Professor Smith took a sample of 190 students from her morning class and a sample of 169 students from her evening class. On Exam 1, all those sampled from the morning class got a 68 while those sampled from the evening class averaged a 70 with a variance of 142. If Professor Smith combines these two samples.. Question 2 What is the combined Exam 1 average? 68.9415 Question 3A What is the combined Exam 1 median? Question 3BWha is the shape of the combined Exam 1 grade distribution? Question 4 What is the combined Exam 1 standard deviation?
How to solve for question 2-4?
Image Transcriptionclose
Professor Smith took a sample of 190 students from her morning class and a sample of 169 students from her evening class. On Exam 1, all those sampled from the morning class got a 68 while those sampled from the evening class averaged a 70 with a variance of 142. If Professor Smith combines these two samples.. Question 2 What is the combined Exam 1 average? 68.9415 Question 3A What is the combined Exam 1 median? Question 3BWha is the shape of the combined Exam 1 grade distribution? Question 4 What is the combined Exam 1 standard deviation?
Expert Answer
Want to see the step-by-step answer?
Related Statistics Q&A
Q: Use one of the following key terms to answer each of the following questions. KEY TERM BANK (separa...
A: Unvariate Analysis : When the analysis of data has only one variable in such cases we use Univariate...
Q: Do you have a great deal of confidence in the advice given to you by your medical doctor? About 35% ...
A: According to the provided information, sample size (n) = 37 and the population proportion of people ...
Q: Consider the following multiple regression model : y hat = -6.72 + 0.51x1 - 0.69x2 + 1.452x...
A: The given multiple regression model is as follows:
Q: Suppose 230 subjects are treated with a drug that is used to treat pain and 54 of them developed nau...
A: Given hypothesis testNull Hypothesis : p = 0.20Alternative Hypothesis : p > 0.20The sample size n...
Q: What does it mean when two variables are described as “positively correlated”?
A: In statistical analysis to measure the relation between two bivariate data, then if the change of a ...
Q: Consider the following data on x= height of a building and y = number of stories for nine notable bu...
A: Given data of x= height of building and y = number of stories for nine notable buildings as shown be...
Q: See attachment for question.
A: Given information:Here, it is given that Xi is a random variable.The probabilities of a random varia...
Q: In a recent court case it was found that during a period of 11 years 851 people were selected for gr...
A: It is given that a particular ethnicity in the population is 40%. From that ethnicity, 80% of 851 pe...
Q: Over the past several months, an adult patient has been treated for tetany (severe muscle spasms). T...
A: Confidence interval when population standard deviation is not known:The formula of confidence interv...
