What is the Mean no, of Calls (u)?
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A: a Solution
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Q: PA-(QVR)
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- If X∼U{1,2,…,20}, what is Var(3X−7)?An instructor was interested in how framing impacted her students' feelings about her grades. She randomly assiagned students to either receive positive ("This is an improvement") or negative ("You will still need to do a lot of work on this") feedback on an assignment. She further assigned students to a points lost (-10 points) or points gained (+90 condition) condition. After teach assignment was returned, she asked students to rate the fairness of their grades on a 10-point scale (0 = not fair at all, 10 = extremely fair). Points Lost Points Gained Mean Positive Feedback 7.8 7.9 7.85 Negative Feedback 4.3 5.5 4.9 Mean 6.05 6.7…✓ [Choose ] Categorical Binary Categorical Quantitative
- 150 students were polled. 75 of them are learning Hindi. 60 of them are learning Italian. 40 of them are learning neither Hindi nor Italian. How many of them are learning both Hindi and Italian? 4Q2. 600 people (250 less than or equal to 20 years old, and 350 greater than 20 years old) were asked, "Which take-out food do you prefer - Fried Chicker Burger or Chinese?" ≤20 > 20 Chicken 106 117 Burger 119 141 Chinese 25 92Evaluate the attached.
- Statistical decision theory is defined as the collection of techniques a decision maker can apply to choose the best alternative action. True or False True False < Prev 4 of 10 田 NeſmTo help plan the number of meals to be prepared in a college cafeteria, a survey was conducted, and the following data were obtained. 132 students ate breakfast.175 students ate lunch.270 students ate dinner.69 students ate breakfast and lunch.111 students ate breakfast and dinner.90 students ate lunch and dinner.53 students ate all three meals. How many students ate (a) At least one meal in the cafeteria?=__students(b) Exactly one meal in the cafeteria?=__studentsA forecaster used the regression equation Qt = a + bt+c₁D₁ + C2 D2 + c3 D3 and quarterly sales data for 2004/-2021/V(t = 1, ..., 64) for an appliance manufacturer to obtain the results shown below. Q is quarterly sales, and D₁, D2 and D3 are dummy variables for quarters I, II, and III. DEPENDENT VARIABLE: QT R-SQUARE F-RATIO P-VALUE ON F OBSERVATIONS: 64 0.8768 107.982 0.0001 VARIABLE INTERCEPT T D1 D2 D3 PARAMETER ESTIMATE 30.0 1.5 10.0 25.0 40.0 STANDARD ERROR 12.80 0.70 3.00 7.20 15.80 T-RATIO P-VALUE 2.34 0.0224 2.14 0.0362 3.33 0.0015 3.47 0.0010 2.53 0.0140 At the 5 percent level of significance, is there a statistically significant trend in sales?