Arandom sample of the price of gasoline from 2020 gas stations in a region gives the statistics below. complete parts a. through c). y overbaryequals=$4.494.49, sequals=$0.260.26 a) find a 9595% confidence interval for the mean price of regular gasoline in that region.

Find the average speed of a rabbit that runs a distance of 22 m in a time of 1.8 s .

Three times the sum of a number and seven is negative thirty-six. what is the number?

1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?