Answer:
Step-by-step explanation:
- The Z-score allows you to decide if your sample is different from the population mean. In order to use z, you must know four things:
- The population mean.
- The population standard deviation.
- The sample mean.
- The sample size.
- Usually in stats, you don’t know anything about a population, so instead of a Z score you use a T-Test with a T Statistic.
- The major difference between using a Z score and a T statistic is that you have to estimate the population standard deviation. The T test is also used if you have a small sample size (less than 30).
Ok so firsst you do 40-20=20 20÷2.50=8 so that means amelia needs to babysit 8 hours to get $40
hope this helpd
Answer:
It's 1/4
Step-by-step explanation:
It's closer to 0 than the other fractions
Yes pi, which letter please?7th grade is not an average
Answer:
42
Step-by-step explanation:
2 times 6 is 12
So 7 times 6 is 42 ounces
