefore, there are 15 different samples are possible without replacement ..

You might be interested in
How will knowing the value for the best measure of center for the heights of the adult males help Nancy determine whether she ca
uranmaximum [27]

Answer:

If Nancy only used the mean, then outliers could make her calculations inaccurate. By using an appropriate measure of center, Nancy is more likely to select clothing sizes that will fit the population of the countries she is sending clothing to.

Step-by-step explanation

From the app

8 0
3 years ago
Using the data below, what is the equation for the line of best fit? Remember, put your answer in y = ax + b form and round any
ratelena [41]
If we fit the data as calories as a function of wt loss/week, we need to arrange the data first from lowest to highest wt loss/week lbs and calories. Then, the set of points can be plotted in a graph and a graphical method of line fitting can be used. Curve fitting programs (which are also in the calculator) can be used. The result is:
y = -266.5741x + 2246.5116

The value of R² is 0.7109. The fit is not very good since R² is quite far from 0.99.
5 0
3 years ago
A handkerchief measures 22 CM long and 20 cm wide. jenny wants to put lace around it. how many centimeters of lace will she buy
Likurg_2 [28]

Answer:

you should find the perimeter using rectrangle formula

Step-by-step explanation:

perimeter of rectrangle-2 (l+B)

length=22cm breadth=20cm

perimeter=2 (22+20)

=2 X 42

=84

3 0
3 years ago
Help please ASAP thx all of them
Radda [10]
Hi, these equations are pretty easy actually, first thing you should know when working with variables is that you always want to leave the variable alone, let's take the third excersise for example, 12x + 2 = 146. Here you just do the opposite on the other side of the equation depending if the number is positive or negative. Since x is being multiplied by 12 you first get rid of the 2, since its positive you subtract it to 146. Now the answer should be 12x = 144. Now since you're multiplying 12 to x you just divide 12 from 144, 144/12 = 12
x = 12
6 0
4 years ago
Help pls im failing math
Travka [436]

Answer:

9^{35}

Step-by-step explanation:

  1. Original expression: (9^{5})^{7}  
  2. Exponents: 5 and 7
  3. 5 × 7 = 35
  4. So, (9^{5})^{7} and 9^{35} are the same.

I hope this helps!

4 0
3 years ago
Read 2 more answers
Other questions:
  • How many feet are in 84 inches??
    13·1 answer
  • What is the equation of the line ? and how do i know ?
    13·2 answers
  • Please help me ASAP thank uu
    11·1 answer
  • Select the graph of the solution set that would represent the following expression. | x | > 5
    13·1 answer
  • Part 1: Identify key features and graph a parabola from standard form.
    14·1 answer
  • Need help finding BC.
    12·1 answer
  • Find the coordinatevof x and y of the point m wich divides the line segment m1m2 in the ratio w1:w2​
    11·1 answer
  • Find measure of angle PQS
    6·2 answers
  • Which expression is equivalent to 3/64612?<br> 846<br> 849<br> 449
    11·1 answer
  • John bought a computer scanner and supplies for $215.70, which will
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!