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2 years ago

An event manager recorded the number of people in different age groups that attended a music concert.

Mathematics

2 answers:

ehidna [41]2 years ago

7 0

The third data table accurately represents data in the histogram.
If you draw the histogram, it looks like in the .jpeg image enclosed with this answer.

Natasha2012 [34]2 years ago

4 0

Answer:

The correct answer would be C. the third table.

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Please I’ll mark brainliest if you get it right

SpyIntel [72]

C: 24
both of the missing sides are equal to 4

3 0

3 years ago

A tortoise is walking in the desert. It walks for 2 minutes at a speed of 5.12 meters per minute. For how many meters does it wa

Gnesinka [82]

What you have to do is multiply 5.12*2
10.24 meters

5 0

3 years ago

Help me find the volume of this shape. step-by-step explanation please!!

Murrr4er [49]

Answer: 64 m^3

Step-by-step explanation:

Formula for the volume of a cube is b*h*w

Substitute values: 4*4*4 (or 4^3)

Calculate: 64

3 0

2 years ago

The manager of a fleet of automobiles is testing two brands of radial tires and assigns one tire of each brand at random to the

Darya [45]

Answer:

Brand 1 Brand 2 Difference

37734 35202 2532

45299 41635 3664

36240 35500 740

32100 31950 150

37210 38015 −805

48360 47800 560

38200 37810 390

33500 33215 285

Sum of difference = 2532+ 3664+740+150 −805+ 560 +390 +285 = 7516

Mean = $d=\frac{7516}{8}$

Mean = $d=939.5$

a) d= 939.5

$\text{Sample Standard deviation, s} = \sqrt{\dfrac{(x-\bar{x})^2}{n-1}}$

$=\sqrt{\dfrac{(2532-939.5)^2+(3664-939.5)^2+(740-939.5)^2 ...+(285-939.5)^2}{8-1}}$

=1441.21

b)SD= 1441.21

c)Calculate a 99% two-sided confidence interval on the difference in mean life.

confidence level =99%

significance level =α= 0.01

Degree of freedom = n-1 = 8-1 =7

So, $t_{\frac{\alpha}{2}}=3.499$

Formula for confidence interval $= \left( \bar{X} \pm t_{\frac{\alpha}{2}} \times \frac{s}{\sqrt{n}} \right)$

Substitute the values

confidence interval $= 939.5 \pm 3.499 \times \frac{1441.21}{\sqrt{8}} \right)$

confidence interval $= 939.5 - 3.499 \times \frac{1441.21}{\sqrt{8}} \right)$ to $= 939.5 + 3.499 \times \frac{1441.21}{\sqrt{8}} \right)$

Confidence interval $−843.396\$ to $2722.396$

8 0

2 years ago

The mass of the blue copper sulfate crystal is two-thirds the mass of the red fluorite crystal. Write an equation you can use to

Reptile [31]

Answer: multiplication i think

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers