caroline5993
16.10.2021 •
Mathematics
A random sample of 100 automobile owners in the state of New Jersey shows that an automobile is driven on average 23,500 kilometers per year with a standard deviation of 3,900 kilometers. Assume the distribution of measurements to be approximately normal. (a) Construct a 99% two-sided confidence interval for the average number of kilometers an automobile is driven annually in New Jersey. (b) Construct a 90% two-sided confidence interval on σ, the standard deviation of kilometers an automobile is driven annually in New Jersey
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Ответ:
1- 42_ 2- 30 becasue if u multply 20 by 80 and get 1600 to minus everying and get 30
Step-by-step explanation:
The others are hard but ther ya go