Question

1. Table 2: Intellegence Rating of 100 students.

   Intellegence Rating	Frequency
   5	15
   6	27
   7	39
   8	16
   9	3

2. If we assume the participants in the survey of 100 students are a “typical” sample of students. What is the probability of selecting a student with an intellegence rating of 6? Make sure to show your calculations for full credit.
4. What is the probability of selecting student with a Intellegence Rating of 8 or 9? P(8 or 9). Use the Addition Rule. Show your work for full credit.

Answer 1

Answer:

11. 75% chances is the prediction of rain tomorrow,i.e.,P[raining tomorrow]=0.75

P[not raining tomorrow]=1-P[raining tomorrow]=1-0.75=0.25

12. P[selecting a student with rating 6]=,where n is the total number of students and is the frequency at 6.

Here,n=100

Hence,P[selecting a student with rating 6]=

13. P[selecting a student with rating of 8 or 9]=P[selecting a student with rating 8]+P[selecting a student with rating 9]

P[selecting a student with rating 8]=,where n is the total number of students and is the frequency at 8.

P[selecting a student with rating 9]=,where n is the total number of students and is the frequency at 9.

NOTE:

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