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Keith_Richards [23]
4 years ago
13

Five runners ran a marathon before they used a new training program. The same five runners also ran a marathon after they went t

hrough the new training program. The following data represents the completion time of a marathon in minutes for each of the 5 runners before and after training with the new training program. The trainer wants to determine if the training program results in faster completion time of the marathon. (You can use Excel for solving this problem).
Runner Before After
1 110 94
2 88 81
3 84 82
4 94 88
5 108 97
1. What is the observed value of the test statistic?
A) 3.53
B) 1.179
C) 1.924
D) 2.732
E) 0.417
Mathematics
1 answer:
Soloha48 [4]4 years ago
7 0
I think it is B or C. Sorry if I’m wrong.
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On the day before an election in a large city, each person in a random sample of 1,000 likely voters is asked which candidate he
Nadya [2.5K]

Answer:

The answer is B

Step-by-step explanation:

Definition of margin of error is simply expected error from result of a survey. Which means the actual vote results are in the range of plus or minus %3.

On this survey the result is %55 percent in favor of Taylor and the margin of error is %3. That means in the real election Taylor will get votes in between %52-%58. In other word

0.55-0.03=0.52

The sample proportion minus the margin of error is greater than 0.50, which provides evidence that more than half of all likely voters plan to vote for candidate Taylor.

7 0
3 years ago
The three angles in a triangle are in the ratio 3:4:5. Find the angles
insens350 [35]
The angles are 45° 60° and 75°

Elaboration:
Let the three angles be 3x 4x and 5x
( since the sum of interior angles of triangle=180° )
3x+4x+5x= 180
12x = 180
x = 15
3x= 45
4x= 60
5x= 75


3 0
2 years ago
Can anyone tell me how to solve this 2x+7>-15
denis23 [38]
Answer:
x >-11

Explanation:
2x+7>-15

Subtract 7 from both sides
2x >-15-7

Simplify-15-7 to -22
2x >-22

Divide both sides by 2
22
x > - ___
2

Simplify 22/2 to 11
x >-11
5 0
3 years ago
Two brothers are painting pictures. One of the
alina1380 [7]

━━━━━━━━━━━━━━━ ♡ ━━━━━━━━━━━━━━━  

Assuming you are asking what does x represent when you say "What does represent" the answer is a: the number of days it take the brothers to paint 13 pictures.

The first 2 sentences are useless and don't tell you anything (well they do but you don't need the information).

Both brothers can paint 13 pictures in x days.

So x means days, more specifically, the number of days it took for the brothers to paint 13 pictures.

━━━━━━━━━━━━━━━ ♡ ━━━━━━━━━━━━━━━  

5 0
4 years ago
At the beginning of the week the balance in your bank account was $298.72. During the week you made a deposit of $425.69. You al
Nastasia [14]
425.69+298.72=724.41

29.72+135.47+208.28=373.47

724.41-373.47=350.94

350.94-5=345.94

The answer is c
7 0
4 years ago
Read 2 more answers
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