Answer:
Step-by-step explanation:
<h2>YOU WILL DO GREAT</h2>
Answer:
B. 427
Step-by-step explanation:
The median is the middle number. When you cross out numbers on the list you end up with 420 and 434. We take the average:
(420 + 434)/2 = 427
Answer:
Step-by-step explanation:
We would set up the hypothesis test. This is a test of a single population mean since we are dealing with mean
For the null hypothesis,
µ = 12
For the alternative hypothesis,
µ < 12
Since the population standard deviation is given, z score would be determined from the normal distribution table. The formula is
z = (x - µ)/(σ/√n)
Where
x = sample mean
µ = population mean
σ = population standard deviation
n = number of samples
From the information given,
µ = 12 minutes
x = 8 minutes
σ = 12 minutes
n = 36
z = (8 - 12)/(12/√36) = - 4/2 = - 2
Test statistic = - 2
Answer:
15 is the multiply of the number
