Answer: -1.51
Step-by-step explanation:
Let be the population mean rating of car.
As per given , we have
Since population variance is known, so we use z-test.
Test statistic :
, where n= sample size
= Sample mean
= variance
As per given ,
n=300
Put these values in formula we get
Hence, the value of the test statistic is z= -1.51 .
Answer: Yes
Step-by-step explanation: Because none of the xs, (3,6,7,8) are not the same, you are good to go!
Answer:
71894 hope it help
Step-by-step explanation:
(p - 0.15p) + 1.99
This is the equation to solve.
p minus 15% of p, plus 1.99 for shipping costs.