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3 years ago

13

Mr. Mace's class is planning a field trip, and 3/5 of his students want to go to Chicago. Of those who want to go to Chicago, 2/

3 want to go to Navy Pier. What fraction of the class wants to go to Navy Pier?

1 answer:

MrMuchimi3 years ago

7 0

Eheueiroeoeorprprprprorororurjrjrjr

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Need help what are the classifications of each system

ratelena [41]

You can graph them on Desmos, then use this attachment to find out the classification.

In the first system, they're the same line and have infinitely many solutions, therefore the answer is consistent, dependent.

In the second system, they're parallel lines with no solution, therefore the answer is inconsistent.

In the third system, they intersect and they have one solution, therefore the answer is consistent, independent.

In the fourth system, they're the same line and have infinitely many solutions, therefore the answer is consistent, dependent.

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3 years ago

What is the slope of the line x = −5? a) undefined b) 0 c) -5 d) 5

nlexa [21]

Learn this...it helps
HOY -- horizontal line, 0 slope, represented by y = a number
VUX -- vertical line, undefined slope, represented by x = a number

now u have : x = -5.....this is a vertical line with an undefined slope

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3 years ago

Ann rolls a 6 sided number cube and then chooses a card from a set numbered 1 through 9. What is the probability that she will r

Licemer1 [7]

5/9 to chose odd card, 3/6 to roll even number

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3 years ago

When the sample size and the sample proportion remain the same, a 90 percent confidence interval for a population proportion p w

deff fn [24]

Answer:

A 90% confidence interval for <em>p</em> will be <u>narrower </u>than the 99% confidence interval.

Step-by-step explanation:

The formula to compute the (1 - <em>α</em>) % confidence interval for a population proportion is:

$CI=\hat p\pm z_{\alpha /2}\sqrt{\frac{\hat p(1-\hat p)}{n}}$

Here $\hat p$ is the sample proportion.

The margin of error of the confidence interval is:

$MOE= z_{\alpha /2}\sqrt{\frac{\hat p(1-\hat p)}{n}}$

The MOE is dependent on:

Confidence level
Standard deviation
Sample size

The MOE is directly related to the confidence level and standard deviation.

So if any of the two increases then the MOE also increases, thus widening the confidence interval.

And the MOE is inversely related to the sample size.

So if the sample increases the MOE decreases and vice versa.

It is provided that the sample size and the sample proportion are not altered.

The critical value of <em>z</em> for 90% confidence level is:

$z_{\alpha/2}= z_{0.10/2}=z_{0.05}=1.645$

And the critical value of <em>z</em> for 99% confidence level is:

$z_{\alpha/2}= z_{0.05/2}=z_{0.05}=1.96$

So as the confidence level increases the critical value increases.

Thus, a 90% confidence interval for <em>p</em> will be narrower than the 99% confidence interval.

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3 years ago

You and 2 friends go diving for lobsters. the maximum number of lobsters you may have is 18 you have 7

Bad White [126]

You can get 11 more lobsters if that is what the question is

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