Question

In: Statistics and Probability

Scott wants to know if there is a relationship between attendance at a particular class and...

Scott wants to know if there is a relationship between attendance at a particular class and whether students pass or fail the final exam. He notes whether each of his 30 students were present or absent at the particular class of interest, and finds that 21 of the students were present. He then also notes whether each student passes or fails the final exam. Of the 21 students who were present at the class of interest, 18 of them passed the final exam. Of the 9 students who were not present, all of them passed the final exam. Is there a significant relationship between attendance at a particular class and whether students pass or fail the final exam?

Solutions

Expert Solution

We use Chi-square test for association between two variables. We can conclude from the above test results that there is no association between two variables.


Related Solutions

You are a researcher who wants to know if there is a relationship between variable Y...
You are a researcher who wants to know if there is a relationship between variable Y and variable X. You hypothesize that there will be a strong positive relationship between variable Y GPA and Variable X hours of sleep. After one semester, you select five students at random out of 200 students who have taken a survey and found that they do not get more than 5 hours of sleep per night. You select five more students at random from...
3. A researcher wants to know if there is a relationship between having death-penalty statutes and...
3. A researcher wants to know if there is a relationship between having death-penalty statutes and having three-strikes laws in place. Based on the information regarding these laws in US states…[Hint: calculated chi-square should be 4.160] Death Penalty Three-strikes law Yes No Yes 19 2 No 19 10 Formulate the null and research/alternative hypotheses. Calculate the chi-square Report the critical chi-square at the corresponding probability level [.05]and degrees of freedom Test the null hypothesis and reach a statistical conclusion; Interpret...
The Owner of WOW Furniture studio wants to know the relationship between sales and the amount...
The Owner of WOW Furniture studio wants to know the relationship between sales and the amount he spent on digital advertising. The sales information for the last four months is repeated below: Month Advertising Expense (Millions) Sales Expense (millions) July 2 7 August 1 3 September 3 8 October 4 10 A) Determine the regression equation Answer: b = a = B) Interpret the values ​​of a and b (fill the blank) The slope is _____ This indicates that _________...
The Owner of WOW Furniture studio wants to know the relationship between sales and the amount...
The Owner of WOW Furniture studio wants to know the relationship between sales and the amount he spent on digital advertising. The sales information for the last four months is repeated below: Month Advertising Expense (Millions) Sales Expense (millions) July 2 7 August 1 3 September 3 8 October 4 10 A) Determine the regression equation Answer: b = a = B) Interpret the values ​​of a and b (fill the blank) The slope is _____ This indicates that _________...
The Owner of WOW Furniture studio wants to know the relationship between sales and the amount...
The Owner of WOW Furniture studio wants to know the relationship between sales and the amount he spent on digital advertising. The sales information for the last four months is repeated below: Month Advertising Expense (Millions) Sales Expense (millions) July 2 7 August 1 3 September 3 8 October 4 10 A) Determine the regression equation Answer: b = a = B) Interpret the values ​​of a and b (fill the blank) The slope is _____ This indicates that _________...
What is the relationship between the attendance at a major league ball game and the total...
What is the relationship between the attendance at a major league ball game and the total number of runs scored? Attendance figures (in thousands) and the runs scored for 12 randomly selected games are shown below. Attendance 18 27 24 30 22 17 30 43 53 38 47 27 Runs 4 4 9 10 5 7 8 11 9 12 8 5 Find the correlation coefficient: r = Round to 2 decimal places. The null and alternative hypotheses for correlation...
What is the relationship between the attendance at a major league ball game and the total...
What is the relationship between the attendance at a major league ball game and the total number of runs scored? Attendance figures (in thousands) and the runs scored for 11 randomly selected games are shown below. Attendance4135464445201310573315 Runs6411910354851 Find the correlation coefficient: r=r=    Round to 2 decimal places. The null and alternative hypotheses for correlation are: H0:H0: ? μ r ρ  == 0 H1:H1: ? r μ ρ   ≠≠ 0 The p-value is:    (Round to four decimal places) Use a level of significance...
head of department in any company wants to know the relationship between drug abuse and dysfunctional...
head of department in any company wants to know the relationship between drug abuse and dysfunctional behavior with in organization.. so what will be relevent population for research?, approprite sample design? and appropriate sample size.? business reseach method ( short ans please)
Question 4 A researcher wants to know the relationship between murder and robbery. The researcher recorded...
Question 4 A researcher wants to know the relationship between murder and robbery. The researcher recorded the number of murders and robberies per 100,000 population for a random selection of cities. Help the researcher to find the relationship between the two variables. Murders, x 2.4 2.7 5.6 2.6 2.1 3.3 6.6 5.7 Robberies, y 25 14 151 91 80 49 173 96         a. Calculate the correlation coefficient, R. Interpret the calculated value of R.       b. Briefly comment on...
Suppose a university teacher wants to know whether or not requiring attendance improves student learning. How...
Suppose a university teacher wants to know whether or not requiring attendance improves student learning. How could she find out? Describe an experiment that an instructor might actually use. Review the experiments posted by your classmates. Evaluate the pros and cons of their proposals, and when applicable, suggest improvements or ask follow-up questions. (175 words)
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT