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salantis [7]
3 years ago
13

HELP!!! Which of the following sets of ordered pairs is a function?

Mathematics
1 answer:
Fantom [35]3 years ago
7 0
C, because the x value doesn’t repeat
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A professor wishes to discover if seniors skip more classes than freshmen. Suppose he knows that freshmen skip 2% of their class
KIM [24]

Answer:

We conclude that seniors skip more than 2% of their classes at 0.01 level of significance.

Step-by-step explanation:

We are given that a professor wishes to discover if seniors skip more classes than freshmen. Suppose he knows that freshmen skip 2% of their classes.

He randomly samples a group of seniors and out of 2521 classes, the group skipped 77.

<u><em /></u>

<u><em>Let p = percentage of seniors who skip their classes.</em></u>

So, Null Hypothesis, H_0 : p \leq 2%   {means that seniors skip less than or equal to 2% of their classes}

Alternate Hypothesis, H_A : p > 2%   {means that seniors skip more than 2% of their classes}

The test statistics that will be used here is <u>One-sample z proportion</u> <u>statistics</u>;

                                   T.S.  = \frac{\hat p-p}{{\sqrt{\frac{\hat p(1-\hat p)}{n} } } } }  ~ N(0,1)

where, \hat p = sample proportion of seniors who skipped their classes = \frac{77}{2521}

           n = sample of classes = 2521

So, <u><em>test statistics</em></u>  =  \frac{\frac{77}{2521} -0.02}{{\sqrt{\frac{\frac{77}{2521}(1-\frac{77}{2521})}{2521} } } } }

                               =  3.08

The value of the test statistics is 3.08.

Now at 0.01 significance level, <u>the z table gives critical value of 2.3263 for right-tailed test</u>. Since our test statistics is more than the critical value of z as 2.3263 < 3.08, so we have sufficient evidence to reject our null hypothesis as it will fall in the rejection region due to which <u>we reject our null hypothesis</u>.

Therefore, we conclude that seniors skip more than 2% of their classes.

6 0
3 years ago
What is the value of the expression shown when x = 5?
sergey [27]
3(2(5)+4)-5
3(10+4)-5
30+12-5
42-5
37
4 0
3 years ago
100 Points and Brainly.
user100 [1]

function :  y = (-x) - 6

<u>Find x-intercept</u> :

  • (-x) - 6 = 0
  • (-x) = 6
  • x = -6

<u>Find y-intercept</u> :

  • y = (-0) - 6
  • y = -6

mark these two points on both the axis and draw a straight linear graph.

passes coordinates : (0, -6), (-6, 0)

6 0
2 years ago
Read 2 more answers
The price of a technology stock has dropped to $9.79 yesterday. Today. the price fell to $9.68. Find the percentage decrease.
Citrus2011 [14]
The answer is 1.12% decrease
Explanation in image

4 0
3 years ago
Use the function below to find F(3)<br><br> F(x)=1/6x
Goryan [66]
The answer of this functional mathematical equation problem happens to be 1/18
7 0
3 years ago
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