1. The following are baby height measurements (in centimeters) of a sample of young infants participating in a study looking at gestational age and growth rate.
31 42 57 38 29 45 63 34 32 40 42 30
1. What is the sample mean rounding to 2 decimal points?
2. What is the sample median?
3. What is the standard deviation rounding to 2 decimal points?
4. What is the variance rounding to 2 decimal places?
5. What is the 25th percentile rounding to 2 decimal places?
6. What is the 75th percentile rounding to 2 decimal places?
7. What is the interquartile range (iQR)?
8. True or False: 63 is an outlier.
9. Choose from the following relative frequency histograms that corresponds with the data broken up into four groups <= 30, 31 - 40, 41 -50, >50.
10. "On a scale of 10, 10 being the best, how well do you think you did on the first homework assignment?" This question is an example of what kind of data?
a. Continuous
b. Dichotomous
Cl Ordinal
d. Categorical
11. Technically, a fever is any body temperature above the normal 98.6° F; however, in practice a significant fever is commonly defined as any temperature above 100.4° F. Temperature is an example of what kind of data
a. Continuous
b. Discrete
C. Ordinal
d. Categorical
12. For a particular study, smoking status is broken into three categories nonsmoker, former, and current. This is an example of what kind of data?
a. Continuous
b. Discrete
c. Ordinal
d. Categorical
Consider the following weight readings in pounds below:
A = {weight between 100 170}
B = {weight 171}
C = [weight < 150)
13. True or False: The events A and B mutually exclusive.
14. True or False: The events A and C mutually exclusive.
15. SupposePr(A) = 0.35, Pr(B) 0.55. What is the Pr(weight > 100)?
16. What does A u C mean?
A. A and C occur = {100 <= weight <= 150}
B. A or C or both simultaneously = { weight <=170}
C. A or C occur = {weight <= 170}
D. A or C or both occur simultaneously = {100 <= weight <= 150}
17. What does A n C mean?
A. A and C occur = {100 <= weight <- 150}
B. A or C or both simultaneously = { weight <= 170}
C. A or C occur = {weight <= 170}
D. A or C or both occur simultaneously = {100 <- weight <- 150}
18. What does B U C mean?
A. B and C occur = {weight <= 150 or weight >= 171}
B. B or C or both occur simultaneously= PI this cannot happen as they are mutually exclusive events
C. B or C or both occur simultaneously = {weight <= 150 or weight >=
D. B and C occur = this cannot happen as they are mutually exclusive events
19. What does B n C mean?
A. B and C occur = {weight <= 150 or weight >= 171}
B. B or C or both occur simultaneously = {(1)} this cannot happen as they are mutually exclusive events
C. B or C or both occur simultaneously = {weight <= 150 or weight >=170}
D. B and C occur = {0} this cannot happen as they are mutually exclusive events
20. What is the probability of Bc given the information in question 3?
The radioactive spiders are loose on campus and this time they're not alone. Below is a table of the different radioactive animals along with three different mutant abilities victims have now claimed to gain. The table has the frequency of people reporting each symptom along with a total number of people bitten by that animal. Note that not everyone bitten ended up gaining a mutant ability.
|
Mutant Ability
|
Radioactive Animal
|
|
Spider
|
Possum
|
Flea
|
Rat
|
Total
|
|
No Ability
|
3
|
7
|
2
|
5
|
|
|
Mind Reading
|
9
|
1
|
6
|
4
|
|
|
Agility
|
10
|
5
|
3
|
1
|
|
|
Regeneration
|
2
|
4
|
7
|
11
|
|
|
Total
|
|
|
|
|
80
|
21. What is the probability of no mutant ability rounding to 3 decimal places?
22. What is the probability of being bitten by a flea rounding to 3 decimal places?
23. What is the probability of gaining the agility mutation AND bitten by a spider rounding to 3 decimal places?
24. What is the probability of having the mind reading mutation AND bitten by a spider rounding to 3 decimal places?
25. What is the probability of mind reading given a person was bitten by a possum rounding to 3 decimal places? (i.e. What is Pr(mind reading bitten by possum)?)
26. What is the probability of agility given the person was bitten by a rat rounding to 3 decimal places? (i.e. What is Pr(agilitylbitten by rat)?)
27. True or False: The probability of the mind reading mutation and probability of being bitten by a possum are independent events.
28. True or False: The probability of no mutant ability is dependent on being bitten by a flea.