Question Suppose there is an increase in demand in U.S. produced automobiles in Europe. All else remaining equal, this should lead to which of the following? O A decrease in demand for Euros An increase in supply of U.S. dollars An increase in demand for U.S. dollars An increase in demand for Euros Suppose China reduces trade barriers that allow its citizens to import more products from Europe and with lower taxes / tariffs. As a result, The Chinese Yuan will depreciate against the Euro. the Euro will depreciate against the Chinese Yuan both the Euro and Chinese Yuan will appreciate relative to each other. the Chinese Yuan will appreciate against the Euro. Suppose incomes rise in the United States relative to Europe, and as a result, Americans demand more products produced in the United States and in Europe. As a result, the U.S. dollar will depreciate relative to the Euro. both the U.S. dollar and Euro will appreciate relative to each other. the U.S. / Euro exchange rate will not be affected. the Euro will depreciate relative to the U.S. dollar. If currency speculators decide that the value of the dollar should rise in the future relative to the yen, this will increase the demand for dollars and decrease the supply of dollars. True False

A heat pump has a COP that is 50% of the theoretical maximum. It maintains a house at 20◦C, which leaks energy of 0.6 kW per degree temperature difference to the ambient. For a maximum of 1.0 kW power input, find the minimum outside temperature for which the heat pump is a sufficient heat source.  

The store manager of a local supermarket is interesting in determining the relationship between the quantity of milk purchased by customers, measured in litres, and quantity of breakfast cereal, measured in kilograms. Using monthly data across all months in 2019 and 2020, the following model was estimated: Y = 8.77 + 0.98 X Error sum of squares: 325.5 Sum of squares of X: 915.4 Determine the upper limit for the 99% confidence interval for the slop correct to two decimal places.

5.4 Refer to Problem 4.16 on the four scales of the Myers-Briggs (MBTI) person- ality test. Table 5.10 shows the result of fitting a model using the four scales as predictors of whether a subject drinks alcohol frequently. a. Conduct a model goodness-of-fit test, and interpret. b. If you were to simplify the model by removing a predictor, which would you remove? Why? c. When six interaction terms are added, the deviance decreases to 3.74. Show how to test the hypothesis that none of the interaction terms are needed, and interpret. 11 11 Table 5.10. Output for Fitting Model to Myers-Briggs Personality Scales Data of Table 4.13 Criteria for Assessing Goodness of Fit Criterion DF Value Deviance 11.1491 Pearson chi-square 10.9756 Analysis of Parameter Estimates Standard Like-ratio 95% Chi- Parameter Estimate Error Conf. Limits Square Intercept -2.4668 0.2429 -2.9617 -2.0078 103.10 EI 0.5550 0.2170 0.1314 0.9843 6.54 SN -0.4292 0.2340 -0.8843 0.0353 3.36 TF t 0.6873 0.2206 0.2549 1.1219 9.71 JP j -0.2022 0.2266 -0.6477 0.2426 0.80 e S

please use R code 5.4 Refer to Problem 4.16 on the four scales of the Myers-Briggs (MBTI) person- ality test. Table 5.10 shows the result of fitting a model using the four scales as predictors of whether a subject drinks alcohol frequently. a. Conduct a model goodness-of-fit test, and interpret. b. If you were to simplify the model by removing a predictor, which would you remove? Why? c. When six interaction terms are added, the deviance decreases to 3.74. Show how to test the hypothesis that none of the interaction terms are needed, and interpret. Table 5.10. Output for Fitting Model to Myers-Briggs Personality Scales Data of Table 4.13 Criteria For Assessing Goodness of Fit DF Criterion Deviance Pearson Chi-Square 11 Value 11.1491 10.9756 11 Parameter Intercept EI Analysis of Parameter Estimates Standard Like-ratio 95% Estimate Error Conf. Limits -2.4668 0.2429 -2.9617 -2.0078 0.5550 0.2170 0.1314 0.9843 -0.4292 0.2340 -0.8843 0.0353 0.6873 0.2206 0.2549 1.1219 -0.2022 0.2266 -0.6477 0.2426 e Chi- Square 103.10 6.54 3.36 9.71 0.80 SN u. (D TF t j JP

data for the question EI SN TF JP smoke drink n e s t j 13 10 77 e s t p 11 8 42 e s f j 16 5 106 e s f p 19 7 79 e n t j 6 3 23 e n t p 4 2 18 e n f j 6 4 31 e n f p 23 15 80 i s t j 32 17 140 i s t p 9 3 52 i s f j 34 6 138 i s f p 29 4 106 i n t j 4 1 13 i n t p 9 5 35 i n f j 4 1 31 i n f p 22 6 79 Q.3 (10 points) Please download the dataset, ”MBTI.dat". The MBTI data file cross-classifies a sample of people from the MBTI Stp II National Sample on whether they report drinking alcohol frequently and on the four binary scales of the Myers-Briggs personality test: Extroversion/Introversion (E/T), Sens- ing/iNutitie (S/N), Thinking/Feeling (T/F) and Judging/Perceiving (J/P). The 16 predictor cominbations corresponding to the 16 personality type: ESTJ, ESTP, ESFJ, ESFP, ENTJ, ENTP, ENFJ, ENFP, ISTJ, ISTP, ISFJ, ISFP, INTJ, INTP, INFJ, INFP. (e.g., of the 77 people of type ESTJ, 13 reported smoking frequently.) Fit a moel using the four scales as predictors of the probability of drinking alcohol frequently. (a) (5 pts) Report the prediction equation, specifying how you set up the indicator variables. (b) (5 pts) Based on the model parameter estimates, explain which personality type has the highest esimated probability.

The cheapest economy tickets of Jetstar Airways (Australia) and Virgin Australia Airlines for domestic travel do not include checked baggage. Suppose that p1 and p2 are the population proportions of Jetstar and Virgin travellers, respectively, who will purchase checked baggage when they purchase the tickets. A Business analyst employed by a traveller magazine carries out a survey at the Sydney domestic airport. In a random sample of 200 Jetstar domestic travellers, 120 of them purchased checked baggage. In another independent random sample of 140 Virgin domestic travellers, 77 of them purchased checked baggage. Compute the upper 95% confidence bound for p2.