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Sergeeva-Olga [200]
3 years ago
15

Write the ratio for sin A. A 17 15 с B sin A=

Mathematics
1 answer:
Firlakuza [10]3 years ago
6 0

Answer:

0.292371705 if A=17

0.258819045 if A=15

Step-by-step explanation:

What are all the other options i dont understand

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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
Don’t answer if you don’t know, plz. Thanks.
horrorfan [7]
B. I did this test too.
7 0
2 years ago
15 = r -6 what does r equal
77julia77 [94]

Answer:

21-6=15

Step-by-step explanation:

3 0
3 years ago
Can someone help giving branliest to first correct answer
yanalaym [24]
Y=29
Issheishwsihwsuwh i dont know why 8 have to write 20 charcters
7 0
2 years ago
Pls help this is a test help will mark brainliest
PilotLPTM [1.2K]

Answer:

X= 46

Y= 23

:)

..........................

6 0
3 years ago
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