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otez555 [7]
3 years ago
12

A financial economist is studying married couples in which both spouses work. He wants to compare the mean income earned by husb

ands with the mean income earned by their wives. Should he use independent sampling or dependent sampling, and why?
________Independent sampling. The two spouses are separate people with different jobs, so the husband's income doesn't depend on his wife's income.
________-Independent sampling. How he selects the husband is independent of how he selects the wife.
__________Dependent sampling. The husband's income depends to some degree on his wife's income.
________Dependent sampling. He needs to select couples for his sample, so whether a particular wife is included depends on whether her husband is included.
Mathematics
1 answer:
kvasek [131]3 years ago
6 0

Answer: Ideally the researcher should use independent sampling

Step-by-step explanation: Independent samples are samples that are independently selected. This means its observations do not depend on the values other observations. While dependent samples (also called paired samples) are that have dependent or related values. Basically dependent samples. Dependent samples occur when you have two samples that do affect one another. independent samples. Independent samples occur when you have two samples that do not affect one another.

Ideally the researcher should use independent sampling because (as stated in the question) the husband and wife are different people with different jobs even though they're married. We assume this because the question doesn't suggest otherwise or give any other details.

You could use dependent sampling but you would be assuming that what they earn as individuals depends on their marriage. (For example if the wife spends more time with the kids she would be unable to work over time at work this affecting her earnings, the husband and wife own a business they both work in etc.)

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Trigonometry . What
Kryger [21]

Answer:

Ques 11: 123.08 meters.

Ques 12: 269.4 meters.

Ques 13: 211.27 meters.

Step-by-step explanation:

Ques 11: We have that the angle of elevation from the ship to the top of the lighthouse is 18° and the height of the lighthouse is 40 m.

It is required to find the distance of the ship from the shore, say 'x' m.

As, we have, \tan \theta=\frac{opposite}{adjacent}

⇒ \tan 18=\frac{40}{x}

⇒ x=\frac{40}{\tan 18}

⇒ x=\frac{40}{0.325}

⇒ x = 123.08 m.

Thus, the distance of the ship from the shore is 123.08 meters.

Ques 12: We have, length of the kite is 300 m and the angle made by the string is 64°.

It is required to find the height of the kite, say 'x' m.

As, we have, \sin\theta=\frac{opposite}{hypotenuse}

⇒ \sin 64=\frac{x}{300}

⇒ x=300\times \sin 64

⇒ x=300\times 0.898

⇒ x = 269.4 m.

Hence, the height of the kite is 269.4 meters.

Ques 13: We have, the wreckage is found at the angle of 12° and the diver is lowered down by 45 meters.

It is required to find the distance covered by the diver to reach the wreckage, say 'x' m.

As, we have, \tan \theta=\frac{opposite}{adjacent}

⇒ \tan 12=\frac{45}{x}

⇒ x=\frac{45}{\tan 12}

⇒ x=\frac{45}{0.213}

⇒ x = 211.27 m.

Thus, the distance covered by the diver to reach the wreckage is 211.27 meters.

5 0
3 years ago
Search your home for a rectangular prism. Some examples are a cereal box, a CD case, or a coffee table. Measure your prism using
amm1812

Answer:

where u getting it from?

Step-by-step explanation:

4 0
3 years ago
How many solutions does this equation have?<br><br> 8 − 6s = –7s
Valentin [98]

Answer:

One solution

Step-by-step explanation:

8-6s = -7s (given)

8=-s

s=-8

∴ There is only one solution to this equation since s can only equal to -8 to satisfy the equation.

Hope this helps :)

4 0
3 years ago
Read 2 more answers
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schepotkina [342]
The answer to the problem is A) 20 feet below sea level
6 0
4 years ago
A square measures 6r centimeters on each side. Which monomial represents the area of the square?
OleMash [197]

Answer:

Option 4

Step-by-step explanation:

So we know that the area of a square is found by s^2. This means that we can just look for (6r)^2, since 6r is our side length! Let's see...We know that (6r)^2 is equal to 6^2 times r^2 because of the distributive property of exponents. Therefore, option 4 is our right answer. 36 is 6^2 and r^2 is r^2.

3 0
3 years ago
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