A child has 11 stuffed animals. How many ways can she choose 3 animals to take along with
2 answers:
Answer:
165 ways
Step-by-step explanation:
That notation is read "n choose m", and it indicates the number of ways one can choose m objects from a collection of n objects, if we don't care about "order".
So in your case we have
which in terms of a "factorial" notation is
11! / 3! × (11-3)!
11×10×9×8! / 3! × 8!
990 / 3
165
I've just assumed that you know what factorial means. If you don't, feel free to ask me.
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Answer:
And for this case the confidence interval is given by:
Since the confidenc einterval not contains the value 0 we can conclude that we have significant difference between the two population proportion of interest 1% of significance given. So then we can't conclude that the two proportions are equal
Step-by-step explanation:
Let p1 and p2 the population proportions of interest and let and
the estimators for the proportions we know that the confidence interval for the difference of proportions is given by this formula:
And for this case the confidence interval is given by:
Since the confidence interval not contains the value 0 we can conclude that we have significant difference between the two population proportion of interest 1% of significance given. So then we can't conclude that the two proportions are equal