Answer:
8790 / 6=1465
Step-by-step explanation:
From this question we know that there are a total of 8790 fish, with 6 of them being kept in one tank, and we want to know how many tanks there are. So we do 8790 / 6 which gives us 1465.
Answer: We reject the null hypothesis and conclude that the treatment group has errors that vary significantly more than the errors of the placebo group.
Step-by-step explanation:
Null hypothesis : Var1 = Var 2
Alternative hypothesis : Var1 > Var 2
The F test statistic is the ratio of squared sample standard deviation:
F= (2.4)^2 / (0.75)^2 = 5,76/ 0,5625 = 10.24
Now we have to get the critical from the F table with degrees of freedom ( n1-1,n2-1)=(23,23) :
From the F table ,F(0.05) = between 2.0050 and 2.0476 .
General rule : if the value of the test statistic is in a rejection region . Reject We reject the Null hypothesis .
F= 10.24 > 2.0476 . Therefore we reject the null hypothesis .
Conclusion: The errors of the treatment group vary more than the error of the placebo group .
You can't simplify the 30 has no common factors
Answer:
0.09 2/9 0.24 0.41
Step-by-step explanation:
Let w be the value of weekly sales in dollars
8%w = 21*40
w = 21*40*100/8
w= $10500
so she needs to sell $10500 worth of items with Option B to equal Option A this week.