7. You flip a coin three times.
a. What is the probability of getting heads on only one of your flips?
=.5 * 10 =50%
b. What is the probability of getting heads on at least one flip?
1-(1/2)^3 = 7/8 = .875 * 100= 87.5%
27. A refrigerator contains 6 apple
Quiz 2
Each question is worth 1 point.
Dont leave anything blank. I can always find a way to give you some credit if youve made an
attempt. Be sure to post any questions you have after the answers open.
The work you turn in by 11:59 P.M. on Dec 4th must b
18. You choose an alpha level of .01 and then analyze your data.
a. What is the probability that you will make a Type I error given that the null hypothesis is true?
.01
b. What is the probability that you will make a Type I error given that the null hypo
Quiz 1
I know I dont need to remind anyone that UMUCs academic integrity policies. We are all
adults. We know that we shortchange only ourselves if we arent honest. This quiz needs to be
completed without help from others. The work submitted must be your
8. Assume the speed of vehicles along a stretch of I-10 has an approximately normal distribution with
a mean of 71 mph and a standard deviation of 8 mph.
a. The current speed limit is 65 mph. What is the proportion of vehicles less than or equal to the
sp
4. Why is a 99% confidence interval wider than a 95% confidence interval?
A 99% confidence interval is wider because the means extends further than 95% intervals. Meaning that
the person must be more accurate when they say they are 99% confident.
12. A pe
7. For the data from the 1977 Stat. and Biom. 200 class for eye color,
construct: number of students 26
a. pie graph
Eye Color
15%
3%
43%
39%
Brown
Blue
Green
Grey
b. horizontal bar graph
Number of Students
Grey
Green
Blue
Brown
0
2
4
6
Number of Students
Lane
3. If you are told only that you scored in the 80th percentile, do you know from that description
exactly how it was calculated? Explain.
I feel it would depend on which definition they were going with. Without any other information,
I would believe
Homework Assignments/ Week 2
Lane et al. Chapter 2/3
7. For the data from the 1977 Stat. and Biom. 200 class for eye color, construct:
A. pie graph
B. horizontal bar graph
C. vertical bar graph
D. a frequency table with the relative frequency of each eye
Homework Assignments/ Week 4
Lane et al. Chapter 7
8. Assume the speed of vehicles along a stretch of I-10 has an approximately normal
distribution with a mean of 71 mph and a standard deviation of 8 mph.
a. The current speed limit is 65 mph. What is the
Homework Assignments/ Week 3
Lane et al. Chap 5.
5. A fair coin is flipped 9 times. What is the probability of getting exactly 6 heads?
5. 6C9*(1/2 )^6*(1-1/2)^3 = 0.164 or 16.4% chance of getting exactly 6 heads.
7.You flip a coin three times. (a) What i
Daniel Colllazo
Lane et al
3. If you are told only that you scored in the 80th percentile, do you know from that description exactly
how it was calculated? Explain.
Only knowing that I scored in the 80th percentile doesnt give me enough information. I wou
1. A pollster selected 4 of 10 available people. How many different groups of 4 are
possible?
The number of different groups of 4 are possible = 10C4 = 210
2. Your firm has a contract to make 1000 staff uniforms for a fast food retailer. The
heights of th
STAT 200 QUIZ 1
NAME: _ _
I have completed this assignment myself, working independently and not consulting anyone
except the instructor.
INSTRUCTIONS
There are four problems (on four pages), the last one being actually a single question; the first
three
7. You flip a coin three times. (a) What is the probability of getting
heads on only one of your flips? 1/8 = 0.125
(b) What is the probability of getting heads on at least one flip?
1-1/8 = 7/8
27. A refrigerator contains 6 apples, 5 oranges, 10 bananas,
Week 2
7.
Eye
Color
Brown
Blue
Green
Gray
Number of
Students
11
10
4
1
a. Pie Chart
Eye Color of Students
Brown
Blue
Green
Gray
1
4
11
10
b. Horizontal bar graph
Eye color of Students
Gray
Green
Number of Students
Blue
Brown
0
2
4
6
8
10
12
c. Vertical Ba
Week 1
3. If you are told only that you scored in the 80th percentile, do you know from
that description exactly how it was calculated? Explain.
There are multiple ways to calculate a percentile. According to Lane, there are 3 ways to
calculate percentile