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a. Hi, can someone pls help me with this asap?! The academic obtained a new sample (Sample B) and fitted a second regression model. The
a. Hi, can someone pls help me with this asap?!
The academic obtained a new sample (Sample B) and fitted a second regression model. The ANOVA table and the regression results are shown below. ANOVA df SS MS F Significance F Regression 1 0.415 0.415 11.197 0.002 Residual 38 1.445 0.037 Total 39 1.86 Regression results on Sample B Coefficients Standard Error t Stat P-value Lower 95% Upper 95% Intercept 0.487 0.081 5.979 0.000 0.322 0.652 international co-publication rate 0.461 0.138 3.346 0.002 0.182 0.739 9. (2 marks) What is the coefficient of determination (R') of the regression model for Sample B? (3dp) (Hint: Enter your answer as a decimal, such as 0.01) 10. (1 mark) Which sample (Sample A versus Sample B) has a better model fit? A. Sample A B. Sample B C. Neither Sample A nor Sample B D. Insufficient information to make a decisionThe COVlD19 pandemic accelerated the shift from cash to cards. The use of contactless payments also increased sharply in 2020, and lockdowns boosted the growth of e-commerce. Australian Beaurea of Statistics (ABS) claims that 27.5% of Australian consumers used Paypal when shopping online, and 57.7% of Australians used Amazon pay, with the remainder of Australians using Credit or Debit cards. When randomly surveying 180 Australian online shoppers, 22 reported using Paypal, 58 said using Amazon pay, while lOO used either a Credit or a Debit card. The observed and expected data are summarised in the table below: Online payment methods Observed Expected (O E) "ZIE Paypal 22 49.5 M\" Amazon pay 58 W\" 20.25 Credit/Debit cards 100 26.64 202015 Use the above information to answer the following questions by choosing the most correct option or typing the answer. i. (l mark] What is the expected value for Australians who use Amazon pay? (dej 2. (l mark] What is the contribution to chirsquared for Paypal? (Sdp) 3. (l mark] What is the chiesquared test statistic? (de) 4 (2 marks) Using Excel to find the pevalue assoCiated with the chiesquared test, what is your concluSion about the ABS's claim? A c A. Yes, we reject the null hypothesis, and all proportions are different to what ABS has stated. B. No, we do not reject the null hypothesis. C. Yes, we reject the null hypothesis, and at least one of the proportions is different to what ABS has stated. Now, we are interested in Amazon payers versus non-Amazon payers. Research Question: Is the proportion of Amazon payers different from the ABS's claim of 0.577? (Hint: To answer this research question. you may need to conduct a different hypothesis test) 5. (l mark] What is the absolute value of the test statistic? (3dp) 6. [l mark] Is it reasonable to conclude that the proportion of Amazon payers is significantly different to 0.577? 0 A. Yes, we can conclude that the proportion of Amazon payers is significantly different, and specifically the proportion is likely to be higher. B. Yes, we can conclude that the proportion of Amazon payers is significantly different, and specifically the proportion is likely to be lower. C. No, we cannot conclude that the proportion of Amazon payers is significantly differentStep by Step Solution
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