Consider the following frequency table representing the scores on a test. Step 2 of 5: Determine the upper class boundary for the fourth class. Scores on a Test Class Frequency 30-48 3 49-67 2 68-86 15 87-105 14 106-124 12

Define the Ordinary Least Squares Estimator? how OLS Estimates the Relationship Between Test Scores and the Student–Teacher Ratio?

Consider the following frequency table representing the scores on a test. Step 3 of 5: Determine the class width of each class. Scores on a Test Class Frequency 30-50 5 51-71 14 72-92 5 93-113 8 114-134 9

2 3 Lunch Spending ($) = x; 28 10 1 15 5 8 606 7 10 618 Z-Scores

For 0.9588Y = 933.36 + 475, where did you guys get the 475 from?

10 Suppose that in a particular state a standardized test is given to all graduating se- niors. Let score denote a student's score on the test. Someone discovers that perfor- mance on the test is related to the size of the student's graduating high school class. The relationship is quadratic: score = 45.6+ .082 class .000147 class², where class is the number of students in the graduating class. (i) How do you literally interpret the value 45.6 in the equation? By itself, is it of much interest? Explain. (ii) From the equation, what is the optimal size of the graduating class (the size that maximizes the test score)? (Round your answer to the nearest integer.) What is the highest achievable test score? (iii) Sketch a graph that illustrates your solution in part (ii). (iv) Does it seem likely that score and class would have a deterministic relationship? That is, is it realistic to think that once you know the size of a student's graduating class you know, with certainty, his or her test…

Rainbow Harbor Cruises charges $16/adult and $8/child for a round-trip ticket. The records show that, on a certain weekend, 900 took the cruise on Saturday and 1000 took the cruise on Sunday. The total receipts for Saturday were $12,800, and the total receipts for Sunday were $12,000. Determine how many adults and children took the cruise on Saturday and on Sunday. Saturday       adults     children Sunday       adults     children

Construct a histogram that represents the following data regarding the score ranges for the extrovertive tendencies of respondents to a personality questionnaire. Step 1 of 5: Find the lower class boundary for the second class. Personality Questionnaire Class Frequency 28-30 8 31-33 9 34-36 3 37-39 8 40-42 9 Copy Data

A company has determined that there are seven possible defects for one of its product lines. Construct a Pareto diagram for the following defect frequencies:Defect Code        FrequencyA                               10B                                70C                               15D                               90E                                 8F                                 4G                                3

18. Car and Taxi Ages When the author visited Dublin, Ireland (home of Guinness Breweryemployee William Gosset, who first developed the t distribution), he recorded the ages of randomlyselected passenger cars and randomly selected taxis. The ages can be found from thelicense plates. (There is no end to the fun of traveling with the author.) The ages (in years) arelisted below. We might expect that taxis would be newer, so test the claim that the mean age ofcars is greater than the mean age of taxis.