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LuckyWell [14K]
2 years ago
6

At an ice cream shop, 4 of the last 10 cones sold had cookies and cream ice cream. Considering this data, how many of the next 1

5 cones sold would you expect to have cookies and cream ice cream?
Mathematics
2 answers:
telo118 [61]2 years ago
7 0
The answer is 6 cones
ale4655 [162]2 years ago
6 0

Answer:

6 cones

Step-by-step explanation:

4/10=2/5

2/5x3x3=6/15

6 cones

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A survey of 85 families showed that 36 owned at least one DVD player. Find the 99% confidence interval estimate of the true prop
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Step-by-step explanation:

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Now, the  99% confidence level will be :

\hat{p}\pmz_{\alpha/2}\sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}\\\\=0.42\pm(2.576)\sqrt{\dfrac{0.42(1-0.42)}{85}}\\\\\approx0.42\pm0.053\\\\=(0.42-0.053,\ 0.42+0.053)=(0.367,\ 0.473)

Hence, the  99% confidence interval estimate of the true proportion of families who own at least one DVD player is  (0.367,\ 0.473)

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