2. Calculate the quartile deviation and its co-efficient from the following data, С. .: 10-15 15-20 20-25 25-30 30-35 35-40 40-45 45-5) f. 4 12 16 22 10 8
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- Q2/ The number of hours worked by 10 employees of small building firm during a week were: 45 46 34 47 44 42 46 42 43 44 Calculate the mean, median and standard deviation of the hours worked by the employeesaaai 15 Concrete factory produces ten types of concrete products shown in the table below. if all types of concrete products have the same standard deviation, which type has the least ?relative variation Concrete 1. 2. 4 6. 7. 10 Products Мean 150 300 375 160 325 270 160 275 165 275 weight (KE) type 1 type 2 type 3 type 4 type 5 type 6 type 7 type 8 type 9 type 10The following data relate to marks in Advanced Accounts and Business Statistics in B.Com. (H.), Il yr Examination of a particular year in Delhi University : Mean Marks in Advanced Accounts Mean Marks in Business Statistics Standard Deviation of Marks in Advanced Accounts Standard Deviation of Marks in Business Statistics Coefficient of Correlation between the Marks in Advanced Accounts and Business Statistics Find the two regression lines and calculate the expected marks in Advanced Accounts if the marks secured by a student in Business Statistics are 40. = 30 = 35 = 10 = 7 = 0-8
- 9. Determines the average, median and standard deviation of each of the distributions to a variable (age, girl reaction time and boys reaction time).What interpretations can you make of it? B.) For each of the three two-variable distributions, make a graphical representation using a technological tool and calculate the values that can be used to interpret them. C.) Interpret graphic representations and draw conclusions.Q.4 Calculate the Variance and standard deviation from the following data Daily wages (Rs.) No. of workers 400-450 450-500 500-550 550-600 600-650 650-700 20 30 50 25 20 5Question (g) Compute the three quartiles and draw a box-whisker plot showing therequired calculations.(h) Compute the 29th percentile of the data and interpret its value.
- A math teacher claims that she has developed a review course that increases the scores of students on the math portion of a college entrance exam. Based on data from the administrator of the exam, scores are normally distributed with μ = 514. The teacher obtains a random sample of 1800 students, puts them through the review class, and finds that the mean math score of the 1800 students is 520 with a standard deviation of 112. Complete parts (a) through (d) below. to = 1.04 (Round to two decimal places as needed.) Find the P-value. The P-value is (Round to three decimal places as needed.)Premature-birth Risk Found Higher for Teens (reported in the Sacramento Bee, April 27, 1995, p. A7) The youngest girls [in the study], those aged 13 to 17, were 90 percent more likely than the women in their early 20's to deliver prematurely. "The relative risk was 1.9. But what is the absolute risk for women in their 20's which is used as the baseline?1.Determines in a table, the average, median and standard deviation of each of the distributions to a variable (age, girl reaction time and boys reaction time).What interpretations can you make of it? A.) For each of the three two-variable distributions, make a graphical representation using a technological tool and calculate the values that can be used to interpret them. B.) Interpret graphic representations and draw conclusions.
- A market manager plan to market and sell certain product to improve companies profit. Which the following can be better choice for the manager. Product A: Product A with Mean profit of Php 100,000; Standard deviation of Php 2,000 Product B: Product B with Mean profit of Php 100,000 ; Standard deviation of Php 2,500Calculate estimates of the standard deviations sz, Sy of the samples r = (5,9, 7) and y = (-1,2,5) as well as the Pearson coefficient of correlation rry of r and y. Which of the following answers are correct? a) sz = 4, sy = 9 b) rzy = 0 c) sz = 2, sy = 3 d) Tzy = } e) rzy =
