Imagine you are looking to test whether students in an online section of a particular course get higher grades than students in the in-person section. You take a sample of 48 students in the online class and 48 students in the in-person class. You test this using a t-test of students’ final grades. Students in your sample of the online class receive an average grade of 83 with a standard deviation of 6. Students in the in-person class receive an average grade of 75 with a standard deviation of 10. What is the estimated standard error of the difference between means?   (If you miss any of the numerical questions, you can upload a file in the homework 5 file upload assignment showing your work for potential partial credit)数值题

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Calculate The Standard Error Term: Sample Size Group 1  =  19 Sample Size Group 2 = 16  Standard Deviation Group 1  = 4.2 Standard Deviation Group 2 = 5.5 Sample Mean Group 1 = 41.9 Sample Mean Group 2 = 43.5  

Salary information regarding two independent random samples of male and female employees of a large company is shown below.   Male Female Sample size 64 99 Sample mean salary (in $1000s) 440 410 Population variance 888 999   The standard error for the difference between the two means is _____.

Exhibit 10-3 A statistics teacher wants to see if there is any difference in the abilities of students enrolled in statistics today and those enrolled five years ago. Final examination scores from a random sample of students enrolled today and from a random sample of students enrolled five years ago were selected. You are given the following information.   Today Five Years Ago 82 88 σ2 112.5 54 n 45 36 Refer to Exhibit 10-3. The standard error of is _____.

Section A: Read the text and answer the questions. Brutalism is an architectural style, introduced in the 1950s. It uses exposed concrete to create geometric structures with a grey appearance. Concrete buildings are often criticised as cold and ugly, lacking the warmth of stone or the smooth feel of steel. However, concrete, as a building material, has unique characteristics. It is extremely flexible when wet, and is adapted to create interesting shapes. Many urban public buildings, such as universities, have also used concrete as the main material to indicate strength and permanence. Instead of keeping Brutalist buildings, many are being demolished to make space for modern styles. However, this does not acknowledge the cultural history of these buildings, and is not sustainable. Fill in the gap with ONE WORD from the paragraph. 1. Brutalist architecture included exposed concrete, which gave a cold Answer Question 1[input] .

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