We are comparing years to number of tigers. What is the dependent variable?
Tigers
100
evaluate f(4) at
x+6 x>5
f(x)= x^2+5 x<5
21
100
Jaclyn uses a 4-digit pin number to access her TV's parental code. If none of her digits repeat, what is the probability that someone would randomly guess her pin on the first 3 tries?
.0595 %
100
if the scores 12,25,18,13,and x have a mean of 19, what is the value of x?
27
200
What is the range of (x+3)^2
[0, inf)
200
If the regression model for the Charlotte Population was
P(y)= 183(1.0468)^x then can we say this represents growth or decay?
Growth
200
evaluate f(5) at
f(x)= x+6 x>5
x^2 x<5
No solution
200
How many different 11 letter wods can be made just using the letters in Mississippi?
34650 words
200
What is the mode and how do you find it?
Most occurring data number, and you find it by looking at the data set.
300
What shifts does the graph of y= lx+2l -2 make?
left two down two
300
If the regression model for number of elephants is p(y)= 1211y+102,952 what would your prediction be of the number of tigers in year 23 of the model?
What is 130,805
300
What is the fence
f(x)= x^7+5 x>8
3x^4+9 x<=8
8
300
What is the difference between a combination and a permutation?
Combination: order does not matter
Permutation: order does matter
300
Jim's test score was a 78 which was just one standard deviation below the mean. If the standard deviation is 3, what was the average test score?
81
400
What is the solution set of x of the equation y=x^2-9
{3,-3}
400
If the linear regression model looks like:
y=-.26x+8, what does the slope tell us about our equation?
For every x, y goes down .26
400
if f(x) = 4(x)^2, then evaluate f(x+1)
4x^2+8x+4
400
On a ten foot stairway, a little girl places one stuffed animal on each stair. There are ten stairs. How many different orders can she put her stuffed animals?
3628800
400
An amateur golfer calculated his golfing average for the season. If the data are normally distributed, about how many of his 50 games were within one standard deviation of the mean?
34
500
If f(x) = 8x^2+6, what is the y-intercept?
(0,6)
500
Are these r^2 values good?
.854
.995
.321
.5
okay
yes
bad
not good
500
Give an example where a piecewise function would be beneficial.
Answers vary
500
What is an example of Inclusive probability
Answers vary
500
On a standardized test, the mean was 88 and the standard deviation was a 4.5. What is the best approximation of the percentage of scores that will fall in the range of 79 and 97