winstonbendariovvygn
10.04.2020 •
Mathematics
Fifteen SmartCars were randomly selected and the highway mileage of each was noted The analysis yielded a mean of 47 miles per gallon and a sample standard deviation of 5 miles per gallon Which of the following would represent a 90% confidence interval for the average highway mileage of all SmartCars? a. 47 plusminus (1.753*(5 + 3.8730) b. 47 plusminus (1.345*(5 + 3.8730) c. 47 plusminus (1.765*(5 + 3.8730) d. 47 plusminus (1.645*(5 + 3.8730)
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Ответ:
Step-by-step explanation:
1 1/3 yards= 48in
2 1/3 yards = 84in
3 1/3 yards = 120in
4 1/3 yards = 156in
5 1/3 yards= 192in
6 1/3 yards= 228in