Considering that we have the standard deviation for the sample, the t-distribution will be used, and the critical value is t = 2.6682.
<h3>When should the t-distribution and the z-distribution be used?</h3>
- If we have the standard deviation for the sample, the t-distribution should be used.
- If we have the standard deviation for the population, the z-distribution should be used.
In this problem, σ is not known, hence we get the standard deviation of the sample from the histogram and the t-distribution is used.
Using a t-distribution calculator, considering a <em>confidence level of 99%</em> and 56 - 1 = <em>55 df</em>, the critical value is t = 2.6682.
More can be learned about the t-distribution at brainly.com/question/16162795
<u><em>Answer:</em></u>44 pounds = 20 kg
<u><em>Explanation:</em></u><u>We are given that:</u>
1 kg = 2.2 pounds
To convert 44 pounds into kg, all we have to do is <u>cross multiplication</u> as follows:
1 kg .................> 2.2 pounds
?? kg .................> 44 pounds
<u>Now, we solve as follows:</u>
4 kg =
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pounds
Hope this helps :)
The area of the mirror (v) is 9.5x7.5=71.25 inches
I know the correct answer but first you have to answer my math question