General Form of a Quadratic Function
In the following video he calculates the ‘k’ from vertex (h,k) by plugging in the value of h into the original quadratic function. You can also use k = c-(b^2)/(4a). Both yield the same ‘k’ value.
In the following video he calculates the ‘k’ from vertex (h,k) by plugging in the value of h into the original quadratic function. You can also use k = c-(b^2)/(4a). Both yield the same ‘k’ value.
These questions take a long time so watch as many of the following videos until you understand them.
For a complete lesson:
https://www.youtube.com/watch?v=rfs81HVsjn0
https://www.youtube.com/watch?v=ND-sR642LF0
TIPS:
EXAMPLES:
1A 2B 3A 4D 5B 6C 7D 8C 9C 10D
11) 68.3 %
12) 66.9%
13) -1. Mean is 1 less than the median.
14) 95
15) 3/2 = 1.5
16) 46
17) 1.44
18) 57.648< µ < 62.352
19) 226
20a) $1182.10 < µ < $1223.90
20b) increase sample size n, or decrease confidence level
21) 97.7%
22) No, it doesn’t follow a bell-shaped curve, but more of a lop-sided curve.
23a) µ = 79.4, σ = 8.4
b) 24
c) 66.7%
d) 36 (all scores)
e) 100%
Definition:
https://www.youtube.com/watch?v=Q6Lj_8yt4Qk
Normal Distribution:
Standard Normal Distribution: FYI He says “moo” for “mu” which I pronounce as “mew” in class.
How to Read Z-scores from the table:
https://www.youtube.com/watch?v=xHcxq8JMLJQ
https://www.youtube.com/watch?v=FuZ-dgnpQaY
https://www.youtube.com/watch?v=3gOYis7K-Q4
https://www.youtube.com/watch?v=ZCJhXrqaA88