Question

Calculate the upper and lower limit for a 95% confidence interval about this mean.

A family needs a new car, but isn't sure they can fit the payment into their budget. A sample of 36 months of grocery bills yields a mean of $94 with a standard deviation of $10. If the upper limit of a 95% confidence level is below $100, the family can afford to buy the car.

Standard error = (standard deviation)/(square root of sample size)

Upper limit (dollars and cents) ___________

Lower limit (dollars and cents) __________

Answer 1

i got 1.67 for SE

Answer 2

upper limit $97.267
lower limit $90.733

Answer 3

@awesomedude2078

Answer 4

thanks

Answer 5

100%

Answer 6

No problem