In a study of achievement scores, the class size (number of students in the classroom) and the average student achievement for that class are recorded. Let x = class size and y = average achievement. A scatterplot of In(y) versus x shows a strong negative linear relationship. Output from a regression analysis is shown below. Regression Equation: In(Achievement) = 5.779-0.025(Class Size) Predictor Coef SE Coef T P Constant 5.779 0.2948 19.60 0.000 Class Size -0.025 0.0030 -8.33 0.000 S = 0.4871 R-Sq = 83.4% R-Sq (adj) = 80.8% Based on the information provided above, which of the following statements must be true? (A) Large class sizes cause average student achievement to decrease. (B) The residual plot of the relationship between class size and average student achievement would show a non-random pattern. (C) The correlation between class size and In(achievement) is r = 0.913. (D) There is also a strong negative linear relationship between average student achievement and class size. (E) Larger values of class size are associated with larger values of In(achievement).

In a study of achievement scores, the class size (number of students in the classroom) and the average student achievement for that class are recorded. Let x = class size and y = average achievement. A scatterplot of In(y) versus x shows a strong negative linear relationship. Output from a regression analysis is shown below. Regression Equation: In(Achievement) = 5.779-0.025(Class Size) Predictor Coef SE Coef T P Constant 5.779 0.2948 19.60 0.000 Class Size -0.025 0.0030 -8.33 0.000 S = 0.4871 R-Sq = 83.4% R-Sq (adj) = 80.8% Based on the information provided above, which of the following statements must be true? (A) Large class sizes cause average student achievement to decrease. (B) The residual plot of the relationship between class size and average student achievement would show a non-random pattern. (C) The correlation between class size and In(achievement) is r = 0.913. (D) There is also a strong negative linear relationship between average student achievement and class size. (E) Larger values of class size are associated with larger values of In(achievement).

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

You gave me the answers that I already got correct??????
4. Data from the year 2012 National Health and Nutrition Examination Survey (NHANES) survey includes laboratory measurements on a random sample of more than four-thousand 18 - 65 year old persons in the United States. The following boxplots display the distribution of blood lead levels (mg/dL) for this sample, separately for males and females. The accompanying tables display summary statistics of the sample values. Blood Lead Levels by Biological Sex NHANES Laboratory Data, 2012 Females (n=2,128) Males (n=1,892) 20 i: 1.27 Î: 1.97 s: 1.61 Range: 0.18 -22.3 s: 1.16 Range: 0.18 – 15.2 Percentiles: 5h: 0.60 25th: 1.00 Percentiles: 5h: 0.37 25: 0.62 50: 0.95 50: 1.60 75th: 1.5 75th: 2.4 95: 3.10 95h: 4.6 Blood Lead Level (micrograms/dl) 15 O O HOOD O CaO OD O 0
If A={a,c} and B={n,t,y}, then complete the following. a. Find A×B. b. Find n(A×B). c. Write a multiplication equation involving numerals related to the answers in parts (a) and (b).
-B ted:ANB; AUB 15
How many way are there to arrange the letters in the word BALLOON? Show your work clearly. Your answer should be a single number.
A researcher wants to estimate the average time a person spends commuting to Boston. The researcher chooses a random sample of 22 people and finds that their average commute is 51 minutes with a standard deviation of 17 minutes. Assume that commute times are normally distributed. (a) Why are we allowed to assume that the sampling distribution in this problem is approximately normal? (Select the correct answer) The sample size is large enough. The population is normally distributed. The population standard deviation is known. The margin of error is unknown. (b) Which distribution should be used to find the critical value? (Select the correct answer.) The z-distribution because ? is known. The t-distribution because ? is unknown. The z-distribution because the sample mean is large enough. The t-distribution because the sample size is small. (c) Construct a 90% confidence interval for the true average commute time. Round your answers to two decimal places. lower limit…