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2 years ago

I'm stuck between answers B AND D, But I'm leaning towards B, I Need help though so if anyone can let me know/explain?

Mathematics

1 answer:

olya-2409 [2.1K]2 years ago

7 0

Answer:

y = 0.1x + 200

Step-by-step explanation:

Independent variable (y-intercept) = $200

Dependent variable (Slope) = 0.1 (10%)

Why?

Since Dave's salary is fixed, the $200 he is earning is an independent variable. The commission depends on his weekly sales. The weekly sales is said to be "x". Since 10% is a dependent variable, it goes together with x.

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Answer:

E) we will use t- distribution because is un-known,n<30

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Step-by-step explanation:

Step:-1

Given sample size is n = 23<30 mortgage institutions

The mean interest rate 'x' = 0.0365

The standard deviation 'S' = 0.0046

the degree of freedom = n-1 = 23-1=22

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$x±t_{0.01} \frac{S}{\sqrt{n-1} }$

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$0.0365±2.82 \frac{0.0046}{\sqrt{22} }$

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using calculator

$0.0365±0.00276$

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$(0.0365-0.00276,0.0365+0.00276)$

$(0.0338,0.0392)$

the mean value is lies between in this confidence interval

(0.0338,0.0392).

Answer:-

using t- distribution because is unknown,n<30,and the interest rates are not normally distributed.

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