e1 of Question 1 A hypothesis test is to be performed. State the null and alternative hypotheses. Carter Motor Company claims that its new sedan, the Libra, will average better than 25 miles per gallon which is the gas mileage of its competitor. Oa Null hypothesis: mean gas mileage for the Libra = 25 mpg Alternative hypothesis: mean gas mileage for the Libra > or equal to 25 mpg b. Null hypothesis: mean gas mileage for the Libra > 25 mpg Alternative hypothesis: mean gas mileage for the Libra = 25 mpg C. Null hypothesis: mean gas mileage for the Libra < 25 mpg Alternative hypothesis: mean gas mileage for the Libra > 25 mpg Null hypothesis: mean gas mileage for the Libra = 25 mpg Alternative hypothesis: mean gas mileage for the Libra > 25 mpg Question 2 A hypothesis test is to be performed State the null and alternative hypotheses. Last month the mean waiting time ata bank was 8.4 minutes. The manager has installed a new computer system and claims that people will no longer have to wait as long. Null hypothesis: mean waiting time at the bank 8.4 minutes Alternative hypothesis: mean waiting time at the bank < or equal to 8.4 minutes Null hypothesis: mean waiting time at the bank <8.4 minutes minutes

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A: Steps and explanations are as follows:In case of any doubt, please let me know. Thank you.

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Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.