Answer:
Hope this helps sorry I'm in class right now
Step-by-step explanation:
Assume that we want to construct a confidence interval. Do one of the following, as appropriate:
1 answer:
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,
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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Answer:
15 cm
Step-by-step explanation:
Similar triangles are triangles which have the same shape but not the same size. This means their angle measures are equal but their side lengths are not instead they are proportional. To solve, we will set up a proportion and solve.
A proportion is two equal ratios set equal to each other. We form the ratios by finding corresponding sides (sides which match to each other on both triangles by their position). Out ratios will be one side of the small triangle over the corresponding side on the big triangle as shown below:
.
To solve the proportion, we'll cross multiply by multiplying numerator with denominator across the equal sign.