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2 years ago

Help me with this please!!

Mathematics

1 answer:

Serga [27]2 years ago

7 0

Answer:

3,. 4

Step-by-step explanation:

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Write five names of 132

NemiM [27]

132
1). one hundred and thirty two.
2).100 + 30 + 2
3).1.32 x 10^2
4). 44 x 3 = 132
5). 264 divided by 2 = 132

4 0

2 years ago

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You are interested in estimating the the mean weight of the local adult population of female white-tailed deer (doe). From past

alisha [4.7K]

Answer:

$n=(\frac{2.33(19)}{7})^2 =39.996 \approx 40$

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

$\bar X$ represent the sample mean

$\mu$ population mean

$\sigma=19$ represent the assumed population standard deviation

n represent the sample size (variable of interest)

Confidence =0.98 or 98%

Me=0.07 represent the margin of error for this case

Solution to the problem

The margin of error is given by this formula:

$ME=z_{\alpha/2}\frac{\sigma}{\sqrt{n}}$ (1)

And on this case we have that ME =7 and we are interested in order to find the value of n, if we solve n from equation (1) we got:

$n=(\frac{z_{\alpha/2} \sigma}{ME})^2$ (2)

The critical value for 98% of confidence interval now can be founded using the normal distribution. And in excel we can use this formla to find it:"=-NORM.INV(0.01,0,1)", and we got $z_{\alpha/2}=2.33$ , replacing into formula (2) we got:

$n=(\frac{2.33(19)}{7})^2 =39.996 \approx 40$

So the answer for this case would be n=40 rounded up to the nearest integer

6 0

2 years ago

P(A) = 0.8, P(B) = 0.55 and P(A and B) = 0.35.<br> What is P(A or B)?

Likurg_2 [28]

<h3>Answer: 1</h3>

Work Shown:

P(A or B) = P(A) + P(B) - P(A and B)

P(A or B) = 0.8 + 0.55 - 0.35

P(A or B) = 1.35 - 0.35

P(A or B) = 1

A probability of 1 means there is 100% certainty the event happens. This must mean that there are only possible outcomes are: either event A happens, or B happens, or possibly both A and B happen simultaneously.

7 0

2 years ago

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Your family goes to a Southern-style restaurant for dinner. There are 6 people in your family.

Viktor [21]

Answer:

Number of people who order chicken dinner = 1

Number of people who order the steak dinner = 5

Step-by-step explanation:

Let

x = number of people who order chicken dinner

y = number of people who order the steak dinner

x + y = 6 (1)

14x + 17y = 99 (2)

From (1)

x = 6 - y

Substitute into (2)

14x + 17y = 99 (2)

14(6 - y) + 17y = 99

84 - 14y + 17y = 99

- 14y + 17y = 99 - 84

3y = 15

y = 15/3

y = 5

Substitute y = 5 into (1)

x + y = 6 (1)

x + 5 = 6

x = 6 - 5

x = 1

Number of people who order chicken dinner = 1

Number of people who order the steak dinner = 5

4 0

2 years ago

2y-3x=-14<br> Need to solve it into slope-intercept form.

VikaD [51]

Answer:

y=3/2x-7

Step-by-step explanation:

8 0

2 years ago

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