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Ad libitum [116K]
2 years ago
10

If the teacher has 50 sheets of paper and 10 students, how many can each student get equally?

Mathematics
2 answers:
Vilka [71]2 years ago
6 0
The answer is 5 sheets of paper. 50 divided by 10 equals 5. Please mark me brainest
cestrela7 [59]2 years ago
3 0

Answer:

5

Step-by-step explanation:

50 ÷ 10 = 5

If the teacher gives out 5 sheets of paper to each of the 10 students, she won't have any paper leftover, and each student will have 5 sheets.

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Are the marks one receives in a course related to the amount of time spent studying the subject? To analyze this mysterious poss
sertanlavr [38]

Answer:

a) 98.522

b) 0.881

c) The correlation coefficient and co-variance shows that there is positive association between marks and study time. The correlation coefficient suggest that there is strong positive association between marks and study time.

Step-by-step explanation:

a.

As the mentioned in the given instruction the co-variance is first computed in excel by using only add/Sum, subtract, multiply, divide functions.

Marks y Time spent x y-ybar x-xbar (y-ybar)(x-xbar)

77                    40 5.1         1.3 6.63

63                     42 -8.9            3.3 -29.37

79                     37 7.1            -1.7 -12.07

86                     47 14.1            8.3 117.03

51                    25 -20.9  -13.7 286.33

78                     44 6.1            5.3 32.33

83                      41 11.1            2.3 25.53

90                     48 18.1            9.3 168.33

65                     35 -6.9           -3.7 25.53

47                    28 -24.9 -10.7 266.43

Covariance=\frac{sum[(y-ybar)(x-xbar)]}{n-1}

Co-variance=886.7/(10-1)

Co-variance=886.7/9

Co-variance=98.5222

The co-variance computed using excel function COVARIANCE.S(B1:B11,A1:A11) where B1:B11 contains Time x column and A1:A11 contains Marks y column. The resulted co-variance is 98.52222.

b)

The correlation coefficient is computed as

Correlation coefficient=r=\frac{sum[(y-ybar)(x-xbar)]}{\sqrt{sum[(x-xbar)]^2sum[(y-ybar)]^2} }

(y-ybar)^2 (x-xbar)^2

26.01        1.69

79.21       10.89

50.41             2.89

198.81       68.89

436.81       187.69

37.21       28.09

123.21        5.29

327.61        86.49

47.61         13.69

620.01         114.49

sum(y-ybar)^2=1946.9

sum(x-xbar)^2=520.1

Correlation coefficient=r=\frac{886.7}{\sqrt{520.1(1946.9)} }

Correlation coefficient=r=\frac{886.7}{\sqrt{1012582.69} }

Correlation coefficient=r=\frac{886.7}{1006.2717 }

Correlation coefficient=r=0.881

The correlation coefficient computed using excel function CORREL(A1:A11,B1:B11) where B1:B11 contains Time x column and A1:A11 contains Marks y column. The resulted correlation coefficient is 0.881.

c)

The correlation coefficient and co-variance shows that there is positive association between marks and study time. The correlation coefficient suggest that there is strong positive association between marks and study time. It means that as the study time increases the marks of student also increases and if the study time decreases the marks of student also decreases.

The excel file is attached on which all the related work is done.

Download xlsx
7 0
3 years ago
When the radius of a sphere is doubled, what is the resulting change in volume? A) The original volume is doubled. B) The origin
kobusy [5.1K]

Answer:

C

Step-by-step explanation:

The volume (V) of a sphere is calculated using the formula

V = \frac{4}{3}πr³

If the radius is doubled, that is r = 2r , then

V = \frac{4}{3}π (2r )³

(2r)³ = 8r³, thus the volume is multiplied by 8

5 0
3 years ago
given that (0,-7) is on the graph of f(x), find the corresponding point of point for the function f(x+2)
Bas_tet [7]
The graph of f(x+2) is the graph of f(x) moved 2 units to the left. The corresponding point is ...
  (-2, -7)
3 0
3 years ago
Read 2 more answers
999,765 rounded to the nearest hundred thousand
BigorU [14]
The answer will be: 1,000,000 if you round to the nearest hundred thousands. Hope it helps! :D
4 0
3 years ago
Read 2 more answers
Which one is it A. B. C. or D.
san4es73 [151]
The answer will be c
Hope it's help you
6 0
3 years ago
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