Algebra U13 HW DAY 2 RELATIVE FREQUENCY
1. Juniors and seniors were asked if they plan to attend college immediately after graduation, seek full-time employment, or choose some other option. A random sample of 100 students was selected from those who completed the survey. Scott started to calculate the relative frequencies to the nearest thousandth.
a. Complete the calculations of the relative frequencies for each of the blank cells. Round your answers to the nearest thousandth.
b. A school website article indicated that “A Vast Majority of Students from our School Plan to Attend College.” Do you agree or disagree with that article? Explain why agree or why you disagree.
c. Why are the relative frequencies for the juniors and seniors misleading?
2. Solve, graph, and write your solution in interval notation.
–2(x + 7) ≥ –3x + 11
3. Here is the table that you helped fill in on last night’s homework.
To Fly / Freeze Time / Invisibility / Super Strength / Telepathy / TotalFemales / 17 / 12 / 11 / 4 / 13 / 57
Males / 16 / 1 / 6 / 18 / 2 / 43
Total / 33 / 13 / 17 / 22 / 15 / 100
Calculate the relative frequencies for each of the cells to the nearest hundredth. Place the relative frequencies in the cells of the following table. (The first cell has been completed as an example.)
Females / = .17
Males
Total
a. When selecting a student at random, what is the likelihood that you will select a male student that picked “super strength?” Is this a joint or marginal relative frequency?
b. When selecting a student at random, what is the likelihood that you will select a student who picked “freeze time?” Is this a joint or marginal relative frequency?
c. When selecting a student at random, what is the likelihood that you will select a female student? Is this a joint or marginal relative frequency?
d. Why is it not fair to say that females prefer the super power “to fly” compared to males?
4. Factor: