In: Anatomy and Physiology
You have just sat through an informative lecture in your managerial accounting class about the net present value (NPV). However, one of your classmates leaned over to tell you that he is still unclear about this theory and would like for you to provide a summary of what this concept is all about and why it is so important. Explain to your classmate the key arguments for using NPV over other capital investment approaches and why it is the preferred method for making decisions about long-term investment opportunities.
In: Accounting
use your Sociological Imagination to answer, What would be your consequences for RPG and/or overpopulation in a group?
In: Economics
Further to the legalization of Cannabis in Canada, the Ontario Ministry of Transportation (OMT) is preparing an advertising campaign to discourage impaired driving due to the use of cannabis products. The campaign will target the most dangerous combinations of THC levels and time since last intake on driving competencies. As a recent Telfer graduate with a passion for statistics, you’ve been hired by the OMT to manage this project with the assistance of a research agency. You recruit 60 individuals and assign them randomly to 4 different treatment groups of interest. Subjects must consume a certain quantity of cannabis and then go to a virtual simulator room after a certain period of time to test their driving abilities on a scale totaling 30 points. Score data for the different treatment groups can be found in the data below at the end of the questions
a) This study consists of what kind of experiment? Describe its main components and explain how it differs from an observational study.
b)Make a side-by-side boxplot of the data and explain if the similar variance and the nearly normal conditions for conducting an ANOVA seem to be satisfied.
c) In addition to a side-by-side boxplot, what other graphs can you use to check if the assumptions/conditions for using an ANOVA are satisfied? (Note: you don’t need to produce these graphs; just explain how you would produce them.)
d)Calculate the sample variance for each treatment group and then use it to calculate the pooled variance manually. Check to see if your pooled variance agrees with the MSE displayed on the partial ANOVA table in part e) below.
e) Fill in manually the correct values for the missing values in the ANOVA table below. Show your computations (maximum of 2 decimal places).
|
ANOVA |
|||||
|
source of variation |
SS |
df |
MS |
F |
p-value |
|
Between Groups |
X |
3 |
X |
X |
X |
|
Within Groups |
X |
X |
10.47 |
||
|
Total |
786.18 |
59 |
f) Using the one-way ANOVA in e) above, test if there is a significant difference in the true mean score between the 4 treatment groups using the critical value approach and a 5% significance level. Make sure you follow all the steps for hypothesis testing indicated in the Instructions section, show your computations, and state the business significance of your conclusion.
g) Use the Bonferroni multiple comparison method to determine which population means differ at α = 0.05. Show your computations.
h) Perform a Kruskal-Wallis non-parametric test to determine whether there is a difference among the four-intake group (treatment group) scores. Use a 5% significance level and the critical value approach. You can use Excel or Minitab for your calculations but remember to show all the steps of your hypothesis test. Is your conclusion consistent with your results in f) above?
| Score on Driving Test after Intake (Max.30) | |||
| Intake/Treatment Groups | |||
| Light Dose-2 hours Wait | Light Dose-4 hours Wait | Heavy Dose- 2 hours Wait | Heavy Dose- 4 hours Wait |
| 28 | 27 | 27 | 24 |
| 30 | 27 | 25 | 24 |
| 26 | 27 | 23 | 24 |
| 23 | 25 | 19 | 23 |
| 23 | 29 | 21 | 21 |
| 20 | 24 | 23 | 19 |
| 26 | 30 | 23 | 21 |
| 25 | 28 | 19 | 25 |
| 24 | 29 | 23 | 23 |
| 19 | 20 | 18 | 14 |
| 22 | 21 | 15 | 17 |
| 25 | 22 | 21 | 20 |
| 24 | 24 | 19 | 20 |
| 22 | 23 | 17 | 24 |
| 20 | 22 | 15 | 25 |
In: Statistics and Probability
Analysis of daily output by a factory employee shows that, on average, the number of units per hour produced after t hours on the job can be modeled by y = 70t + 0.5t 2 − t 3 where 0 ≤ t ≤ 8.
(a) Thinking about the context of this problem, explain why t-values in this model might be restricted to values between t = 0 and t = 8.
(b) Find all the critical numbers for this function. Hint: You may want to use the quadratic formula or a quadratic program on your calculator as part of this calculation.
(c) Which critical number(s) that you found in part (b) make sense in this problem? Explain your reasoning in the context of this problem.
(d) For the critical number(s) you stated in part (c), explain, in the context of this problem, what this critical number tells you.
In: Math
In: Advanced Math
In: Math
Three-circle, red-on-white is one distinctive pattern painted on ceramic vessels of the Anasazi period found at the Wind Mountain archaeological site. At one excavation, a sample of 178 potsherds indicated that 70 were of the three-circle, red-on-white pattern. How many ceramic potsherds must be found and identified if we are to be 95% confident that the sample proportion p̂ of such potsherds is within 5.7% of the population proportion of three-circle, red-on-white patterns found at this excavation site? (Round your answer up to the nearest whole number.)
In: Statistics and Probability
What you know about writing for different audiences? How does your audience affect your writing? What should you consider when putting your text together? Write a 300 words essay.
In: Operations Management
LinkedIn Profile Assignment
What are your major fears/anxieties about your LI profile?
What are you most excited about as you think about improving your LI profile?
In: Psychology