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3 years ago

The following are the times, in seconds, that 15 people spent taking an online survey.

Mathematics

1 answer:

elena-s [515]3 years ago

4 0

The only true statement in the distribution is 261.

Given the following values :

125, 91, 261, 25, 155, 105, 195, 132, 110, 143, 121, 99, 167, 165, 160

Arranging the values in ascending order :

25, 91, 99, 105, 110, 121, 125, 132, 143, 155, 160, 165, 167, 195, 261

An outlier can be calculated thus :

Lower boundary = Q1 - (1.5 × IQR)

Upper boundary = Q3 + (1.5 × IQR)

Using a statistical calculator :

Lower quartile, Q1 = 105

Upper quartile, Q3 = 165

IQR = Q3 - Q1 = 165 - 105 = 60

Lower boundary = 105 - (1.5 × 60) = 15

Upper boundary = 165 + (1.5 × 60) = 255

Therefore, values lower than 15 or greater than 255 are outliers.

Hence, the outlier in the distribution is 261.

Learn more : brainly.com/question/24582786

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Brainest for best answer only 5 mins left show your work

Kamila [148]

Answer:

Step-by-step explanation:

Problem One

Perimeter is in meters not square meters. The equation is

2*(6.8+x) + 2*12.5= 47 Remove the brackets. Combine like terms

13.6 + 2x + 25 = 47

38.6 + 2x = 47 Subtract 38.5 from both sides

2x = 47 - 38.6

2x = 8.4 Divide by 2

x = 4.2

Answer D

Problem 2

This problem is asking that you calculate the perimeter of a swimming pool.

The two semicircles on the ends make a whole circle.

The diameter of the semicircles is obtained from the difference of the two given lengths.

The rectangle has a length of 12. The length of the rectangle and the 2 semicircles is 16. The difference is 4. You could divide this by 2 to get the radius. I would just leave it as the diameter.

So the perimeter is pi*d + 2 * 12 [there are 2 lengths]

Perimeter = 4*pi + 24

Perimeter = 12.56 + 24

Perimeter = 36.56

Answer A

Problem 3

This is the circle inside the square.

The radius of the circle = 9

The diameter of the circle and the length of square's side = 2*9 = 18

The area of the square = s^2 where s = 18

The area of the square = 18^2 = 324

The area of the circle = pi * 9^2 = 3.24 * 81 = 251.34

The area of the Shaded area = 324 - 251.34 = 69.66

Answer C

Problem 4

b1 = 5

b2 = 11.5

h = 4.5

Formula

Area = (b1 + b2 ) * 4.5/2

Area = (5 + 11.5) * 4.5 /2

Area = 16.5 * 4.5 / 2

Area = 74.25/2

Area = 37.125

Answer D

5 0

3 years ago

An electrician charges $40 to come to your house.She also charges $55for each that she works. The electrician charges you total

shusha [124]

Answer:

Step-by-step explanation:

First, write an equation. 55x+40=190.

X represents the hours the electrician works. The 55 represents the $55 that she charges for each hour she works. The +40 for the $40 that was the price just to come to your house. The 190 is the total cost. Now, solve that equation.

55x+40=190

55x=150

x=2.72727272...

So the answer is 2.727 hours. It can be rounded as needed or turned into a decimal, 2 8/11.

5 0

3 years ago

Can someone help me with this ASAP please I’m being timed !

viva [34]

Answer:

%65

Step-by-step explanation:

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2 years ago

What is the zero of function f?<br> f(x)=7^3Vx+12-12

MrRissso [65]

Answer:

hope it helps ya.

please give me brainliest

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3 years ago

For the sequence 3, 8, 13, 18, 23, ….: (i) Find recursive and non-recursive formulas. (ii) Prove the non-recursive formula using

Aleksandr-060686 [28]

Answer:

Step-by-step explanation:

Given is the sequence 3, 8, 13, 18, 23, ….:

We find that this is a geometric sequence with each term added with 5 to the previous term

Hence recursive formula is $a_n =a_{n-1} +5$

Non recursive formula:

$a_n =a_{n-1} +5=a_{n-2} +2(5)\\=a_{n-3} +3(5)-...\\=a_{n-(n-1)} +5(n-1)\\=a_1+(n-1)5\\=3+5n-5\\=5n-2$

iii) Start with 3.

Add 5 and write as 2nd term

Take the resulting term and add 5 and mark as 3rd term

Repeat this m times.

7 0

3 years ago