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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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sleet_krkn [62]

Answer:

-7/8

Step-by-step explanation:

y = 1/8 -1

y = 1/2^3 -1

y = 1 - (2^3)/2^3

y = 1-8/2^3

y = 7/2^3

y = -7/8

hope that helps <3

7 0
3 years ago
Please help me!! <br> solve 31 = x + 25.5
serious [3.7K]

Answer:

x = 5.5

General Formulas and Concepts:

<u>Pre-Algebra</u>

  • Equality Properties

Step-by-step explanation:

<u>Step 1: Define</u>

31 = x + 25.5

<u>Step 2: Solve for </u><em><u>x</u></em>

  1. Subtract 25.5 on both sides:                    5.5 = x
  2. Rewrite:                                                      x = 5.5
6 0
3 years ago
Read 2 more answers
On a trip to Spain, Kelly bought a piece of jewelry that cost $50.75. She paid for it with her credit card, which charges a fore
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6 0
3 years ago
Help i don’t know how to do this
lyudmila [28]

Answer:

ok so first you add all the prices together.

$9:00+$7:00+$8:00+$6:00+$4:00=34

then divide 34 by the number of prices.

34/5

then you get the mean

$6.8 is the mean

Step-by-step explanation:

7 0
2 years ago
A certain bay with very high tides displays the following behavior. In one 12-h period the water starts at mean sea level, rises
Firdavs [7]

Answer:

the required equation is; y = 21 sin(πt/6)

Step-by-step explanation:

Given the data in the question;

Water rises above sea level = 21 ft

Water drops below sea level = 21 ft

so

maximum = 21 ft and also

minimum = 21 ft

Amplitude = ( maximum + minimum ) / 2

Amplitude = ( 21 + 21 ) / 2

Amplitude = ( 21 + 21 ) / 2 = 42/2 = 21 ft

Period = 12 hours

and we know that; period = 2π/b

so

12 = 2π/b

12b = 2π

b = 2π / 12

b = π/6

Standard equation for simple harmonic is; y = asin(bt)

we substitute

y = 21 sin(πt/6)

Hence the required equation is; y = 21 sin(πt/6)

7 0
3 years ago
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