# Statistics

## How Research uses Hypothesis Testing | Instant Homework Help

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.

## Specifications on A Warranty | Instant Homework Help

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.

## Relationship Existing between Level of Income and Job Satisfaction | Instant Homework Help

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.

## Medical Malpractice Lawsuits | Instant Homework Help

@ 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.)

## Probability | Instant Homework Help

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)

## Confidence Interval for The Proportion | Instant Homework Help

(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:

## Constructing a Confidence Interval | Instant Homework Help

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.

## Area Statistics | Instant Homework Help

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.

## Transit Statistics | Instant Homework Help

The regional transit authority for a major metropolitan area wants to determine whether there is any relationship between the age of a bus and the annual maintenance cost. A sample of 10 buses resulted in the following data. Click onthe datafile logo to reference the data.DATA fileAge of Bus (years)Maintenance Cost ($)VIVAAWNNNN-350370480520590550750800790950a. Develop the least squares estimated regression equation (to 4 decimals, if necessary).y =220132 Ageb. Test to see whether the two variables are significantly related with a = .05.Reject null hypothesisc. Did the least squares line provide a good fit to the observed data?Yesd. Develop a 95% prediction interval for the maintenance cost for a specific bus that is 4 years old (to 1 decimal).3.5to682X

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