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- Research Question 2: For patients recovering from Alcohol Use Disorder, are therapist-led follow up sessions (TFS) more effective in preventing relapse than Alcoholics Anonymous meetings (AA)? State the alternative hypothesis for this study.Short answer type questions. (a) A generic brand of the anti-histamine Diphenhydramine markets a capsule witha 50 milligram dose. The manufacturer is worried that the machine that fills thecapsules has come out of calibration and is no longer creating capsules with theappropriate dosage. Research Question: Does the data suggest that the populationmean dosage of this brand is different than 50 mg?Is this a one-tail test or two tail test? If one tail, state if it is right tail or left tail. (b) After receiving complaints from McDonald’s customers in Japan about the amountof french fries being served, the on-line news magazine ”Rocket News” decided totest the actual of the fries served at a particular Japanese McDonald’s restaurant. According to the Rocket News article, the official weight standard set by McDonald’sof Japan is for a medium sized fries to weigh 120 grams. The publication weighedthe fries from 25 different medium fries they purchased and found the average weightof the fries…Chapter 5, Section 1, Exercise 018 MORE BENEFITS OF EATING ORGANICUsing specific data, we find a significant difference in the proportion of fruit flies surviving after 13 days between those eating organic potatoes and those eating conventional (not organic) potatoes. This exercise asks you to conduct a hypothesis test using additional data. In this case, we are testing H0 : po= pcHa: po > pc where po and pc represent the proportion of fruit flies alive at the end of the given time frame of those eating organic food and those eating conventional food, respectively. Use a 5% significance level.Effect of Organic Soybeans After 5 DaysAfter 5 days, the proportion of fruit flies eating organic soybeans still alive is 0.92, while the proportion still alive eating conventional soybeans is 0.84. The standard error for the difference in proportions is 0.023.What is the value of the test statistic?Round your answer to two decimal places. z= What is the p-value?Round your answer to…
- a) If the prevalence rate is 50%, the sensitivity is 85%, and the specificity is 90%, what will the PPV value be? b) What are possible slider values that will produce a PPV value of 1? c) What are possible slider valuse that will produce an NPV value of 1? d) If sensitivity and specificity remain constant while prevalence decreases, what effect does that have on the PPV? e) If prevalence and specificity remain constant while sensitivity increases, what effect does that have on the NPV?Chapter 5, Section 1, Exercise 019 MORE BENEFITS OF EATING ORGANICUsing specific data, we find a significant difference in the proportion of fruit flies surviving after 13 days between those eating organic potatoes and those eating conventional (not organic) potatoes. This exercise asks you to conduct a hypothesis test using additional data. In this case, we are testing H0 : po= pcHa: po > pc where po and pc represent the proportion of fruit flies alive at the end of the given time frame of those eating organic food and those eating conventional food, respectively. Use a 5% significance level.Effect of Organic Bananas After 25 DaysAfter 25 days, the proportion of fruit flies eating organic bananas still alive is 0.42, while the proportion still alive eating conventional bananas is 0.40. The standard error for the difference in proportions is 0.029.What is the value of the test statistic?Round your answer to two decimal places. z= What is the p-value?Round your answer to…What is the consequence of a Type II error? Question 40 options: Concluding that a treatment has an effect when it really does Concluding that a treatment has no effect when it really has no effect Concluding that a treatment has no effect when it really does Concluding that a treatment has an effect when it really has no effect
- Question 3 A researcher is proposing that exercise makes a person moreenergized as a result they require less sleep. He carries out a surveyon the number of hours of exercise per week and the average hoursof sleep needed per night in order to feel well-rested. The results areshown below for the 8 participants.Hours of exercise/week 4 5.2 2 3.4 8 10 1.5 6Average hours of sleepneeded/night8.6 8.1 9 8.5 7.4 6.8 9.4 7.7�� Calculate and interpret the regression line for the data.Altman Z Score 2018 2019 2020 BHP 0.80 0.71 0.63 FMG 1.12 1.26 1.38 RIO 1.36 1.34 1.34 Comment on the findings of each company and is it useful in predicting financial failureIf the least-squares regression line for predicting y from x is y = 1500 – 2.5x, what is the predicted value of y when x = 10? A. -1000 B. 1475 C. 1250 D. 596 E. 4800
- Question 21 Which of the following is a false statement? A) Since univariate models typically leave out lots of important RHS variables, we expect to have non-zero residuals B) A univariate regression model basically can’t be used to establish causality C) It’s always fine to assume linearity D) All of the above are correct statementsAnswer quickly please. Need answer ASAP. In a winter of an epidemic fu, the parents of 2000 babies were surveyed by researchers at a well-known pharmaceutical company to determine if the company's new medicine was effective after two days. Among 120 babies who had the fu and were given the medicine, 29 were cured within two days. Among 280 babies who had the flu but were not given the medicine, 56 recovered within two days. Is there any significant indication that supports the company's claim of the effectiveness of the medicine? Use α = 0.01Please 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
