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Anestetic [448]
3 years ago
9

A manufacturing process outputs parts having a normal distribution with a mean of 30 cm and standard deviation of 2 cm. From a p

roduction sample of 80 parts, what proportion of the sample can be expected to fall between 28 and 32 cm
Mathematics
1 answer:
Arisa [49]3 years ago
7 0

Answer:

68% of the sample can be expected to fall between 28 and 32 cm

Step-by-step explanation:

The Empirical Rule states that, for a normally distributed random variable:

68% of the measures are within 1 standard deviation of the mean.

95% of the measures are within 2 standard deviation of the mean.

99.7% of the measures are within 3 standard deviations of the mean.

In this problem, we have that:

Mean = 30

Standard deviation = 2

What proportion of the sample can be expected to fall between 28 and 32 cm

28 = 30-2

28 is one standard deviation below the mean

32 = 30 + 2

32 is one standard deviation above the mean

By the Empirical Rule, 68% of the sample can be expected to fall between 28 and 32 cm

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Answer

C. Yes, by SSS only

Step-by-step explanation:

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3 years ago
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Dan and Alan take turns mowing the grass of a yard that is 2400 square yards in area. Dan takes an hour to mow the whole lawn us
lidiya [134]

Answer:

Step-by-step explanation:

6 0
3 years ago
Someone help it’s urgent! I’ll brainlist you.
julia-pushkina [17]

Answer:

Constant: -17

Coefficient: 7

Number of terms: 3

Step-by-step explanation:

Constant: -17

-> This is the number that doesn't change. No matter what m or p is, -17 will be -17

Coefficient: 7

-> The coefficient is the number next to the variable. In this case, the number "with" (being multiplied by) p is 7

Number of terms: 3

-> There are three terms. A term includes positive/negative, number, variables, etc.

-> The terms are:

[] 9m^{4}

[] 7p

[] -17

Have a nice day!

     I hope this is what you are looking for, but if not - comment! I will edit and update my answer accordingly.

- Heather

7 0
2 years ago
The width of a human hair is 2 x 10-5 meters. The width of a piece of sand is 1.5 x 10¹ meters.
Elena L [17]

The difference in the widths, in meters, of the human hair and the piece of sand is 1.4998*10^{-1} m.

It is given in the question that:-

Width of a human hair = 2*10^{-5} m

Width of a piece of sand = 1.5*10^{-1}m

We have to find the difference in the widths, in meters, of the human hair and the piece of sand.

We know that,

Difference between the widths = Width of a piece of sand - Width of a human hair

Hence, we can write,

Difference between the widths =  2*10^{-5} m - 1.5*10^{-1}m

We can write,

1.5*10^{-1}=15000*10^{-5}

Hence,

Difference between the widths =

15000*10^{-5} - 2*10^{-5}= 14998*10^{-5} = 1.4998*10^{-1} m

To learn more about Width, here:-

brainly.com/question/17156323

#SPJ1

8 0
2 years ago
Select the correct answer.
Rudiy27

Answer:

<h3>\boxed{ \boxed{ \bold{ \purple{6}}}}</h3>

Option A is the correct option.

Step-by-step explanation:

Let the number be 'x'

Let's create an expression:

\sf{6( {x}^{2}  + 15)}

The number or alphabet by which variable is multiplied is called the coefficient of the term.

In our case, The value of coefficient is 6

Hope I helped !

Best regards!!

6 0
3 years ago
Read 2 more answers
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