Pweeb help for the good anime
2 answers:
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Remember that the degree measure of each exterior angle of a polygon can be found through the formula
where is the number of sides on the polygon.
Since a pentagon has five sides, the degree measures of each of its five sides would be:
Thus, our answer is Choice B, or 72 degrees.
Answer:
95% confidence interval for the mean city mpg for the model is 28.156±0.791 that is (27.365,28.947)
Step-by-step explanation
Confidence Interval can be calculated using M±ME where
- M is the mean miles per gallon (mpg) values for the models the EPA investigated
- ME is the margin of error from the mean
And margin of error (ME) from the mean can be calculated using the formula
ME= where
- t is the corresponding statistic in the 95% confidence level
- s is the standard deviation of the sample
- N is the sample size (16)
mean miles per gallon (mpg) values can be calculated dividing the sum of the samples by sample size, which yields 28.156
standard deviation of the sample distribution can be calculated by adding square differences from the mean and dividing by sample size, which yields 1.437
statistic in the 95% confidence level with 15 degrees of freedom is 2.131
Then ME= ≈ 0.791
95% confidence interval would be 28.156±0.791 that is (27.365,28.947)