Answer:
Step-by-step explanation:
Data given and notation
represent the sampe size for A
represent the sample size for B
represent the sample deviation for A
represent the sample deviation for B
represent the significance level provided
F test is a statistical test that uses a F Statistic to compare two population variances, with the sample deviations s1 and s2. The F statistic is always positive number since the variance it's always higher than 0. The statistic is given by:
Solution to the problem
System of hypothesis
We want to test if we have the same variation, so the system of hypothesis are:
H0: 
H1: 
Calculate the statistic
Now we can calculate the statistic like this:
B
If you need help to visualize it, think of 48 circles. Circle groups of 6 circles. Grouping the circles, is the same as plain dividing 48 by 6 without the pictures.
Answer:
Monster ski
Step-by-step explanation:
It's cheaper
Step-by-step explanation:
(4-x)(4-x)=16-4x-4x+x= 16-7x
.........
It will take 50 minutes for the turtle and snail to meet.
because they are all moving at feet per minute we can create a formula
total feet = (turtle feet per minute) + (snail feet per minute)
300 = 5m +1m
combine like terms
300 = 6m
divide both sides by 6
50=m
