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emmasim [6.3K]
3 years ago
6

How many ways to use when finding the quadratic equations​

Mathematics
1 answer:
vekshin13 years ago
6 0

Answer:

three

Step-by-step explanation:

1) solving for roots

2) Quadratic formula

3) By completing square

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Preliminary data analyses indicate that it is reasonable to use a t-test to carry out the specified hypothesis test. Perform the
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<h2>Answer with explanation:</h2>

By considering the given information, we have

Null hypothesis : H_0: \mu=35.0

Alternative hypothesis : H_1: \mu\neq35.0

Since the alternative hypothesis is two-tailed , so the test is a two-tailed test.

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Degree of freedom : n-1 = 20-1=19

Significance level = 0.01

For two tailed,  Significance level =\dfrac{0.01}{2}=0.005

By using the t-distribution table, the critical value of t =t_{19, 0.005}=2.861

Since , the observed t-value (7.25) is greater than the critical value (2.861) .

So we reject the null hypothesis, it means we have enough evidence to support the alternative hypothesis.

We conclude that there is some significance difference between the mean score for sober women and 35.0.

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  • See below

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<u>Multiply and simplify:</u>

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So all the coefficients are positive but the constant d is negative

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