Mathematics, 15.11.2019 18:31 luiscoreas5370
Police recorded the average speed of cars driving on a busy street by a school. for a sample of 36 speeds, it was determined that the average amount over the speed limit for the 36 speeds was 13.2 mph with a standard deviation of 8 mph. the 90% confidence interval estimate for this sample is 10.95 mph to 15.45 mph.
a) what is the margin of error for this problem?
b) what size sample is needed to reduce the margin of error to no more than plus or minus1?
Answers: 3
= 13.2 mp
Another question on Mathematics
Mathematics, 21.06.2019 15:00
The lee family bought their home for $220,000 this year. the equation =220,000(1.038) v = 220 , 000 ( 1 . 038 ) x can be used to find the value, v, of their home after x years. which will be the value of the lee family's home in 5 years?
Answers: 1
Mathematics, 21.06.2019 19:00
1) what is the measure of the exterior angle, ∠uvw ? 2) in triangle man, what is the measure of the exterior angle at n (in degrees)?
Answers: 1
Mathematics, 21.06.2019 19:00
Kayla and alberto are selling fruit for a school fundraiser. customers can buy small boxes of grapefruit and large boxes of grapefruit. kayla sold 3 small boxes of grapefruit and 1 large box of grapefruit for a total of $65. alberto sold 1 small box of grapefruit and 1 large box of grapefruit for a total of $55. what is the cost each of one small box of grapefruit and one large box of grapefruit?
Answers: 1
Mathematics, 21.06.2019 19:30
According to the data set, where should the upper quartile line of the box plot be placed?
Answers: 1
You know the right answer?
Police recorded the average speed of cars driving on a busy street by a school. for a sample of 36 s...
Questions
Mathematics, 10.06.2021 18:50
Mathematics, 10.06.2021 18:50
Mathematics, 10.06.2021 18:50
Mathematics, 10.06.2021 18:50
SAT, 10.06.2021 18:50
Mathematics, 10.06.2021 18:50
Mathematics, 10.06.2021 18:50
Mathematics, 10.06.2021 18:50
