Examlex
A statistics course at a large university is taught in each semester. A student has noticed that the students in semester 1 and semester 2 are enrolled in different degrees. To investigate, the student takes a random sample of 25 students from semester 1 and 25 students from semester 2 and records their final marks (%) provided in the table below. Excel was used to generate descriptive statistics on each sample.
Assume that student final marks are normally distributed in each semester. Can we conclude at the 5% significance level that the variance of semester 2 student's final marks is greater than 150?
Semicolons
Punctuation marks (;) used to connect independent clauses in a sentence that are closely related or to separate items in a complex list.
Grammar Checker
A software or program designed to identify and correct grammatical errors in texts.
Collaborative Writing Programs
Collaborative writing programs are software tools or platforms that enable multiple users to work on the same document simultaneously, facilitating teamwork and content creation.
Outdated
Referring to something that is no longer in use, current, or relevant due to the passage of time or advancements in technology.
Q3: Assuming that all necessary conditions are
Q11: If the Laspeyres price index for a
Q33: Consumers easily organize themselves to support government
Q36: A supermarket chain has its own house
Q39: A problem for developing countries is that
Q72: A time series regression equation for a
Q81: A statistics course at a large university
Q102: A statistics professor investigated some of
Q162: The Spearman rank correlation coefficient must be
Q198: In a simple linear regression model,