In a criminal trial where the null hypothesis is innocence, a Type I error is made when: A. a guilty defendant is acquitted B. an innocent person is acquitted C. a guilty defendant is convicted D. an innocent person is convicted
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Please answer the following multiple choice question :) (All subparts are part of one question)
a) In a criminal trial where the null hypothesis is innocence, a Type I error is made when:
A. a guilty defendant is acquitted
B. an innocent person is acquitted
C. a guilty defendant is convicted
D. an innocent person is convicted
b) Two multiple regression models,Model 1 and Model 2, are built from the same training data with one less predictor in Model 2, which of the following is always true?
A. Model 1 has greater adjusted R2
B. Model 2 has greater adjusted R2
C. Model 1 has greater R2
D. Model 2 has greater R2
c) In testing the validity of a multiple regression model, a large value of the F test statistic indicates that:
A. most of the variation in the independent variables is explained by the variation in y
B. most of the variation in y is unexplained
C. most of the variation in y is explained by the regression equation
D. the model provides a poor fit
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- determine the following statement is a valid reason for using nonparametric methods? - We are reluctant to assume strong conditions on the data. (True or False)A researcher is interested in determining if there's a difference in body fat percentage between athletes who had a high protein diet compared to those who had low protein diet. Use the output to answer the following questions and then write an APA Results section. 1. What type of data is the dependent variable? _________________ 2. What type of design is being used? _______________________ 3. Is this a one or two tailed hypothesis? ___________________ 4. What type of inferential statistic is appropriate? _____________________ Group Statistics Protein Body Fat % Mean Std. Deviation High 10.25 3.33 Low 16.12 4.25 tobt= 6.23 df=18 p=.000 Write the APA results section:When results are not statistically significant, why do you conclude that it is plausible that the two variables are independent rather than concluding that the variables are different independent?
- . The term sample usually refers to a sample that ___ - Consists of people with chemical dependency problems - Uses the same group of individuals with a before/after measurement - Requires a dependent variable for hypothesis testing - Is randomly selected from two dependent populationsIn order to determine a realistic price for a new product that a company wants to market the company’s research department selected 10 sites thought to have essentially identical sales potential and offered the product in each at a different price. The resulting sales are recorded in the accompanying table: Price ($) Sales ($1,000s) 15.00 15 15.50 14 16.00 16 16.50 9 17.00 12 17.50 10 18.00 8 18.50 9 19.00 6 19.50 5 c). Find the equation of the sample regression line using Minitab. d). Interpret the meaning of the coefficients of the equation of the sample regression line.In a study attempting to replicate findings by Stephens, Atkins, & Kingston (2009), each participant was asked to plunge a hand into the icy water and keep it there as long as the pain would allow. In one condition, the participants repeated their favorite curse words while their hands were in the water. In the other condition, they repeated neutral words. The original research showed that, in addition to lowering the participants’ perception of pain, swearing also increased the amount of time they were able to tolerate the pain. Data similar to the results obtained in the study are shown in the following table: _____________Amount of Time (in Seconds)_ Participant Swear Words Neutral Words 1 94 59 2 70 61 3 52 47 4…
- In a study attempting to replicate findings by Stephens, Atkins, & Kingston (2009), each participant was asked to plunge a hand into the icy water and keep it there as long as the pain would allow. In one condition, the participants repeated their favorite curse words while their hands were in the water. In the other condition, they repeated neutral words. The original research showed that, in addition to lowering the participants’ perception of pain, swearing also increased the amount of time they were able to tolerate the pain. Data similar to the results obtained in the study are shown in the following table: _____________Amount of Time (in Seconds)_ Participant Swear Words Neutral Words 1 94 59 2 70 61 3 52 47 4…Question 1For the following scenarios provide the following for each scenario:• the null and alternative hypotheses• explain whether the hypothesis test is left-tailed, right-tailed, or two-tailed, • explain how you should interpret a decision that rejects the null hypothesis, and • explain how you should interpret a decision that fails to reject the null hypothesis. a. A Don Anderson Poll reports that on average 70% of Jamaicans believe that electricitybills are too high. b. Sunshine Cooperation guarantees that the mean shelf life of cornflakes is at least 750 days. c. Consumer Affairs has advised that the standard deviation of the fuel economies of its Honda Civics for 2016 is no more than 10.7 miles per gallon.d. A meal supplement provider claims that the average difference in calories between two brands is 55.1. A type of decision making under uncertainty where the decision maker is optimistic and chooses the alternative with the maximum output. 2. A good regression model should have Select one: a. a high r2 and a high significance level for the F test. b. a low r2 and a high significance level for the F test. c. a high r2 and a low significance level for the F test. d. a low r2 and a low significance level for the F test. 3. Which of the following is an example of Mutually Exclusive events? Select one: a. IN tossing a die, getting a prime number or an odd number. b. IN tossing a die, getting an even number or an odd number.
- Did the ductility of the wire change after soaking it to an acid solution? Infer from the data below: Ductility before soaking Ductility after soaking 2563 2405 2564 2406 2565 2407 2566 2408 2567 2409 2452 2693 2453 2694 2454 2695 2455 2696 2456 2697 2634 2589 2635 2590 2636 2591 2637 2592 1.) Create a null and alternative hypothesis 2.) Is there a significant change before and after soaking? Prove it using computationsA researcher is interested in examining whether doctors are as accurate at diagnosing certain illnesses via telehealth as they are in person. She randomly assigns a sample of doctors to either see patients via telehealth or in person, and assesses their diagnostic accuracy. What is the null hypothesis for scenario 2? A) H0: µ(telehealth) = µ(in person) =µ(control) B)Ho:μtelehealth=X¯in−person C)H0: rxy = 0 D)H0:µTelehealth =µIn-Person"In your response indicate whether CPAs in states that have flat state income tax rates work fewer hours per week during tax season compared to the US average. You will want to formally set up H0 and Ha, report either the test statistic (z-value) or p-value, and explain why you either reject or fail to reject your null hypothesis."