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STAT 200 WEEK 1,2,3,4,5,6,7,8, MIDTERM EXAM & FINAL EXAM SOLUTIONS. {GRADED A}
STAT 200 WEEK 1,2,3,4,5,6,7,8, MIDTERM EXAM & FINAL EXAM SOLUTIONS. {GRADED A}
[Show more]STAT 200 WEEK 1,2,3,4,5,6,7,8, MIDTERM EXAM & FINAL EXAM SOLUTIONS. {GRADED A}
[Show more]1. (10 points) True or False. Justify your answers for full credit. 
(a) If all observations are identical in a data set, then the variance from this data set is zero. True: 
This is because the mean will be equal the values and no value will deviate from the mean. 
Therefore the variation or deviat...
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Add to cart1. (10 points) True or False. Justify your answers for full credit. 
(a) If all observations are identical in a data set, then the variance from this data set is zero. True: 
This is because the mean will be equal the values and no value will deviate from the mean. 
Therefore the variation or deviat...
2.2.2 
The median incomes of females in each state of the United States, including the District of 
Columbia and Puerto Rico, are given in table #2.2.10 ("Median income of," 2013). Create a 
frequency distribution, relative frequency distribution, and cumulative frequency distribution 
using 7 cla...
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Add to cart2.2.2 
The median incomes of females in each state of the United States, including the District of 
Columbia and Puerto Rico, are given in table #2.2.10 ("Median income of," 2013). Create a 
frequency distribution, relative frequency distribution, and cumulative frequency distribution 
using 7 cla...
Problem 9: Which of the box plots on the graph has a large positive skew? 
Which has a large negative skew? 
Box plot B has a large positive skew and box plot C has a large negative skew. 
Positive skews have a long tail going either right or up where a negative skew has 
a large tail going to the l...
Preview 1 out of 4 pages
Add to cartProblem 9: Which of the box plots on the graph has a large positive skew? 
Which has a large negative skew? 
Box plot B has a large positive skew and box plot C has a large negative skew. 
Positive skews have a long tail going either right or up where a negative skew has 
a large tail going to the l...
1. 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 speed limit? 
65−71 
8 
=−0.75 P = 22....
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Add to cart1. 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 speed limit? 
65−71 
8 
=−0.75 P = 22....
1. Why is a 99% confidence interval wider than a 95% confidence interval? 
99% confidence interval is only slightly wider. In order to have a higher 
degree of confidence you need to include a larger proportion of the 
population. 
2. A person claims to be able to predict the outcome of flipping a c...
Preview 2 out of 5 pages
Add to cart1. Why is a 99% confidence interval wider than a 95% confidence interval? 
99% confidence interval is only slightly wider. In order to have a higher 
degree of confidence you need to include a larger proportion of the 
population. 
2. A person claims to be able to predict the outcome of flipping a c...
1. 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? 
1% 
b. What is the probability that you will make a Type I error given that the null 
hypothesis is false? 
0% 
2. True/false: It is...
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Add to cart1. 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? 
1% 
b. What is the probability that you will make a Type I error given that the null 
hypothesis is false? 
0% 
2. True/false: It is...
Table #10.1.6 contains the value of the house and the amount of rental income in a year that 
the house brings in (“Capital and rental,” 2013). Create a scatter plot and find a regression 
equation between house value and rental income. Then use the regression equation to find the 
rental income...
Preview 2 out of 14 pages
Add to cartTable #10.1.6 contains the value of the house and the amount of rental income in a year that 
the house brings in (“Capital and rental,” 2013). Create a scatter plot and find a regression 
equation between house value and rental income. Then use the regression equation to find the 
rental income...
Question 1 (0.5 points) 
A team of cognitive psychologists studying the effects of sleep deprivation on short-term memory decay 
had eight participants stay in a sleep lab for two days. Four participants were randomly assigned to a 
condition in which they were not permitted to sleep during that per...
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Add to cartQuestion 1 (0.5 points) 
A team of cognitive psychologists studying the effects of sleep deprivation on short-term memory decay 
had eight participants stay in a sleep lab for two days. Four participants were randomly assigned to a 
condition in which they were not permitted to sleep during that per...
1.) A doctor wishes to estimate the mean triglyceride level of patients two hours after eating a 
steak dinner. To estimate the mean, you collect data from 22 patients. State the individual, 
variable, population, sample, parameter, and statistic. 
Individual: The triglyceride level of patients two ...
Preview 2 out of 6 pages
Add to cart1.) A doctor wishes to estimate the mean triglyceride level of patients two hours after eating a 
steak dinner. To estimate the mean, you collect data from 22 patients. State the individual, 
variable, population, sample, parameter, and statistic. 
Individual: The triglyceride level of patients two ...
Record your answers and work. 
Problem 
Number Solution 
1 
Answer: 
(a) (ii) Density of people per square kilometer 
(b) (i) All countries in the world 
Justification for (a) and (b): 
(a): A variable is the measurement or observation of the individual(s). 
(b): The population is the set of values ...
Preview 2 out of 11 pages
Add to cartRecord your answers and work. 
Problem 
Number Solution 
1 
Answer: 
(a) (ii) Density of people per square kilometer 
(b) (i) All countries in the world 
Justification for (a) and (b): 
(a): A variable is the measurement or observation of the individual(s). 
(b): The population is the set of values ...
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