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A study of computer-assisted learning examined learning of "Blissymbols" by children. Blissymbols are pictographs (think of Egyptian hieroglyphs) which are sometimes uitlized to help learning-impaired children communicate. Researcher designed two computer lessons which taught same content using same examples. One lesson required children to interact with material, where as in other children controlled only pace of the lesson. Call these two styles "Active" and "Passive." Children were allotted at random to Active and Passive groups. After lesson, computer presented a quiz which asked the children to recognize 56 Blissymbols. Here are numbers of right identifications by 24 children in Active group: 24 children in Passive group had these counts of correct identifications: Is there good evidence which active learning is superior to passive learning?
Given that Z is standard normal randam variable. Compute the value of Z if area between –Z and Z is 0.754:
The following frequency table determine the ages of 100 shoppers at the local grocery store. Compute the sample mean for this data (mean for the grouped data).
Suppose that during a basketball practice. Joe tries 3 shots from the free throw line; imagine further that he has a probability equal to 0.6 of making each shot and that the attempts are independent. Let 'X' be the number of baskets he makes in t..
The correlation between the returns on Ceramics Craftsman, Inc., and the returns on the S&P 500 is 0.675. The variance of the returns on Ceramics Craftsman, Inc., is 0.004225, and the variance of the returns on the S&P 500 is 0.001467.
Discuss how scale impacts the interpretation of a graph and name the lowest number of a statistically significant sample size and state the statistically appropriate percentage total of displays
On the same chart, produce a graph showing the original probability mass function, and a line graph showing your selected continuous probability density function.
A college's data about incoming freshmen indicates that the mean of their high school GPA was 3.4, with a standard deviation of 0.35. Let X=the GPA of an incoming freshman. The students are randomly assigned to writing groups of size 49.
Is there meaningful relationship between grades and SAT scores? If student scores 450 on the SAT, what do youbelieve his or her GPA will be?
Given the following data, calculate the EMV for each investment alternative. Which is best based on the EMVs you calculated?
Let X be the random variable which denotes the number of saves that are made by the lacrosse goalie. Find the expected value and standard deviation of the random variable.
Computing relative frequencies in a contingency table and a survey of a sample of 347 people is conducted. The survey's respondents are classified according to their political affiliation and their opinion on a bill.
A manager of a gasoline filling station is thinking about a promotion that she hopes will bring in more business to the full-service island. She is considering the option that when a customer requests a fill-up
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