3 years ago

I need help, i would appreciate it a lot !!

Mathematics

1 answer:

Licemer1 [7]3 years ago

7 0

I believe is A

hope it is A

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You measure the lifetime of a random sample of 64 tires of a certain brand. The sample mean is x¯=50 months. Suppose that the li

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(48.3875, 51.6125)

Step-by-step explanation:

At 99% level of significance

$\alpha=1-0.99=0.01$

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From the normal standard deviation table $Z_{a\lpha /2}=2.33$

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Therefore, there’s 99% confidence that the mean lifetime of a certain brand of tires is between 48.3875 and 51.6125

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3 years ago

What is the mean of the data set? Fifth Grade Jump Distance

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The mean of the data set is 42.

The arithmetic mean is found by adding the numbers and dividing the sum by the number of numbers in the list.

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