A typing school claims that in a six-week intensive course, it can train students to type, on theaverage, at least 60 words per minute. A random sample of 15 graduates is given a typing test and themedian number of words per minute typed by each of these students is given below. Test thehypothesis that the median typing speed of graduates is at least 60 words per minute.StudentsWords per minuteWPM-60 di81217616C53-7711166F59-18828H73138020J66K58-270106056-455-5S=5

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Answered: A typing school claims that in a…

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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An educational psychologist presented a task to a sample of twenty five youngchildren. The table shows the times spent on the task, before completing orabandoning it, by these children.Time(minutes)0-5 5-10 10-15 15-20 20-25Number ofchildren4 7 8 4 2 a) Draw the histogram
2-sample t-test 7. A history professor wants to see if students will read more pages of their history book if it is put online. She asks students to report how many pages they read in the last week. The totals are: Раper 112 85 223 119 46 102 82 111 95 121 100 87 210 155 123 74 198 105 Online 205 146 92 141 104 167 53 210 151 165 199 172 136 48 195 210 184 98 Can we say that students read more pages of the book when it is put online? 8. A local 7-Eleven sells a “Memory Pill" that is supposed to help people...um...remember. You find some Oxnard College students and randomly divide them into two groups of 15 students each. One group takes the actual "Memory Pill" and the other group takes the placebo. You then show them a list of 20 items and want them to remember as many as possible. The experimental group (those taking the pill) remembered an average of 12.3 items from the list, with a sample standard deviation of 5.4. The control group (with the placeb0) remembered an average of 10.9…
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Determine whether the study is an experiment or an observational study, and then identify a major problem with the study. In a survey, 1465 Internet users chose to respond to this question posted on a newspaper's electronic edition: "Is news online as satisfying as print and TV news?" 52% of the respondents said "yes." This is an ________________observational study experiment because the researchers________________________ apply a treatment to do not attempt to modify the individuals. What is a major problem with the study? A. The sample is not very large. B. There is no blinding or replication, which has a high chance of leading to bias. C. The results apply only to Internet users. D. This is a convenience sample with voluntary response, which has a high chance of leading to bias.
To investigate how people communicate over the internet, a researcher had subjects write messages in an online forum. She split her sample of 76 participants into young adults and older adults based on their age. She then compared how many emojis and emoticons the young adults used in their messages compared to the older adults. What is the best test to analyze the results of this study? One Sampe Z Test One Sample t Test Independent Samples t Test Dependent Samples t Test
help please answer in text form with proper workings and explanation for each and every part and steps with concept and introduction no AI no copy paste remember answer must be in proper format with all working
Macmillan Learning Attempt 2 Several studies have shown evidence of a relationship between geographic location and the prevalence of washing with soap. A 2017 Raihan et al. study investigated the differences between soap usage in rural and urban areas of Bangladesh. The data provided in the file represent survey responses from 10,478 Bangladesh residents, labeled as rural or urban, when asked whether they wash their hands with soap before preparing food. CrunchIt! CSV Excel (xls) Excel (xlsx) JMP Mac-Text Minitab14-18 Minitab18+ PC-Text R SPSS Suppose the researchers wish to determine if the proportion of Bangladesh residents who wash their hands with soap before preparing food is significantly larger in urban areas compared to rural areas. Use software to conduct a z-test for the difference of two proportions to answer the researchers' question. Do not use a continuity correction for this test. Give the values of the z-statistic, z, and P-value, P, for this test. Please give z precise…
help please answer in text form with proper workings and explanation for each and every part and steps with concept and introduction no AI no copy paste remember answer must be in proper format with all working

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