Answer:
19 in
Step-by-step explanation:
Since, one revolution is equal to the circumference of the wheel.
C= πd
->The wheel of a compact car has a 25-in. diameter. The circumference of the compact car will be:
C= π x 25
C= 25 π in
->The wheel of a pickup truck has a 31-in. diameter. The circumference of the pickup truck will be:
C = π x 31
C= 31π in
Next, is to determine differences in distance 'd' traveled by subtraction the circumferences
d= 31π - 25π
d=6π (since π= 3.14)
d= 6 x 3.14
d=19 in
Therefore, the pickup truck wheel traveled 19in farther in one revolution than the compact car wheel
Answer:
(507.05, 592.95)
Step-by-step explanation:
Given data:
sample mean = $550, sample standard deviation S = $60.05
95% confidence interval , n = 10
For 95% confidence interval for the mean
mean ± M.E.
where M.E. is margin of error =
Substituting the values in above equation
= 2.62×18.99
=42.955
= 550±42.95
=(507.05, 592.95)
Answer: 0.0944
Step-by-step explanation:
Given : Sample size of cars : n= 150, sample size is greater than 30 , so we use z-test.
Number of cars tested do have faulty catalytic converters =42
Then the proportion of cars have faulty catalytic converters :
Critical value of z for 99% confidence level :
Formula for Margin of error :
Hence, the required margin of error =