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blsea [12.9K]
3 years ago
7

What is the interquartile range of the data set? {48, 50, 65, 60, 80, 42, 45, 50, 42, 55, 45}

Mathematics
1 answer:
Tcecarenko [31]3 years ago
6 0
The answer would ether be 16.5 or 10. Sorry, I'm not sure haven't done interquartile range in a little while.
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Answer:

ME= 2.33*\sqrt{\frac{0.096*(1-0.096)}{250}}= 0.0434

Step-by-step explanation:

For this case we have a sample size of n = 250 units and in this sample they found that 24 units failed one or more of the tests.

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\hat p = \frac{24}{250}= 0.096

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\hat p \pm z_{\alpha/2} \sqrt{\frac{\hat p(1-\hat p)}{n}}  

For the 98% confidence interval the value of \alpha=1-0.98=0.02 and \alpha/2=0.01, with that value we can find the quantile required for the interval in the normal standard distribution.  

z_{\alpha/2}=2.33  

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