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Karolina [17]
2 years ago
13

Each person who applies for an assembly job at Robert's Electronics is given a mechanical aptitude test. One part of the test in

volves assembling a plug-in unit based on numbered instructions. A sample of the length of time it took 42 persons to assemble the unit was organized into the following frequency distribution. Length of Time (in minutes) Number 1 up to 4 4 4 up to 7 8 7 up to 10 14 10 up to 13 9 13 up to 16 5 16 up to 19 2 What is the mean (in minutes)
Mathematics
1 answer:
coldgirl [10]2 years ago
5 0

The mean in minutes of the length of time given= 9.1

<h3>Calculation of mean when frequency table is given</h3>

The formula used for the determination of mean when a frequency table is given is

= total/n

Where total = frequency×midpoint

n = 42

To calculate the total, the mid point of each length of time is determined as follows;

1+4/2 = 2.5 × 4 = 10

4+7/2= 5.5 × 8 = 44

7+10/2 = 8.5 × 14= 119

10+13/2 = 11.5× 9 = 103.5

13+16/2= 14.5×5 = 72.5

16+19/2= 17.5× 2= 35

Total= 10+44+119+103.5+72.5+35 = 384

Therefore mean = 384/42= 9.1

Learn more about mean here:

brainly.com/question/20118982

#SPJ1

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3 years ago
The two-way table shows the number of students in a school who have hamsters and/or dogs as pets.
algol13

Answer:

1

Step-by-step explanation:

There are a total of 16+25 = 41 students that own hamsters.

There are a total of 16+24 = 40 students that own dogs.

This is a difference of 41-40 = 1.

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HOW DO I MULTIPLY 437 BY 122? STEPS PLEASE. I GIVE BRAINLIEST AND 100pts
hram777 [196]

Step-by-step explanation:

437*122

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6 0
3 years ago
Read 2 more answers
What is the simplified form of this?
katrin [286]
(2x^2-4x-3)(3x+1)
Expand
<span><span>(<span><span><span>2<span>x^2</span></span>+<span>−<span>4x</span></span></span>+<span>−3</span></span>)</span><span>(<span><span>3x</span>+1</span><span>)
Cross multiply
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Simplify</span></span><span><span><span><span><span>6<span>x^3</span></span>−<span>10<span>x^2</span></span></span>−<span>13x</span></span>−3 is your answer</span></span>

7 0
3 years ago
The area of a rectangle is 37.5 square inches. The length of the rectangle is 15 inches. What is the width of the rectangle?
Svetlanka [38]
Here is how to find the answer for this problem.
We know that the formula for getting the area of the rectangle is A = Length x Width. Given that the area is 37.5 inches squared and the length is 15 inches, let us just plug in the values. Let w be width.
35.7 in^2 = 15 in x w
Next, we divide both sides by 15 and this is the result
w = 2.5 inches.
Therefore, the answer would be 2.5 inches.
Hope this answer helps. Thanks for posting your question.
7 0
3 years ago
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