Aconsumer affairs investigator records the repair cost for 4 randomly selected tvs. a sample mean of $75.89 and standard deviation of $13.53 are subsequently computed. determine the 80% confidence interval for the mean repair cost for the tvs. assume the population is approximately normal.
step 1 of 2: find the critical value that should be used in constructing the confidence interval. round your answer to three decimal places.
step 2 of 2: construct the 80%80% confidence interval. round your answer to two decimal places.

(08.01)consider the following pair of equations: x + y = −2 y = 2x + 10 if the two equations are graphed, at what point do the lines representing the two equations intersect? (−4, 2) (4, 2) (−2, 4) (2, 4)

Iam a rectangle. my perimeter is 60 feet. how much are do i cover?

The avenues in a particular city run north to south and are numbered consecutively with 1st avenue at the western border of the city. the streets in the city run east to west and are numbered consecutively with 1st street at the southern border of the city. for a festival, the city is not allowing cars to park in a rectangular region bordered by 5th avenue to the west. 9th avenue to the east, 4th street to the south, and 6th street to the north. if x is the avenue number and yis the street number, which of the following systems describes the region in which cars are not allowed to park? 5th ave 9th ave