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kirill115 [55]
3 years ago
5

A polling organization asked a nation-wide random sample of 1600 new brides (those who got married in the past 2 years) the foll

owing question: "How much money did your wedding cost?" The sample average was about $20,000 with a SD of about $5,000. What most closely resembles the relevant box model? Incorrect It has 1600 tickets marked with "0"s and "1"s. Correct: It has millions of tickets. On each ticket is written a number a dollar amount. The exact average and SD are unknown but are estimated from the sample to be $20,000 and $5,000 respectively. Incorrect It has millions of tickets. The average of the tickets is exactly $20,000 and the SD is exactly $5,000. Incorrect It has millions of tickets marked with "0"s and "1"s, but the exact percentage of each is unknown.
Mathematics
1 answer:
iren [92.7K]3 years ago
4 0

Answer:

It has millions of tickets. On each ticket is written a number a dollar amount. The exact average and SD are unknown but are estimated from the sample to be $20,000 and $5,000 respectively.

Step-by-step explanation:

Given that:

sample size n = 1600

sample mean \overline x = 20000

standard deviation = 5000

The objective is to choose from the given option about what most closely resembles the relevant box model.

The correct answer is:

It has millions of tickets. On each ticket is written a number a dollar amount. The exact average and SD are unknown but are estimated from the sample to be $20,000 and $5,000 respectively.

However, if draws are made without replacement, the best estimate of the average amount for the bride will be $20,000

Similarly, the standard error for the sample mean = \dfrac{s}{\sqrt{n}}

= \dfrac{5000}{\sqrt{1600}}

= \dfrac{5000}{40}}

the standard error for the sample mean = 125

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Step-by-step explanation:

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2 years ago
Jamal draws triangle XYZ. If angle X=46 degrees, XZ = 10 degrees, and YZ=8 degrees, what is the approximate length of XY?
Mashutka [201]
<span>In triangle XYZ,
angle X=46 degrees,
XZ = 10 units and
YZ=8 units.

We will find the length of XY using cosine rule:

According to cosine rule:

a² = b² + c² - 2bc cosA (the figure is attached)
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⇒  b² = 100 - 64 - 160*cos(46)
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