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borishaifa [10]
3 years ago
15

Assume that we want to construct a confidence interval. Do one of the​ following, as​ appropriate:

Mathematics
1 answer:
zhannawk [14.2K]3 years ago
3 0

Answer: Option 'a' is correct.

Step-by-step explanation:

To construct a confidence interval, we have four steps to do:

1) Recognise the sample statistic by calculating the sample mean and sample variance.

2) Recognise the confidence level i.e. 90%, 95% etc.

3) Calculate the margin of error :

As we know that Margin of error = Critical value × Standard deviation

Now, critical value in case  of t - test,

t_{\frac{\alpha}{2},v}

4) find the confidence interval which is given below:

Confidence interval = Margin of error + Sample statistics

So, Option 'a' is correct.

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Usimov [2.4K]
Using remainder theorem, we get:

P(t) = 3t^{2} + 5t - 7

Substitute t = 5 into the equation:
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