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Finger [1]
4 years ago
9

A company has been rating television programs for more than 60 years. It uses several sampling​ procedures, but its main one is

to track the viewing patterns of​ 20,000 households. These contain more than​ 45,000 people and are chosen to form a cross-section of the overall population. The households represent various​ locations, ethnic​ groups, and income brackets. The data gathered from the sample of​ 20,000 households are used to draw inferences about the population of all households in the United States. Complete parts​ (a) and​ (b) below. What strata are used in the​ sample? Choose the correct answer below.
A. The various​ locations, ethnic​ groups, and income brackets that are represented
B. The various sampling procedures and viewing patterns
C. The number of households and people that are chosen
D. The television ratings
Why is it important to have a stratified sample for these​ ratings? Choose the correct answer below.
A. Stratified sampling ensures that all of the members of one or more groups are used.
B. Stratified sampling ensures that the television ratings are accurate.
C. Stratified sampling ensures that each segment of the population is represented.
D. Stratified sampling ensures that only households in the U.S. are sampled
Mathematics
1 answer:
Basile [38]4 years ago
3 0

Answer:

A

Step-by-step explanation:

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Evaluate -99 + 3^2•5
aksik [14]

Answer:

= - 54

Step-by-step explanation:

- 99 + 3^2•5

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= - 54

7 0
3 years ago
Bruno leaves Ms. Crabbe's office to return to the gym. As he moves 450 meters in 2 minutes, what is his velocity? Be sure to wri
Anuta_ua [19.1K]

Answer: 225 meters per second

Step-by-step explanation:

Bruno was able to reach 450 meters in just 2 minutes.

His velocity therefore, can be determined by the speed formula which is:

= Distance / Time

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His velocity is 225 m/s.

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3 years ago
Please show your work
Allushta [10]

Answer:

x = 56

Step-by-step explanation:

Use tangent function.

\tan(x)  =  \frac{18}{12}

Take the arctan

\tan {}^{ - 1} ( \frac{18}{12} )

which is about

0.98279372.

Convert from radians to degrees in you will get

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8 0
3 years ago
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Step-by-step explanation:

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When a decimal is written in word form, what indicates that the equivalent form is a mixed number and not a fraction
anastassius [24]

Explanation:

When a decimal is written in word form,

The equivalent form is a  mixed number not a fraction

Since mixed number always includes a whole part as well as fractional part but we know that fraction does not contain so .

Fraction only consists a numerator and a denominator.

For example,

We consider a number "10.25"

When we write it in a word form, first we change it in mixed fraction i.e

10.25\\\\=10\frac{25}{100}\\\\=10\frac{1}{4}

So, we get that there is a whole part i.e. 10 and remaining part i.e.    

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3 years ago
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