For each of the following three population, indicate what the sampling distribution for samples of 25 would consist of:
a. Customer receipts for a supermarket for a year
b. Insurance payouts in a particular geographical area in a year.
c. Call center logs of inbound calls tracking handling time for a credit card company during the year
For each of the following substantive procedures, first note whether it is a test of details of transactions or a test of details of account balances. Then decide for which assertion the test provides the best evidence.1. Trace large cash receipts and payments to the source documents and the general ledger.2. Examine copies of note and bond agreements.3. Recompute accrued interest payable.4. Review debt activity for a few days before and after year-end to determine whether transactions are included in the proper period.5. Examine due dates on notes and bonds for proper classification between current and long term debt.
Procedure1. Trace large cashreceipts and paymentsto the sourcedocuments and thegeneral ledger.2. Examine copies ofnote and bondagreements.3. Recompute accruedinterest payable.4. Review…
For each of the two companies selected for your Portfolio Project Milestone, complete do the following:
Prepare a written report discussing each of the components above. Be sure to provide any supporting documents as addendums to your report and not in the body of the report.
Your report should meet the following criteria:
For each of the three writing prompts below, respond with about 110 – 170 words (about one paragraph each).
Prompt 1:
Some people believe that a coin is “due” to land heads up if it has just landed tails up three times in a row. Using the concept of independent events, explain why a fair coin is never “due” to land heads up.
Prompt 2:
Suppose two people are playing a card game. Each person is dealt five cards. After looking at their hands, each player is allowed to trade in three of their cards and get three new cards from the deck. Use the concept of conditional probability to explain why the probability of drawing and Ace has changed since before the initial hands were dealt. You may make up sample hands as part of your explanation.
Prompt 3:
Perform a quick search for survey results of anything you would like. Make sure the article or report contains some reference to a margin of error. Briefly describe the survey and the results. Then make a guess (or explain, if you know) at what it means to have this margin of error. Try to guess how the researchers could make the margin of error lower.
For each of the three writing prompts below, respond with about 110 – 170 words (about one paragraph each).
Prompt 1:
Suppose the average weekly study time for students at a college is 12.3 hours, with a standard deviation of 1.5 hours. Find:
a) The probability that a student chosen at random will have a study time of less than 12 hours.
b) The probability that the average study time of 20 randomly selected students is less than 12 hours.
Explain why the two probabilities are different.
Prompt 2:
Suppose you read a report that states, “65% of all homeowners are planning to make home improvements this year (margin of error is +/- 3%).” Answer these questions:
a) What is the confidence interval and how did you find it?
b) Suppose the confidence interval was found by using a 95% level of confidence. Would the margin of error increase or decrease if the level of confidence was increased. Why?
c) When conducting a survey, how can the study organizers decrease their margin of error without changing the standard 95% level of confidence? Hint: Look at the formula and see which values you can change to make the margin of error smaller.
Prompt 3:
Have you ever read about something being “statistically significant?” Write a paragraph about what you think it means, for example, to say something like, “there is a statistically significant difference between the number of bed pillows men have versus the number of pillows women have.”
For each of the situations described below, give an example (if it’s possible) or explain why it’s not possible.
(a) A set of vectors that is linearly dependent. After adding one more vector, the set becomes linearly independent.
(b) A set of vectors in R3 with the following properties (four possibilities):
For each case that is possible, how many vectors could be in the set? (State any constraints, as in “there must be at least…” or “at most…”)
(c) A system of equations with a unique solution. After adding another equation to the system, the new system has infinitely-many solutions.
(d) Vectors v1,v2,v3 ∈R3 that span R3 and satisfy 2v1 + 3v2 + 7v3 = 0
For each of the seven steps of information gathering steps state of the tool, utility, or command executed from Windows, Linux, or Mac and how does the tool, utility, or command obtain information from Windows, Linux, or Mac operating.150 words with referencessystem?
For each of the scenarios, in the activity below, decide:
1-whether the actions described violate the Bill of Rights
2-which Amendment is at issue
3-why the Amendment explains your answer
EXAMPLE:
QUESTIONS:
1-Scenario: Pedro was arrested and then beaten and tortured until he told the police where all of the stolen money was hidden.
Violation of the Bill of Rights?Which Amendment (1–10)? Reasoning:
2-Scenario: The police questioned Janice before she hired a lawyer and did not tell her she had the right not to say anything. She felt pressured and confessed to the crime.
Violation of the Bill of Rights?Which Amendment (1–10)? Reasoning:
3-Scenario: Larry was put on trial for killing his neighbor. The jury found him not guilty. After the trial, Larry was at the bar and bragged to a few people that he had “beat the system.” The next day the police charged him again and put him on trial.
Violation of the Bill of Rights?Which Amendment (1–10)? Reasoning:
4-Scenario: In one town, it is against the law to chew gum in public. Jessica was found chewing gum in public. The police arrested her. The judge set the bail and $1 million dollars.
Violation of the Bill of Rights?Which Amendment (1–10)? Reasoning:
5-Scenario: Congress makes a new law banning the ownership of guns for personal use.
Violation of the Bill of Rights?Which Amendment (1–10)? Reasoning:
6-Scenario: A city makes a law that does not allow the building of any churches within city limits.
Violation of the Bill of Rights?Which Amendment (1–10)? Reasoning:
7-Scenario: Dave has been awaiting his trial for ten years in a jail cell.
Violation of the Bill of Rights?Which Amendment (1–10)? Reasoning:
Please answer all questions in YOUR OWN WORDS. Thank You. 🙂
For each problem, include the relevant SAS output by copying and pasting it into your WORD document before you convert it to a .PDF.
For each hypothesis test, state the null and alternative hypotheses and give the significance level, value of the test statistic, and p-value. State whether you would reject or fail to reject the null hypothesis and give a conclusion in “layman’s terms,” i.e., use wording that would be understandable to someone who does not know any statistical jargon.
For any hand calculations, be sure to show how you got your answer; otherwise, we will not be able to give you partial credit if you get the final answer wrong.
1. Consider Exercise 22, p. 207, of our textbook. Using the data given in this exercise, use SAS Studio to answer each of the following questions. The data can be found in hwk3p1 in your MYDATA library. Assume that pH level is normally distributed.
a. A salivary pH of 7.4 or more is considered “normal.” pH levels smaller than this can lead to increased risk of cavities (dental caries). Let µA and µB denote the true population mean pH of caries-free 7th graders (Group A) and caries-prone 7th graders (Group B), respectively. Test the following hypotheses:
i. H0: µA ≥ 7.4 vs. HA: µA < 7.4
ii. H0: µB ≥ 7.4 vs. HA: µB < 7.4.
b. Find and interpret a 95% confidence interval for both µA and µB. Use these confidence intervals to test the null hypotheses H0: µA = 7.4 and H0: µB = 7.4.
c. Use a two-sample t-test to test the following hypotheses:
H0: µA = µB vs. HA: µA = µB
d. Find and interpret a 95% confidence interval for µA – µB. Use this confidence interval to test the null hypothesis in part c. above.
_________________________________________________________________________________________________________________________________________
MUST INCLUDE SCREENSHOTS FROM SAS AND any hand calculations WITH WORK SHOWN
DATA SET:
From book:
Determinations of saliva pH levels were made in two independent Random Samples of seventh-grade schoolchildren. Sample A children were caries free while sample B children had a high incidence of caries. The results were as follows:
A 7.14, 7.11, 7.61, 7.98, 7.21, 7.16, 7.89, 7.24, 7.86, 7.47, 7.82, 7.37, 7.66, 7.62, 7.65
B 7.36, 7.04, 7.19, 7.41, 7.10, 7.15, 7.36, 7.57, 7.64, 7.00, 7.25, 7.19
For each price in the following table, calculate the firm’s optimal quantity of units to produce, and determine the profit or loss if it produces at that quantity, using the data from the previous graph to identify its total variable cost. Assume that if the firm is indifferent between producing and shutting down, it will produce. (Hint: You can select the purple points [diamond symbols] on the previous graph to see precise information on average variable cost.)
Journal ClubDecember 2014Brought to you by the AOCPMR Student CouncilArticle title: PRP for the Treatment of Patellar TendinopathyAuthors: JasonL. Dragoo, Amy S Wasterlain, Hailiary Braun,…
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