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Fed [463]
3 years ago
5

In each of the following statements, identify the boldfaced and underlined number as the value of a population parameter or a sa

mple statistic.
A power company in Pennsylvania reported that in January of a particular year that the mean number of kilowatts used by each customer was 1346.
A consumer magazine tested a random sample of 19 green teas for taste and health benefits.
The mean cost per cup of tea was reported to be 14 cents.
Mathematics
1 answer:
nydimaria [60]3 years ago
6 0

Answer:

Check Explanation

Step-by-step explanation:

Population parameter is defined as the description of characteristics for the entire population.

Sample statistic are summaries of or an estimation of the population parameter. They're description of characteristics obtained from a group of random sample elements of a population.

a) If the mean amount of kilowatts used per household was obtained by taking an average of the entire households in Pennsylvania in the January of that particular year, then the 1346 kilowatts is a population parameter.

But if the value was arrived at from sampling only a number of random households all over Pennsylvania, then it's a sample statistic.

b) Since the mean cost of a cup of tea describes a characteristic that was obtained from only 19 selected cups of green tea, it is a sample statistic.

The number 19 too, representing the number of cups of green tea in the sample is also a sample statistic.

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5 percent of 2700 is 135 so the answer is $2700

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melisa1 [442]

Answer:

First choice: m = -4

Step-by-step explanation:

The second equation is already solved for n, so lets's use the substitution method and substitute m - 2 for n in the first equation.

m - 2n = 8

m - 2(m - 2) = 8

m - 2m + 4 = 8

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Vlad1618 [11]

Answer:

9) 6.3 units

11) n=6√2 and m=12,

10) m=6√3, n=6

12) 330.6 ft

Step-by-step explanation:

1) The Pythagoras Theorem says that, the square of the hypotenuse is the sum of the squares of the two shorter legs.

Let the missing side, which is the hypotenuse be x.

Then

{x}^{2}  =  {2}^{2}  +  {6}^{2}

{x}^{2}  = 4 + 36

{x}^{2}  = 40

x =  \sqrt{40}

x = 6.3

The missing side is 6.3 units to the nearest tenth.

2) This is an isosceles right triangle.

This implies that, the two legs are equal.

n = 6 \sqrt{2}

The hypotenuse can be found using Pythagoras Theorem.

{m}^{2}  =  {(6 \sqrt{2} )}^{2}  +  {(6 \sqrt{2} )}^{2}

{m}^{2}  = 36(4)

m =  \sqrt{36 \times 4}  = 6 \times 2 = 12

3) The side lengths of 30°-60°-90° are in the ratio, 2x,x√3,x

From the diagram, the hypotenuse is 12, therefore the other two legs are

n =  \frac{1}{2} (12) = 6

and

m = 6 \sqrt{3}

4) The height of the monument is 115 feet, the hypotenuse is 350.

By Pythagoras Theorem,

{x}^{2}  +  {115}^{2}  =  {350}^{2}

{x}^{2}  =  {350}^{2}   -  {115}^{2}

{x}^{2}  = 109275

x =  \sqrt{109275}  = 330.6 ft

3 0
3 years ago
Homework Help! ASAP
enyata [817]
1. $5.76/64 Ounces
2. $1.80/15 Ounces

1. $0.09/ounce
2. $0.12/ounce

So, in conclusion, the 64 ounce bottle is cheaper than the 15 ounce bottle by $0.03.

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3 years ago
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mario62 [17]

Answer:

  • y / cos x

Step-by-step explanation:

<u>Use trigonometry to help</u>

  • cos = adjacent side/hypotenuse
  • hypotenuse = adjacent side / cos

<u>Substitute values:</u>

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