Q3-Q1=IQR is the formula.
Answer:
+/- 1.9983
Step-by-step explanation:
The critical values for a confidence interval for the population mean, with population standard deviation not known, are obtained from the student's t distribution.
The sample size is given as 64. The degrees of freedom will thus be;
sample size - 1 = 64 - 1 = 63
The confidence level is given as 95%. The level of significance will thus be;
100 - 95 = 5%.
The area in the right-tail will thus be 2.5%. Therefore, we looking for a t-value such that the area to its right is 2.5% and the degrees of freedom being 63. From the t-tables we have;
+/- 1.9983
Answer:
1. -b^2+13b
2. 1.9y^2-1.4y+4
Step-by-step explanation:
1. -0.8b^2+7.4b+(5.6b-0.2b^2)
Simplify: -0.8b^2+7.4b+5.6b-0.2b^2
Add like terms: (-0.8b^2-0.2b^2)= -1b^2/-b^2 (7.4b+5.6b)= 13b
Answer: -b^2+13b
2. (7.3y-y^2+4)+0.5y^2-(8.7y-2.4y^2)
Simplify: 7.3y-y^2+4+0.5y^2-8.7y+2.4y^2
Add like terms: (2.4y^2-y^2)= 1.9y^2 (7.3y-8.7y)= -1.4y (don't forget about the 4)
Answer: 1.9y^2-1.4y+4
Answer:
It's the top one. No further explanation is needed.
Step-by-step explanation:
We know that a square is made-up of four equivalent sides, and four right angles. So, by process of elimination, you are left with the top one.
Another way of getting the same answer is we know that the only quadrealateral with four equivalent sides is a square, so the top answer is correct.
There you have two, different explainations and ways of getting the same answer, proving that it is correct. Hope that helps!
