Mathematics, 16.07.2020 01:01 jumeljean123oythxy

HELP ASPAP WILL MARK BRAINIEST standard deviation

Answers: 1

Show answers

Answers

Answer from: benjaminmccutch

The standard deviation of the given data is 11.34.

Step-by-step explanation:

We have to find the standard deviation for the given data;

Grade on No. of students

test (X) with that score (f) $X \times f$ $( X - \bar X)^{2}$ $f \times ( X - \bar X)^{2}$

50 1 50 1073.218 1073.2176

57 2 114 663.578 1327.1552

60 4 240 518.018 2072.0704

65 3 195 315.418 946.2528

72 3 216 115.778 347.3328

75 12 900 60.218 722.6112

77 10 770 33.178 331.776

81 6 486 3.098 18.5856

83 6 498 0.058 0.3456

88 9 792 27.458 247.1184

90 12 1080 52.418 629.0112

92 12 1104 85.378 1024.5312

95 2 190 149.818 299.6352

99 4 396 263.738 1054.9504

100 5 500 297.218 1486.088

Total 91 7531 11580.68

Firstly, the mean of the above data is given by;

Mean, $\bar X$ = $\frac{\sum X \times f}{\sum f}$

= $\frac{7531}{91}$ = 82.76

Now, the standard deviation of the data is given by;

Standard deviation, S.D. = $\sqrt{\frac{\sum f(X-\bar X)^{2} }{\sum f-1}}$

= $\sqrt{\frac{11580.68}{91-1}}$

= 11.34

Hence, the standard deviation of the given data is 11.34.

Answer from: Quest

he will have 300 because he is really broke and 300 is in his imangine

step-by-step explanation: he ehe heh step by the thy

Answer from: Quest

answer: expression= p+p*d%

price reduction + sale price = $625

sale price: $p+$p*d%

where d% is the percentage of discount

step-by-step explanation:

original price = p

price went down by $150 price reduction $p*d%

sale price= $ 475

therefore the price before sale is: $625

and the expression that shows the price before sale is: p+p*d%

Another question on Mathematics

Mathematics, 21.06.2019 18:00

Jack has a piece of red ribbon that is two times as long as his piece of blue ribbon. he says that he can use two different equation to find out how long his piece of red ribbon is compared to his piece of blue ribbon is. is he correct? explain his reasoning

Answers: 1

Answer

Mathematics, 21.06.2019 18:30

Which of the following is the true for f(x) = 5cos

Answers: 2

Answer

Mathematics, 21.06.2019 20:30

Barney & noblet customers can choose to purchase a membership for $25 per year members receive 10% off all store purchases 1. how much would a member pay per year if he bought $50 worth of items each year? 2. write a slope-intercept equation that expresses how much a member pays per year using x to represent his purchases per year 3. how much would a member have to spend per year to pay off his membership fee?

Answers: 1

Answer

Mathematics, 21.06.2019 22:00

Consider the triangle. which shows the order of the angles from smallest to largest? angle a, angle b, angle c angle b, angle a, angle c angle b, angle c, angle a angle c, angle a, angle b

Answers: 3

Answer

You know the right answer?

HELP ASPAP WILL MARK BRAINIEST standard deviation
...

Questions

Mathematics, 05.09.2020 14:01

URGENT HELP ASAP The volume of a rectangular prism is expressed as 36x3+60x2 + x - 20. Its length is (3x + 4) and its width is (6x + 5). What i...

Mathematics, 05.09.2020 14:01

daca x supra y = 0,6 calculati; a) ce procent reprezinta 4y-3x din 5y-4x b) ce procent reprezinta 5y-4x din 4y-3x . REPEDEEE PLS...

Mathematics, 05.09.2020 14:01

You choose option d for overdraft options. what would happen if you had $10 in your checking account and completed the following debit card transactio...