STAT 200 Week 7 Homework Assignment - SOLUTIONS
Illowsky Page 721 Question 24: An F statistic can have what values?
SOLUTION: F statistic is a RATIO (fraction) and is always positive.
Illowsky Page 713 Question 25: What happens to the curves as the d
MINITAB Assignment 2
b. The mean for this data is 66.85 in. The standard Deviation is 1.50 in. The median is 68.0 in
and the IQR is 7 in in height.
c. The best measure of the center and spread of this data is the: median and t
Getting Started In MINITAB Express
1. The following video is extremely helpful.
2. Open MINITAB Express
3. The following Screen Will appear
The output window where your
Topic 5: Summarizing Quantitative Data
Measure of center: mean, median
Mean vs. Median
Populations vs. Samples
We know all the data
Descriptive measures of populations are called parameters
Parameters are often written using Greek letters
Study Guide for Test 1: Topic 1- Topic 6
Know all definitions (All words and concepts highlighted and defined in PowerPoints).
Know the different types of variables
Know the definition of the population and sample
Know parameters define and are calculated
MINITAB Assignment 1
d. By looking at the pie chart in section A of this first question, 12% of the population from C1
were caps that were white.
e. 12% of the caps were white in the random sample from C6.
f. Yes my sa
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
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?
b. What is the probability that you will make a Type I error given that the null hypo
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
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
b. horizontal bar graph
Number of Students
Number of Students
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
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
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.
There are four problems (on four pages), the last one being actually a single question; the first
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,
a. Pie Chart
Eye Color of Students
b. Horizontal bar graph
Eye color of Students
Number of Students
c. Vertical Ba
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