The table below shows data collected on the vessel calls for a port in Ghana, from 2007-2016 to study the relationship between the number of Commercial Vessels (C.V.) and Offshore Vessels (O. V.). Year 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 C. V. (X) 527 486 481 558 623 611 606 543 615 673 O. V. (Y ) 67 129 475 719 1175 1053 758 844 910 928 Assuming a linear regression model E(Y |X = x) = α + β(x − x¯): a. Fit a regression model of the number of offshore vessels on commercial vessels, and give practical interpretation of the regression parameter estimates. [10 Marks] b. Construct a 95% confidence and prediction intervals for the number of offshore vessels corresponding to 742 commercial vessels.

Explain measures of interpretation in cohort studies, and provide at least one relevant example.

what is the difference between case control and cohort trial with examples for each trial?

1. When establishing your competence in your online communication, which of the following is most important?

   		What would be an acceptable level of expertise for journalistic or academic writing
   		What your audience believes makes for high competence
   		What you believe makes for a competent speaker
   		What other online influencers believe makes for a competent speaker

3 points   

QUESTION 38

1. What does your audience need to know about sources you use or cite in your online communication?

   		Name of the author, publisher, and year published
   		Name of the source and how you found the information
   		Author, title of the article or book, and year published
   		Name of the source and the source’s credibility

3 points   

QUESTION 39

1. If I say that eating a particular vegetable decreases your risk of cancer by 5%, which of the following is required to understand the actual percentage change in your risk?

   		Whether the risk has an estimated or unknown base.
   		Whether the percentage decrease is a relative or an absolute change.
   		Whether it is a rate or base formula percentage.
   		What the relative standard deviation is.

3 points   

QUESTION 40

1. What is the key element to a successful argument from example?

   		The audience must believe that the examples are representative of the larger group
   		Your examples must come from strong, reputable sources
   		That your examples are modern and not from before the invention of the internet
   		You must have randomly sampled your examples

Use the following information to create SQL commands to retrieve data from Henry Books database :

For each book, list the book code, book title, publisher code, and publisher name. Order the results by publisher name.
For each book published by Plume, list the book code, book title, and price.
List the book title, book code, and price of each book published by Plume that has a book price of at least $14.
List the book code, book title, and units on hand for each book in branch number 4.
List the book title for each book that has the type PSY and that is published by Jove Publications.
Find the book code and book title for each book located in branch number 2 and written by author 20.
Find the book title, author last name, and units on hand for each book in branch number 4.
Repeat Exercise 7, but this time list only paperback books.
Find the book code and book title for each book whose price is more than $10 or that was published in Boston.
Find the book code and book title for each book whose price is more than $10 and that was published in Boston.
Find the book code and book title for each book whose price is more than $10 but that was not published in Boston.

3. In ion mobility spectrometer, the ions are accelerated under a constant electric field in a cylindrical tube and the time of flight of the ions in this tube is measured. The ions are detected by using a sensor at the end of the tube. a) What type of sensor can be used to detect the ions? b) The experiment is performed at high frequencies to be able to decrease the effect of the noise. What type of noises can be present in this experiment?c) During the experiment, many devices are used together. What type of grounding can be used for this experimental setup to be able to prevent floating grounds and crosstalks? d)

The mobility of the ions is given as ? = ? ? 1 ? , where l, E and t are the length of the tube, the electric field strength and the time of flight, respectively. The data given in the table belongs to a specific type of spectrometer. By plotting this data, find the required length of the tube for an electric field strength of 10^4 V/cm.

Table 3:

Provide an answer for all of the shaded cells. Randomly sample 50% of cases from cohort study C and place them in the cells of Table 4 below. If the sample of cases (or controls) is random it will maintain the same ratio of exposed to unexposed among cases and non-cases that is present in cohort C. Next, determine how many controls will be required in table 4 in order to have 1 control for each case. There are two ways to sample the required number of controls from cohort C. First sample “controls 1” from all persons who entered the cohort (column 2 of Table 3), prior to knowledge of disease status. Then, sample “controls 2” from all persons who did not develop the disease during follow-up (Column 4 of Table 3). Although, it’s not realistic, retain two decimal places in the numbers of controls. As your samples of controls must also be random, they should also maintain the same ratio of exposed to unexposed that is present among potential controls in Cohort C. (Hint: When you are selecting your controls, the key wording in the question is "if the sample of cases (or controls) is random it will maintain the same ratio of exposed to unexposed among the cases and non-cases that is present in cohort C". This gives you the information to create the ratios required to sample your controls for both "Control 1" and "Control 2". When you are sampling those groups, make sure you maintain the same ratio of exposed and unexposed in your final Table 4 as what you observe in Table 3 for the column you are sampling from. )

Table 4:

Briefly state the primary problem that results from lack of randomization in an observational cohort study.

Define and relate these three terms. Cohort effect, Time of test effects and Age effects.

According to a recent study, 80% of American children (age 2 - 9) believe in Santa Claus. Suppose we obtain a random sample of 110 children in this age group and ask them whether or not they believe in Santa Claus. Answer the following:

1) Can the sampling distribution of ˆ p p ^ be approximated by the normal distribution? no yes

2) What is the mean of the distribution of ˆ p p ^ ?

3) What is the standard deviation of the distribution of ˆ p p ^ ?

4) What is the probability that fewer than 96 of the children from the sample will respond that they believe in Santa Claus?

(Round your answers to four decimal places when appropriate)