Statistics

Provide two different examples of how research uses hypothesis testing, and describe the criteria for rejecting the null hypothesis. Discuss why this is important in your practice and with patient interactions.

Discussion: Sampling and Collecting Quantitative and Qualitative Data
It is often not possible or practical to study an entire population, so researchers draw samples from which they make inferences about a population of interest. In quantitative research, where generalization to a population is typically valued, a researcher’s ability to make such inferences is only as good as the sampling strategy she or he uses to obtain the sample. Once an appropriate sample has been obtained, data collection should involve valid and reliable measures to ensure confidence in the results, as well as the ability to generalize the research outcomes. Although generalization is typically not a goal in qualitative research, sampling is just as important in qualitative and mixed methods research, as is obtaining reliable and valid results. Indeed, for quantitative, qualitative, and mixed methods research, sampling strategies and accurate data collection methods are critical aspects of the research process.

Specific methods of data collection (e.g., surveys, interviews, observations) produce specific types of data that will answer particular research questions, but not others; so here too, as covered in previous weeks, the research questions inform how the data will be obtained. Furthermore, the method used to collect the data may impact the reliability and the validity of that data.

For this Discussion, you will first consider sampling strategies. Then, you will turn your attention to data collection methods, including their strengths, limitations, and ethical implications. Last, you will consider measurement reliability and validity in the context of your discipline.

With these thoughts in mind, if your last name starts with A through L, use Position A. If your last name starts with M through Z, use Position B.

Position A: Probability sampling represents the best strategy for selecting research participants.

Position B: Nonprobability (or purposive) sampling represents the best strategy for selecting research participants.

By Day 4
Post a restatement of your assigned position on sampling strategies. Explain why this position is the best strategy for selecting research participants. Support your explanation with an example and support from the scholarly literature. Next, select a data collection method (e.g., surveys, interviews, observations) and briefly explain at least one strength and at least one limitation. Then, identify a potential ethical issue with this method and describe a strategy to address it. Last, explain the relationship between measurement reliability and measurement validity using an example from your discipline.

Be sure to support your Main Issue Post and Response Post with reference to the week’s Learning Resources and other scholarly evidence in APA Style.

Read a selection of your classmates’ postings.

By Day 6
Respond to two classmate who was assigned the opposite position by further supporting or respectfully countering his or her position.

The question to address is: “What have you learned about statistics?” In developing your responses, consider—at a minimum—and discuss the application of each of the course elements in analyzing and making decisions about data (counts and/or measurements).

In your paper,

Discuss the following course elements:
Descriptive statistics
Inferential statistics
Hypothesis development and testing
Selection of appropriate statistical tests
Evaluating statistical results.
The Final Paper

Must be three to five double-spaced pages in length (not including title and references pages) and formatted according to APA style.
Must include a separate title page with the following:
Title of paper
Student’s name
Course name and number
Instructor’s name
Date submitted
Must begin with an introductory paragraph that has a succinct thesis statement.
Must address the topic of the paper with critical thought.
Must end with a conclusion that reaffirms your thesis.
Must use at least three scholarly sources in addition to the course text.

a) Check the conditions for constructing a confidence interval. Select all necessary conditions that have the appropriate explanation below.A. Randomization Condition: This condition is not satisfied because the samples were drawn from a convenience sample.B. Success/Failure Condition: This condition is satisfied because there were more than 10 successes and failures.C. Randomization Condition: This condition is satisfied because there is nothing to indicate that the samples were not drawn randomly.D. 10% Condition: This condition is satisfied because 2300 men are less than 10% of the population of men.E. Success/Failure Condition: This condition is not satisfied because there were fewer than either 10 successes or failures.OF. Nearly Normal Condition: This condition is not satisfied because it is highly unlikely that the population of men is Normal.G. Nearly Normal Condition: This condition is satisfied because there is nothing to indicate that the underlying population is not Normal.H. 10% Condition: This condition is not satisfied because 2300 men are more than 10% of the population of men.

MotoWin Auto Superstore is thinking about offering a two-year limited warranty for $952 on all new cars of a certain model. The terms of the warranty would be that MotoWin would replace the car free of charge under certain, specified conditions. Replacing the car in this way would cost MotoWin $13,600. Suppose that under the warranty, there is a 7% chance that MotoWin would have to replace the car one time and a 93% chance they wouldn’t have to replace the car.If MotoWin knows that it will sell many of these warranties, should it expect to make or lose money from offering them? How much?To answer, take into account the price of the warranty and the expected value of the cost from replacing the car.Motown can expect to make money from offering these warranties.In the long run, they should expect to makedollars on each warranty sold.MotoWin can expect to lose money from offering these warranties.In the long run, they should expect to losedollars on each warranty sold.MotoWin should expect to neither make nor lose money from offering these warranties.

John registered for three subjects in this trimester, including Mathematics,History and Economics. He personally feels that the probability for him to pass the Mathematics test (M) is 0.9, History test (H) is 0.6, and Economics (E) test is 0.8 respectively. Assume that the probability he would pass in his test isindependent to each other. (i) Find the probability of John failed in all the tests. (3 marks) (ii) What is the probability that John passed in the Mathematics or Historytest? (3 marks)

(2 points) Over half of all American teens (ages 12 to 17 years) have an online profile, mainly on Facebook. A random sample of 513 teens with profiles found that 404 included photos of themselves. (a) Give the 90% large-sample confidence interval for the proportion p of all teens with profiles who include photos of themselves. Large-sample Interval: to (b) Give the plus four 90% confidence interval for p . (The plus-four interval always pulls the results away from 0% or100%, whichever is closer. Even though the condition for using the large-sample interval is met, the plus four intervals more trustworthy.) Plus four Interval: to l:

A correlation test was conducted to determine whether a relationship exists between level of income and job satisfaction. The sample consisted of 432 employees equally represented across public, private,and non-profit sectors. The results of the test demonstrate a strong positive correlation between the two variables,r=.87, p<.01, showing that as level of income increases, job satisfaction increases as well.

@ 8..214-T mQuestion Help a In a study of 784 randomly selected medical malpractice lawsuits, it was found that 471 of them were dropped or dismissed. Use a 0.05 signi?cance level to test the claim that most medicalmalpractice lawsuits are dropped or dismissed. Which of the following is the hypothesis test to be conducted? A. H0_p=0.5 4’3. H0_p=0.5H1:p¢0.5 H1:p>0.5C. H0:p¢0.5 D. H0_p=0.5H1:p=0.5 H1:p<0.5E. Ho:p>0.5 F. H0:p<0.5H1:p=0.5 H1_p=0.5 What is the test statistic? z :(Round to two decimal places as needed.)

Subject Area Statistics Assignment.Urgency: 12 to 24 hours. required Wordcount:  2 to 3 pages.citation Style: APA Style. Details: what you have learned in this course by gathering data and running a statistical analysis. To study the relationship between height and the weight, you need to collect a sample of nine (9) people using a systematic sampling method. What is the population of people? Where and how are you going to collect your sample? Does your sample accurately represent your population? Why or why not? Collect the sample and record the data. (CLO 1) Construct a confidence interval to estimate the mean height and the mean weight by completing the following: Find the sample mean and the sample standard deviation of the height. Find the sample mean and the sample standard deviation of the weight. Construct and interpret a confidence interval to estimate the mean height. Construct and interpret a confidence interval to estimate the mean weight. (CLO 2) Test a claim that the mean height of people you know is not equal to 64 inches using the p-value method or the traditional method by completing the following: State H0 and H1. Find the p-value or critical value(s). Draw a conclusion in the context of the situation. (CLO 3) Create a scatterplot with the height on the x-axis and the weight on the y-axis. Find the correlation coefficient between the height and the weight. What does the correlation coefficient tell you about your data? Construct the equation of the regression line and use it to predict the weight of a person who is 68 inches tall. Write a paragraph or two about what you have learned from this process. When you read, see, or hear a statistic in the future, what skills will you apply to know whether you can trust the result?  I Will attach the Assignment file.