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- What is the class mark for a class interval of 19.50—22.50?27. An enquiry into the budgetk of the middle class families in Mumbai gave the following information : Fuel 10% Misc. 20%· Еxpenditure Price (2002) Rs. Price (2003) Rs. Food 35% Rent 15% Clothing 20% 100 20 60 150 50 174 60 125 25 90 The cost of living index in 2003 is : (A) 116.10 (В) 126.10 (C) 136.10 (D) 146.10.sam is willing to spend up to $10 to buy a raffle ticket with 0.5% chance of winning prize worth $1000, what is sam 's implied certainty equivalent adjustment for ? would he be willing to pay $100 for a raffle ticket with 2% chance of winning $2000?
- Q# Defaulting on a loan means failing to pay it back on time. The default rate among X university students on their student loans is 6 %. As a project you develop a test to predict which students will default. Your test is good but not perfect. It gives 4% false positives, i.e. prediciting student will default who in fact will not. If has a 0% false negative rate, i.e. prediciting a student won't default who in fact will.a) Suppose a random student predicts positive. Report the probability that he will truly default.b) Someone offers to bet me the student in part(a) won't default. They want me to pay them Rs. 5k if the student doesn't default and they'll pay me Rs. 20k if the student does default. Is this a good bet for me to take?1st question According to a toy business, at least 80% of girls under the age of eight prefer dolls to other forms of toys. We believe that this allegation is exaggerated after observing the purchasing patterns of many girls under the age of eight. To disprove this notion, we study the purchasing patterns of 20 randomly selected girls under the age of eight, and we count X, the number of girls who purchase stuffed toys. We want to see if HO: p = 0.8 holds up against H1: p 0.8. Let's say we decide to accept HO if x> 12 (i.e. X 13). This suggests that if X 12 (I.e. X 13) is true, we will reject HO. a. Find the rejection region of the form a = 0.05 %3DGeorgeenjoys throwing horseshoes. Last week he tossed 150 shoes and obtained 36 ringers. (Ringers are good.) Next week he plans to throw 250 shoes. Assume that George’s tosses satisfy the assumptions of Bernoulli trials. (a) Calculate the point prediction of the number of ringers that George will obtain next week. (b) Calculate the 90% prediction interval for the number of ringers George will obtain next week. (c) It turns out that next week George obtains 62 ringers. Given this information, comment on your answers in parts (a) and (b).
- Aresearcher wishes to estimate the percentage of adults who support abolishing the penny. What size sample should be obtained if he wishes the estimate to be within 3 percentage points with 95% confidence if (a) he uses a previous estimate of 22% (b) he does not use any prior estimates? (Round up to the nearest integer.) (a) n (b) n Round up to the nearest integer.)The proportion of defective items is not allowed to be over 12%. A buyer wants to test whether the proportion of defectives in his shipment of 1000 items exceeds the allowable limit. The buyer takes a SRS of 100 items and finds that 19 are defective. State your conclusion Group of answer choices A. Evidence suggests the proportion of defectives exceeds the allowable limit. B. Inconclusive result. C. There is not enough evidence to suggest the proportion of defectives exceeds the allowable limit. D. Evidence suggests the proportion of defectives is significantly lower than the allowable limit.You have a big exam tomorrow. You were planning to study tonight, but your friend has ticketsto a concert and has invited you to join her. Youwould be willing to accept a B on the exam inorder to go to the concert. You estimate that if youdon’t study you have a 35 percent chance of scoring a 90, a 35 percent chance of scoring an 80 (thescore required to earn a B), a 25 percent chance ofearning a 75, and a 5 percent chance of earning a60. Will you go to the concert? Explain why or whynot.
- (a) Below is the extract of the first few questions in the questionnaire. Define the type of variable (Numerical Discrete / Numerical Continuous / Categorical Nominal / Categorical Ordinal) for each of the variables: Q1: Your studying program Circle your answer: Business / Engineering / Arts / Science) QII: Traveling time from home to college on 20 February 2022 (in minutes): QIII: Total spending on meal (breakfast + lunch + dinner) on 20 February 2022 (Circle your answer: Below $40 / $40 - less than $80 / $80 - less than $120 / $120 or above) QIV: Number of T-shirts you've bought in January 2022:21 The Ebola virus has an infection rate of 11% per day as compared to the SARS virus, which has a rate of 4% per day. If there were one case of Ebola and 30 cases of SARS initially reported to authorities and cases are reported each day, which statement is true? At day 10 and day 53 there are more Ebola cases. (2) At day 10 and day 53 there are more SARS cases. (3) At day 10 there are more SARS cases, but at day 53 there are more Ebola cases. (4) At day 10 there are more Ebola cases, but at day 53 there are more SARS cases.Is the following variable discrete or continuous: The number of times a coin must be flipped until the first Tails is observed. Is the following variable discrete or continuous: The number of questions asked during a 1-hour review session.