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2 years ago

PLEASE HELP

Mathematics

1 answer:

UNO [17]2 years ago

4 0

6.3-4.6=1.7%. You subtract the percentages to find the total percentage after the percentage dropped 4.6 from 6.3

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For the past 40 days. Naomi has been recording the number of customers at her restaurant between 10:00 AM and 11:00 AM. During t

igor_vitrenko [27]

Answer:

The experimental probability there will be fewer than 20 customers on the forty-first day is 5/8, .625, 62.5%.

Step-by-step explanation

4 0

2 years ago

Help me, thank you:)

denis-greek [22]

Which problem or all?

6 0

2 years ago

Plz help on all of this these

soldier1979 [14.2K]

7.) 170
8.) 9
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10.) -124
11.) -99
12.) 84
13.) 88
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3 years ago

Answer:

uranmaximum [27]

Answer:

DOMAIN: -5, 2, 3 ,4

RANGE: 1, 3, 3 , 5

FUNCTION: Yes

Step-by-step explanation:

Since there is one value of y for every value of x this is a function.

The domain is just the x value (first number) and the range is just the y value(second number).

3 0

2 years ago

It is known that the population variance equals 484. With a .95 probability, the sample size that needs to be taken to estimate

Hitman42 [59]

Answer:

The minimum sample size is n = 75 so that the desired margin of error is 5 or less.

Step-by-step explanation:

We are given the following in the question:

Population variance = 484

Standard deviation =

$\sigma^2 = 484\\\sigma =\sqrt{484} = 22$

Confidence level = 0.95

Significance level = 0.05

Margin of error = 5

Formula:

Margin of error =

$E = z\times \dfrac{\sigma}{\sqrt{n}}\\\\n = (\dfrac{z\times \sigma}{E})^2$

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

Putting values, we get

$E\leq 5\\\\1.96\times \dfrac{22}{\sqrt{n}} \leq 5\\\\\sqrt{n} \geq 1.96\times \dfrac{22}{5}\\\\n \geq (1.96\times \dfrac{22}{5})^2\\\\n \geq 74.373$

Thus, the minimum sample size is n = 75 so that the desired margin of error is 5 or less.

3 0

2 years ago