Bob is considering an investment that can take one of four possible values, as described below: Calculate its expected value, carefully following all mathematical instructions. We'll reuse this information for the next two questions.
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Bob is considering an investment that can take one of four possible values, as described below:
Calculate its
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- QUESTION 1: Miss Basson is taking her Gr 10 class on an outing to the Zoo. She has a class of 35 learners of which only 92% can join the outing. She asks each learner to pay for their ticket of R145. Use the information above to answer the questions that follow. Ms Basson has compiled an Income and expense statement after the class outing to the zoo. The statement showed only the learners that went on the outing as well as Ms Basson. Income and Expenses Statement Expenses Bus hire Income Class ticket sales School contribution Total: R2500 A B Zoo Entrance ticket (for the group) Snack-pack Total: R1650 R2400 R2720 CCheck Yourself! Solve the given problem: 1. In an attempt to assess the effect of the length of time spent in using social media to the academic performance of the student, a survey was conducted to ten randomly selected students to determine the number of minutes per week using social media and their scores in a department examination in mathematic which consists of a 50-item test. The data are as follows: Minutes spent using social media per week (x) Score in the department exam (y) 30 45 45 48 60 120 180 200 240 300 320 400 a. Compute for the correlation coefficient r. b. Compute for the value of m and b. c. Form the regression equation 42 40 38 43 20 29 35 15Mrs. Harris is studying whether eating breakfast the day of an achievement test produces higher test scores in her 6th grade classroom. The data is shown in the tables below.Achievement Test Scores: No Breakfast Student Score Student A 248 Student B 277 Student C 245 Student D 256 Student E 255 Student F 279 Student G 281 Student H 265 Achievement Test Scores: After Eating Breakfast Student Score Student J 271 Student K 244 Student L 280 Student M 284 Student N 259 Student P 267 Student R 258 Student S 275 Identify the important pieces of information needed to decide if there is a statistically significant difference in the data sets (null hypothesis, alternative hypothesis, one- or two- tailed test, sample size for each group). a The null hypothesis is eating breakfast before an achievement test has no effect on test scores.The alternative hypothesis is eating breakfast before an achievement test produces higher test…
- Please helpSally wants to increase the number of cherry tomatoes on her tomato plants. The average number of tomatoes on each plant is 60. She knows that the heritability of tomato number is 0.25. She selects for plants that produce 100 tomatoes. The expected average number of tomatoes on the resulting plants is: 85 80 75 90 70A weight-loss counselor has prepared a program of diet and exercise for a client that gives the following expected weight loss (in pounds per week), where c is the average daily calorie intake and n is the number of 40-minute aerobic workouts per week. 1 4847 Weight loss = f(n,c) = 20 C+ 5 20 a. How many pounds can the client expect to lose by eating an average of 1200 calories per day and participating in three 40-minute workouts in a week? The client can expect to lose pounds in a week. (Simplify your answer.)
- Complete the following statements. In general, set lie at or below the median. % of the values in a data set lie at or % of the values in a data below the first quartile (Q1). If a sample consists of 1700 test scores, of them would be at or below the second quartile (Q2). If a sample consists of 1700 test scores, of them would be at or above the third quartile (Q3).lecture(12.9d): identify the following variables as categorical or numerical: (a) The age of children in months who have completed Peabody Vocabulary test. (b) The amount of time that children spent watching TV. (c) The type of program that children watch on TV.An analyst in the real estate business is interested in the relationship between the cost of the monthly rent of an apartment and the size of an apartment, in big cities. She gathers data for apartment buildings in 12 cities in 12 different states. In each city, she gets the numbers for at least 5 different buildings and at least 40 apartments in each building. She reaches the following conclusion: the rental cost of a 2-bedroom apartment is 50% more than the rental cost of a 1-bedroom apartment, and the rental cost of a 3-bedroom apartment is 50% more than the rental cost of a 2-bedroom apartment. Based on the paragraph, what is the minimum number of apartments she collected data on? Do you think her sample was large enough to be statistically valid? Based on the paragraph, are there any apartments or apartment buildings that she would have excluded from her study? Do you see any bias in how she selected apartments for her study? Based on the paragraph, is there a positive…
- College admissions For high school students graduatingin 2007, college admissions to the nation’s most selectiveschools were the most competitive in memory. (The NewYork Times, “A Great Year for Ivy League Schools, butNot So Good for Applicants to Them,” April 4, 2007).Harvard accepted about 9% of its applicants, Stanford10%, and Penn 16%. Jorge has applied to all three.Assuming that he’s a typical applicant, he figures that hischances of getting into both Harvard and Stanford mustbe about 0.9%.a) How has he arrived at this conclusion?b) What additional assumption is he making?c) Do you agree with his conclusion?Complete the following statements. In general, % of the values in a data set lie at or below the median. % of the values in a data set lie at or below the third quartile (Q3). If a sample consists of 900 test scores, quartile (Q2). If a sample consists of 900 test scores, quartile (Q1). of them would be ot or below the second of them would be ot or above the firstSelect the two different ways to state that the means of two populations are different.