2. Is there a significant improvement in the learning process of the students based from their pre-evaluation and post evaluation conducted by their teacher? Data: Student No. 1 2 3 4 5 6 7 8 9 10 Pre-Evaluation 25 23 30 7 3 22 12 30 5 14 Post-Evaluation 28 19 34 10 6 26 13 47 16 9

Q: Example 22.2 Suppose we are given the following information: n = 20. 3I =75 and R =15. We are asked…

A:

Q: Here is a bivariate data set. x y 54.6 81.4 50.6 84.5 46.9 92.1 49.2 53.9 13.7 151.7 43 95.1 Find…

A: The table shows bivariate data set.

Q: Detemine the area under the standard normal curve that lies between (a) Z= -0.71 and Z=0.71, (b) Z=…

A: From the provided information, The curve is standard normal and the z values are z = -0.71 and z =…

Q: (a) What is the probability that a randomly chosen person received a Bachelor's Degree? ( (b) What…

A: here use given contingency table and baye's rule and basic probability  probability  = (no of…

Q: Problem 8 (Scattergraph Analysis; Selection of an Activity Base) Kapaskuhan Inc, manufactures…

A: Scatter plot are used to plot two numerical variables. It used to understand the association between…

Q: Suppose that data are obtained from 40 pairs of (x, y) and the sample correlation coefficient is…

A: Confidence interval is the range that explains where the population parameter value lines. When the…

Q: A national standard requires that public bridges over 20 feet in length must be inspected and rated…

A:

Q: Suppose that 55% of people own dogs. If you pick two people at random, what is the probability that…

A: Let p be the probability that a person owns dog. Given that p = 0.55 Let X denote the number of…

Q: O Help One graph in the figure represents a normal distribution with mean u= 15 and standard…

A: Here's first one mean is 15 and standard deviation is 1. Other graph has mean is 10 and standard…

Q: Let Y1, . . . , YN be a random sample from the Normal distribution Yi ∼ N(ln β, s2) where s^2 is…

A:

Q: An urn contains 5 red balls and 4 white balls. Balls are drawn at random one after the other. Every…

A:

Q: Problem 2.7: The joint probability distribution of the continuous random variables X and Y is…

A:

Q: You intend to estimate a population mean μ with the following sample. 12 14 15 18 15 18 17 15 16 16…

A: Given data is 12 , 14, 15, 18, 15, 18, 17, 15 , 16, 16, 14, 12sample size(n)=12sample…

Q: Eric is taller than Annie, but he is smaller than Raul. If E - Eric's height, A - Annie's height and…

A: Here, E-Eric A-Annie R-Raul Eric is taller than Annie, but he is smaller than Raul. Then,…

Q: 2. A random sample of 1500 students was selected from among the senior high school students across…

A: Confidence interval indicate the range where the true value of the population exist. It is…

Q: Following are the scores of ten students in a statistics test. 30, 26, 28, 48,20, 22, 28,23, 35, 38…

A: Given data is30,26,28,48,20,22,28,23,35,38sample size(n)=10Arrange the data in ascending…

Q: With 95% confidence, what is the margin of error when estimating a population mean when n = 100 and…

A:

Q: You observe the following data that represents the average outcomes of two groups of individuals the…

A: From the given information: Group Before After Treated 40 75 Not Treated 20 30 The pre-/…

Q: Which of the following is FALSE regarding MAPE? Check all that apply. O A positive value means the…

A: From the given information we want to know false statement.

Q: The grade point averages​ (GPA) for 12 randomly selected college students are shown on the right.…

A: Given: 2.4 3.1 2.5 1.5 0.6 4 2.5 1.2 3.5 0.2 2.3 3.5

Q: 4. What is the probability for a z-score of 0.2? What is the percentage for a z-score of 0.2? Label…

A:

Q: A change of a dependent variable is all due to a manipulation of intended independent variables .…

A: The probability of a independent variable does not depend on other independent variables. A…

Q: Given below are five observations collected in a regression study on two variables, x(independent…

A: Solution-: We have following table: X Y 11 8 21 41 31 5 51 2 We want to  (a) Develop…

Q: Determine whether the following bivariate data are correlated or not. If they are correlated, tell…

A: Given that  We have to find the direction of association positive or negative....     a. Annual…

Q: A poll is given, showing 40% are in favor of a new building project. If 9 people are chosen at…

A:

Q: According to a magazine, 45% of the world's solar energy cells are manufactured in one country.…

A:

Q: (a) Fit the simple linear regression model using the method of least squares. Find the estimate of…

A: Given: The dependent variable y is mass of the crop. The independent variable x field area.

Q: Transportation engineers determined that to help ease traffic, they would set up tolls for solo…

A: The type of the considered variable and the appropriate hypotheses that involve the "average no. of…

Q: A. A customer from Cavallaro's Fruit Stand picks a sample of 3 oranges at random from a crate…

A:

Q: 9. An electronic device has a life length of X, which is a continuous random variable with PDF…

A:

Q: Method A: Randomly divide a group of 100 people with minor cuts into two groups. Have each group use…

A: The appropriate nature (i.e., survey, observation, or experiment) of the considered methods, which…

Q: An insurer offers a coverage with a policy limit of 1500. The following four claims are observed on…

A:

Q: Suppose the marketing research firm would like to examine if the social networking site that a…

A: For the given data Perform Chi square test

Q: In the 2004 presidential election, exit polls from the critical state of Ohio provided the following…

A:

Q: 1. Using the data computed, test the null hypothesis that there is no significant difference between…

A: Weneed to test the null hypothesis that there is no significant difference between the population…

Q: A researcher estimates that the average height of the buildings of 30 or more stories in a large…

A:

Q: Here are summary statistics for randomly selected weights of newborn girls: n=170, x= 27.6 hg, s=…

A: From the given information we find the 95% confidence interval.

Q: Range =  Standard Deviation =

A: here given data 24 children , n =24

Q: Suppose data is obtained from 20 pairs of (x, y) and the sample correlation coefficient is 0.89. (a)…

A: Solution-: Given: n=20, r=0.89 (a) Test the hypothesis  H0:ρ=0  Vs H1:ρ≠0 with α=0.01 (b) Test the…

Q: An article in the Journal of Sound and Vibration (Vol. 151, 1991, pp. 383-394) described a study…

A:

Q: You may need to use the appropriate technology to answer this question. An amusement park studied…

A: For the given data Perform Anova: Two-Factor With Replication

Q: In a random sample of twelve cell​ phones, the mean full retail price was ​$566.50 and the standard…

A:

Q: The random variable X has CHI-square distribution with 17 degrees of freedom. Answer the following:…

A: Comment: As per the our company guidelines we are supposed to answer only three subparts. Kindly…

Q: a. At the 0.05 level of significance, is there evidence of a difference between o and o3? Determine…

A: Given data : For sample 1 n1 = 13 s1²= 57.3 For sample 2 n2 = 21 s2²= 20.6

Q: Rusiness owners on Suffern Main street claim that the mean peed of automobiles traveling on their…

A:

Q: You are a researcher studying the lifespan of a certain species of bacteria.  A preliminary sample…

A:

Q: The regression equation for predicting a woman's muscle mass (a quantitative metric, Y) from age (in…

A: coefficient of determination = ?

Q: You wish to determine if there is a linear correlation between the two variables at a significance…

A: Given: x y 46 33 51.4 50.4 48.8 23.9 62.9 29.2 33.7 61.9 48.2 15.4 51.3 46.7…

Q: In the 2004 presidential election, exit polls from the critical state of Ohio provided the following…

A:

Q: Example 16.6 Refer to Example 16.3 where r = 0.84 and n = 6. Determine whether there is significant…

A: Given that  correlation coefficient (r)= 0.84  Sample size (n)=6  We have to determine if there is…