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nika2105 [10]
3 years ago
12

I just want to know if I have it right .I got D

Mathematics
2 answers:
Olenka [21]3 years ago
8 0
No its actually B if you add them correctly
yan [13]3 years ago
5 0
15 + 22 + 10 + 18 +14 + 16 + 5 + 5 = 105

I got A
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Many people believe that the daily change of price of a company's stock on the stock market is a random variable with mean 0 and
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Answer:

Step-by-step explanation:

We can use normal aproximation, assuming that the random variables are a lot of that means the sample size is large.

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Using the normal distribution table,

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Hope this helps!

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Pachacha [2.7K]

Answer:

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Then the mean and standard deviation of amount of money that the family has invested in these 10 different real estate properties is:

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Now the lowest 80% of the amount invested can be represented as follows:

P(\bar X

The value of <em>z</em> is 0.84.

*Use a <em>z</em>-table.

Compute the value of the mean amount invested as follows:

\bar x=\mu_{\bar x}+z\cdot \sigma_{\bar x}

   =225000+(0.84\times 15811.39)\\\\=225000+13281.5676\\\\=238281.5676\\\\\approx 238281.57

Thus, the amount of money separating the lowest 80% of the amount invested from the highest 20% in a sampling distribution of 10 of the family's real estate holdings is $238,281.57.

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