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shutvik [7]
3 years ago
10

Help! Please I got till tomorrow

Mathematics
1 answer:
serious [3.7K]3 years ago
4 0

Answer:

6) Total number of students who took the test = 240

7) (2) 90% of the students who took the test ha scored equal or less Sal's score.

Step-by-step explanation:

<h3>6)</h3>

Formula to calculate 5th percentile

percentile = (# students who scored ≤ 60 / total number of students) * 100

5th  = 12/n * 100

5/100 = 12/n

0.05 = 12/n

n = 240

Total number of students who took the test = 240

<h3>7)</h3>

90th percentile means Sal scored better than 90% of people who took the test.

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Answer:

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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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Read 2 more answers
The reflexive property of congruence allows you to say that RST=____
weqwewe [10]

Answer:

The reflexive property of congruence allow us to say that RST = RST .

Option (C) is correct .

Step-by-step explanation:

Definition of Reflexive Property of congurence

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ivann1987 [24]

Answer:

p_v= P(\chi^2_{9}>11.517)=0.2419

And on this case if we see the significance level given \alpha=0.1 we see that p_v>alpha so we fail to reject the null hypothesis that the observed outcomes agree with the expected frequencies at 10% of significance.

Step-by-step explanation:

A chi-square goodness of fit test determines if a sample data obtained fit to a specified population.

p_v represent the p value for the test

O= obserbed values

E= expected values

The system of hypothesis for this case are:

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The statistic to check the hypothesis is given by:

\chi^2 =\sum_{i=1}^n \frac{(O_i -E_i)^2}{E_i}

On this case after calculate the statistic they got: \chi^2 = 11.517

And in order to calculate the p value we need to find first the degrees of freedom given by:

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And in order to calculate the p value we need to calculate the following probability:

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And on this case if we see the significance level given \alpha=0.1 we see that p_v>alpha so we fail to reject the null hypothesis that the observed outcomes agree with the expected frequencies at 10% of significance.

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