Recent research suggests that the amount of timethat parents spend talking about numbers can have abig effect on the mathematical development of theirchildren (Levine, Suriyakham, Rowe, Huttenlocher,& Gunderson, 2010). In the study, the researchersvisited the children's homes between the ages of 14and 30 months and recorded the amount of “numbertalk" they heard from the children's parents. Theresearchers then tested the children's knowledge ofthe meaning of numbers at 46 months. The followingdata are similar to the results obtained in the study.Children's Knowledge-of-Numbers Scores forTwo Groups of ParentsLow Number-TalkHigh Number-TalkParentsParents2, 1, 2, 3, 43, 4, 5, 4, 53, 3, 2, 2, 15, 3, 4, 1, 24, 2, 3, 5, 45, 3, 4, 5, 4Sketch a polygon showing the frequency distributionfor children with low number-talk parents. In thesame graph, sketch a polygon showing the scores forthe children with high number-talk parents. (Use twodifferent colors or use a solid line for one polygonand a dashed line for the other.) Does it appear thatthere is a difference between the two groups?

Answered: Recent research suggests that the…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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In a recent poll six hundred adults were asked a series of questions about the state of the economy and their children's future. One question was, "do you expect your children to have a better life than you have had, a worse life, or a life about the same as yours?" Suppose the responses showed 246 better, 312 worse, and 42 about the same. Use the sign test and a = 0.05 to determine whether there is a difference between the number of adults who feel their children will have a better life compared to a worse life. State the null and alternative hypotheses. (Let p = the proportion of adults who feel their children will have a better life.) Ho: P 0.50 O Ho: P = 0.50 H₂: P = 0.50 Ho: P = 0.50 # H₂: P = 0.50 Find the value of the test statistic. (Round your answer to two decimal places.) z = -2.79 X Find the p-value. (Round your answer to four decimal places.) p-value = 0.0052 What is your conclusion? Reject Ho. There is not sufficient evidence to conclude that there is a significant…
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I want to run an additional post hoc test to compare the stats knowledge of first year psychology majors before taking the course, with their knowledge after taking the course (to see if I successfully taught them). What post-hoc test would be appropriate? Explain your reasoning.

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