Homework Answers
since p value is not significant >0.05
There is not a statistically significant association between curfew and grades.
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Suppose that we want to investigate whether curfews correlate with differences in grades for students in...
President of the PTA at a local elementary school is concerned that Elemenatry students are spending...
President of the PTA at a local elementary school is concerned that Elemenatry students are spending too much time ONLINE. The President does a survey of middle and highschool students too, to compare number of hours spent online perday. They measure how many hours per day in total are spent online for social media, school work, entertainment or other reasons. The results of the chi Square test of association are shown below. Chi-Square Test for Association: C14, Worksheet columns Rows:...
How are the smoking habits of students related to the smoking habits of their close family...
How are the smoking habits of students related to the smoking habits of their close family members? Here is a two-way table from a survey of male students in six secondary schools in a certain country. At Least One Close Family Member Smokes No Close Family Member Smokes Student Smokes 116 Student Does Not Smoke 205 75 As you can see, there is an association between smoking by close family members and smoking by high school students. The students are...
Cross-Tabulation and Chi-Square Test Respondents were asked to assess their current health condition and to report...
Cross-Tabulation and Chi-Square Test Respondents were asked to assess their current health condition and to report their social class. Data is in the table below Social Class Middle- and Upper Lower- and Working- Class Respondents Tetal Health Status Class Respondents Fair/Poor 220 136 Excellent/Good 472 521 Total 1. What is the independent variable? What is its level of measurement (nominal, ordinal, ratio)? What is the dependent variable? What is its level of measurement (nominal, ordinal, ratio)? 2. Use the frequencies...
Question 1: A survey was conducted to investigate the severity of rodent problems in egg and...
Question 1: A survey was conducted to investigate the severity of rodent problems in egg and poultry operations. A random sample of operators was selected, and the operators were classified according to the type of operation and the extent of the rodent population. A total of 78 egg operators and 53 turkey operators were classified and the summary information is: One reviewer of the study suggested that there may be a problem with the study because results from small operators...
Suppose now we wou ld like to see if getting the vaccine has an impact on...
Suppose now we wou ld like to see if getting the vaccine has an impact on the likelihood of getting the flu. We took a random sample of 1200 Americans and recorded if they got the vaccine and then followed them through the flu season to see if they got the flu. Use the output below to help you answer the questions that follow Contingency table results Rows: vaccine Columns: flu Cell format Count (Expected count) (Contributions to Chi-Square) Total...
To test whether students in a higher grade level will be less disruptive in class, a...
To test whether students in a higher grade level will be less disruptive in class, a school psychologist records the number of documented interruptions during one day of classes from nine local high schools. The sample consisted of nine (n = 9) freshman, sophomore, junior, and senior high school classes. The data for each high school class are given in the table. High School Class Freshman Sophomore Junior Senior 2 3 1 5 4 2 3 2 1 2 ...
Chapter 7, Section 2, Exercise 054 GENETICS AND FAST-TWITCH MUSCLES The gene ACTM3 encodes a protein...
Chapter 7, Section 2, Exercise 054 GENETICS AND FAST-TWITCH MUSCLES The gene ACTM3 encodes a protein that functions in fast-twitch muscles. People can be classified according to which genotype of this gene they have, RR, RX, or XX, and also according to which genetic allele they have, R or X. The study described here, examines the association between this gene and different subgroups of the population. All participants in the study live in Australia. The earlier exercises only included the...
7. A study was conducted to investigate the effectiveness of a new drug for treating Stage...
7. A study was conducted to investigate the effectiveness of a new drug for treating Stage 4 AIDS patients. A group of AIDS patients was randomly divided into two groups. One group received the new drug; the other group received a placebo. The difference in mean subsequent survival (those with drugs - those without drugs) was found to be 1.04 years and a 95% confidence interval was found to be 1.04 ± 2.37 years. Based upon this information: Select one...
I'm not sure how to enter the data. I've tried and it looks wrong. Also C, D, E, F is what I need...
I'm not sure how to enter the data. I've tried and it looks
wrong. Also C, D, E, F is what I need help with as well. I've
attached a copy of my output please tell me what I am doing wrong.
I would like to know how to enter the data correctly.
Out put I keep getting but it looks as if it's off. what am I
doing wrong?
Exercise for Chapter 17 You will be analyzing the data...
A correlation tests whether differences exist between two variables. Question 1 options: a) True b) False...
A correlation tests whether differences exist between two variables. Question 1 options: a) True b) False Question 2 (1 point) You have tested to find whether a relationship exists between hours of sleep the night before an exam and grade on the exam. You have a participant pool of n = 30, df = 28. Your hypothesis is that a significant relationship will exist, where those with more hours of sleep receive higher grades on the exam. This is a...
How are the smoking habits of students related to the smoking habits of their close family members? Here is a two-way table from a survey of male students in six secondary schools in a certain country. At Least One Close Family Member Smokes No Close Family Member Smokes Student Smokes 116 Student Does Not Smoke 205 75 As you can see, there is an association between smoking by close family members and smoking by high school students. The students are...
Cross-Tabulation and Chi-Square Test Respondents were asked to assess their current health condition and to report their social class. Data is in the table below Social Class Middle- and Upper Lower- and Working- Class Respondents Tetal Health Status Class Respondents Fair/Poor 220 136 Excellent/Good 472 521 Total 1. What is the independent variable? What is its level of measurement (nominal, ordinal, ratio)? What is the dependent variable? What is its level of measurement (nominal, ordinal, ratio)? 2. Use the frequencies...
Suppose now we wou ld like to see if getting the vaccine has an impact on the likelihood of getting the flu. We took a random sample of 1200 Americans and recorded if they got the vaccine and then followed them through the flu season to see if they got the flu. Use the output below to help you answer the questions that follow Contingency table results Rows: vaccine Columns: flu Cell format Count (Expected count) (Contributions to Chi-Square) Total...
Chapter 7, Section 2, Exercise 054 GENETICS AND FAST-TWITCH MUSCLES The gene ACTM3 encodes a protein that functions in fast-twitch muscles. People can be classified according to which genotype of this gene they have, RR, RX, or XX, and also according to which genetic allele they have, R or X. The study described here, examines the association between this gene and different subgroups of the population. All participants in the study live in Australia. The earlier exercises only included the...
I'm not sure how to enter the data. I've tried and it looks
wrong. Also C, D, E, F is what I need help with as well. I've
attached a copy of my output please tell me what I am doing wrong.
I would like to know how to enter the data correctly.
Out put I keep getting but it looks as if it's off. what am I
doing wrong?
Exercise for Chapter 17 You will be analyzing the data...
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