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2 years ago

What is a situation in which you might locate points on a coordinate grid?

1 answer:

8 0

Imagine you are a company owner, you make hats. And each of your employees make different amounts of hats, so you can plot in a grid, the employee (give her a number) and the amount of hats she makes. Then you can plot the employee number in the x axis and the amount of hats she makes in the y axis, so yo can locate in a coordinate grid, how much each employee does.

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3x-2y=18<br> Solve for y

suter [353]

Now all you have to do is divide -3x by -2 and 18 by -2 which would be:

Y= 3/2x-9

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2 years ago

Which equation would best help solve the following problem?

tia_tia [17]

Answer:

- 4.9t + 22t= 1.5 is the answer

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3 years ago

6+7 (12-5^2) equals?

pickupchik [31]

-85 is the answer (calculator)

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2 years ago

Read 2 more answers

What is a unit rate

Dafna1 [17]

Unite Rate: A rate with the value one 1 In the denominator.

Example: 3 books/ $1

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2 years ago

A simple random sample of 25 filtered 100mm cigarettes is obtained, and the tar content of each cigarette is measured. The sampl

zaharov [31]

Answer:

A) -1.40

B) -1.71

C) 0.0872

Step-by-step explanation:

Sample size = n = 25

Sample mean = x = 20.2 mg

Sample standard deviation = s = 3.21 mg

Claim: Sample mean is less than 21.1 mg

So, u = 21.1

Null Hypothesis: u ≥ 21.1 mg

Alternate Hypothesis? u < 21.1 mg

Since we have the sample standard deviation, we will use the t-distribution to answer this question

Part A) t-test statistic

The formula to calculate the t-test statistic is:

$t=\frac{x-u}{\frac{s}{\sqrt{n} } }$

Using the values, we get:

$t=\frac{20.2-21.1}{\frac{3.21}{\sqrt{25} } }\\\\ t=-1.40$

Thus, the value of t-test statistic is -1.40

Part B) Critical Value

In order to calculate the critical value we need the value of significance level and the number of degrees of freedom.

Degrees of freedom = df = n -1 = 25 - 1 = 24

Using t-table or t-critical value calculator for significance level 0.05 and 24 df the value comes out to be:

t-critical = -1.71

Since this is a left tailed test, we have considered the negative t-critical value. Rejection region will be the values less than -1.71 i.e. values which lie to left of -1.71

Part C) P-value

In order to calculate the P-value we need the t-score which we calculated in part A and the degrees of freedom.

Using the t-table or p value calculator the p value for t score of -1.40 and df 24 comes out to be:

p-value = 0.0872

Conclusion:

Since the p-value is larger than the significance level, we fail to reject the claim.

Also the test-statistic does not lie in the rejection region, so another hint that we cannot reject the claim.

Thus, no conclusion can be drawn about the effectiveness of the filters using these tests.

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2 years ago