For a project in a statistics class, you must collect data and then analyze them using a chi-square statistic. You decide to collect data on how easily people could go 1 week without usingvarious software/social media products. Specifically, you ask 60 of your fellow students which ofthe following three programs they would be most willing to not use for 1 week: (1) e-mail, (2) Facebook, or (3) Snapchat. The obtained frequencies for each of these categories are shown below:E-mail11Facebook9Twitter40Your null hypothesis is that each of the three categories will have the same frequencies (N = 60).Use a = 0.05 What is the df for this correlation?What is the critical value for this one-tailed Pearson's correlation (a = 0.05)?*Hint* use the Pearson Correlation Table; Appendix EWhat is the expected frequency for e-mail?What is the obtained X² value for this study?Should the null hypothesis for this study be rejected?

Given that, null hypothesis is that each of the three categories will have the same frequencies.

Answered: For a project in a statistics class,…

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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Please answer parts d,e,f,g
Raquel runs a BBQ restaurant. She would like to know if the mean number of children that choose beef ribs daily is different from the average number of children that choose pork ribs daily in anticipation of creating a new children's menu. She asks her servers to make a special note every time they take an order from a child and record it in the log book. After 15 days, she records that an average of 39 children every day order beef ribs and 43 order pork ribs. The standard deviations for those 15 days are 3.1 for beef ribs and 2.9 for pork ribs, respectively. (a) Create a 95% confidence interval for the true difference in mean number of children that order beef and pork ribs recorded as (beef - pork). (b) Using the t-table, determine the test statistic and p-value for testing if there is a difference in the mean number of children that order beef and pork ribs daily. You do not need to perform a complete test.
Suppose that a polling company surveyed 600 people about how much time they spend watching television each day. The results of this survey were compiled and used to create this relative frequency histogram. Assume that all percentages shown in the histogram are whole numbers. Each of the bars in this histogram includes only the left endpoint of the class except for the last bar, which also includes the right endpoint. What percentage of respondents said that they watch television at least six hours per day? How many respondents said that they watch television between three and five hours per day?
In a typical set of numerical data, what fraction of the data values lie above Q3?
find an example of when statistics were misused/skewed and state the reason why you think the statistics were reported that way.
I am interpreting a histogram. what do I do if there are two of the highest frequency?
A recent study on driving behavior examined whether the combination of high driving skills and low safety skills is dangerous. Participants were classified as high or low in driving skill based on responses to a driver-skill inventory, then classified as high or low in safety skill based on responses to a driver-aggression scale. An overall measure of driving risk was obtained by combining several variables such as number of accidents, tickets, tendency to speed, etc. The following data were obtained. Use a 2 x 2 ANOVA with the .05 significance level to evaluate the results. What cutoff score(s) should be used? Driving Skill Low High Safety Skill Low M1=5 M2=4.5 S1=2.7 S2=3.8 N1=6 N2=6 HIgh M3=3 M4=3.5 S3=2.9 S4=2.5 N3=6 N4=6 Group of answer choices +4.35 +3.40 +3.49 +4.26
In a data set with 25 scores, if the value 16 occurs 12 times, what is its relative frequency?
WHY IS IT IMPORTANT TO STUDY PATTERNS?
You would like to be able to predict students' grade point averages based on the number of hours they study every week. You randomly select 500 students and have them report their GPA and number of hours they study per week. What statistical test will allow you to predict GPA based on the number of hours a student studies per week? And what is the research question?
The variablilty of statistics is described by
A recent study on driving behavior examined whether the combination of high driving skills and low safety skills is dangerous. Participants were classified as high or low in driving skill based on responses to a driver-skill inventory, then classified as high or low in safety skill based on responses to a driver-aggression scale. An overall measure of driving risk was obtained by combining several variables such as number of accidents, tickets, tendency to speed, etc. The following data were obtained. Use a 2 x 2 ANOVA with the .05 significance level to evaluate the results. Which of the following is one of the research hypotheses? Driving Skill Low High Safety Skill Low M1=5 M2=4.5 S1=2.7 S2=3.8 N1=6 N2=6 HIgh M3=3 M4=3.5 S3=2.9 S4=2.5 N3=6 N4=6 Group of answer choices The difference in driving risk between drivers with high and low driving safety does not depend on driving skill level On average, drivers classified as high and low in safety skill do not…

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