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2 years ago

WILL MARK BRAINLIEST HELP ASAP ASAP

Mathematics

1 answer:

tia_tia [17]2 years ago

5 0

Answer:

Step-by-step explanation:

There are 35 students and if you add the 1st, 2nd, 3rd, and 4th years together you get the total number of students who took the Humanities class as their major.

But, you also have to add the other 2 majors as well.

Sciences: 11 student through the 4 years

Other: 8 students through the 4 years

You only need to look at the Humanities class divided by the total number of students in the statistics course and then you will get your answer.

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A professor finds that the average SAT score among all students attending his college is 1150 ± 150 (μ ± σ). He polls his class

solniwko [45]

Answer:

Step-by-step explanation

Hello!

Be X: SAT scores of students attending college.

The population mean is μ= 1150 and the standard deviation σ= 150

The teacher takes a sample of 25 students of his class, the resulting sample mean is 1200.

If the professor wants to test if the average SAT score is, as reported, 1150, the statistic hypotheses are:

H₀: μ = 1150

H₁: μ ≠ 1150

α: 0.05

$Z= \frac{X[bar]-Mu}{\frac{Sigma}{\sqrt{n} } } ~~N(0;1)$

$Z_{H_0}= \frac{1200-1150}{\frac{150}{\sqrt{25} } } = 1.67$

The p-value for this test is 0.0949

Since the p-value is greater than the level of significance, the decision is to reject the null hypothesis. Then using a significance level of 5%, there is enough evidence to reject the null hypothesis, then the average SAT score of the college students is not 1150.

I hope it helps!

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