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skelet666 [1.2K]
3 years ago
14

Help I don't understand

Mathematics
1 answer:
Leona [35]3 years ago
8 0
150 student voted for later start.
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What is the quotient of<br> 3/4 and 1/5
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3.75

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If x+ 1=23 what is the value of 3x +3?
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The shaded portion of the model represents the decimal 0.43. Which decimal completes the statement to make it true? ___ &gt; 0.4
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In a dog show , there will be a gold and a silver medal awarded. There are 5 finalist. In how many different ways can the 2 meda
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3 years ago
The weekly earnings of students in one age group are normally distributed with a standard deviation of 47 dollars. A researcher
ELEN [110]

Answer:

Option D) 340

Step-by-step explanation:

We are given the following in the question:

Alpha, α = 0.05

Population standard deviation, σ = $47

Margin of error = 5

95% Confidence Interval:

\mu \pm z_{critical}\frac{\sigma}{\sqrt{n}}

\text{Margin of error} = z_{critical}\frac{\sigma}{\sqrt{n}}

Putting the values, we get,

z_{critical}\text{ at}~\alpha_{0.05} = 1.96

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Thus, the correct answer is

Option D) 340

7 0
3 years ago
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