Question

In: Statistics and Probability

Curious AP Statistics students wanted to know if there was a relationship between dress code violations...

  1. Curious AP Statistics students wanted to know if there was a relationship between dress code violations and disciplinary actions: did students who violated the dress code receive more suspensions, detention, and work detail. In a blind survey, so the identities of the subjects were unknown to the AP students, the AP Statistics students randomly selected 185 students and were given the results of their survey from school administration regarding dress code violations and disciplinary actions. The results are below:

Dress Code Violations

Disciplinary Action        

None

Less than 5           

More than 5

Work Detail

23

18

17

Detention

22

17

15

Suspension

11

27

35

  1. To the table below, add marginal values and next to the observed counts enter the expected counts. (4 points)

Dress Code Violations

Disciplinary Action        

None

Less than 5           

More than 5

Total

Work Detail

23

18

17

Detention

22

17

15

Suspension

11

27

35

  1. Write the null and alternative hypotheses for a chi-square test of independence on these data (2 points).



  1. State and verify the conditions for carrying out the chi-squared test for independence. (2 points)


  1. Determine the test statistic, the degrees of freedom, and the P-value. (6 points)



  2. State your conclusion (6 points):


Solutions

Expert Solution


Related Solutions

A statistics student who is curious about the relationship between the amount of time students spend...
A statistics student who is curious about the relationship between the amount of time students spend on social networking sites and their performance at school decides to conduct a survey. Three research strategies for collecting data are described below. Match each strategy with the correct sampling method. He randomly samples 40 students from the study's population, gives them the survey, asks them to fill it out and bring it back the next day. Answer 1 He gives out the survey...
A statistics student who is curious about the relationship between the amount of time students spend...
A statistics student who is curious about the relationship between the amount of time students spend on social networking sites and their performance at school decides to conduct a survey. Three research strategies for collecting data are described below. In each, name and discuss the sampling method proposed and any bias you might expect. He randomly samples 300 students from the study's population, gives them the survey, asks them to fill it out and bring it back the next day....
A statistics student at a small liberal arts college who is curious about the relationship between...
A statistics student at a small liberal arts college who is curious about the relationship between the amount of time students at his college spend on social networking sites and their performance at school decides to conduct a survey. Four research strategies for collecting data are described below. In each, name the sampling method proposed and any bias you might expect. Strategy 1: He obtains a list of the 1500 students at the college. He chooses a random number k...
Two AP Statistics students wanted to determine if there was a difference in time between the regular checkout lane at the local grocery store and the express “fast” checkout lane
Two AP Statistics students wanted to determine if there was a difference in time between the regular checkout lane at the local grocery store and the express “fast” checkout lane. To collect their data, they randomly selected 15 times during a week, went to the same store, and bought the same item. They flipped a coin to randomly select who would go through the regular lane and who would go through the express lane. They entered their randomly assigned lanes...
****Using excel*** A business manager wanted to know if there was a relationship between daily temperature...
****Using excel*** A business manager wanted to know if there was a relationship between daily temperature measured in degrees Fahrenheit and number of employees who called-in sick each day. He collected the following data over 10 days: Daily Temperature: 54 70 67 57 54 63 72 72 54 71 # Called-in Sick: 33 32 30 37 34 28 31 27 31 26 a. Using excel Find the value of the correlation coefficient (r) for Daily Temperature and # Called-in Sick....
1. If you wanted to find the difference in Elementary Statistics grades between students who transferred...
1. If you wanted to find the difference in Elementary Statistics grades between students who transferred to CSULB from a community college and students who entered CSULB straight out of high school, what test statistic would you use? 2. If you wanted to find the difference in grades among students who took Elementary statistics in their Freshman year, Sophomore year, Junior year, or Senior year in college, what test statistic would you use? 3. If you wanted to see if...
What is the relationship between the amount of time statistics students study per week and their...
What is the relationship between the amount of time statistics students study per week and their final exam scores? The results of the survey are shown below. Time 16 13 9 14 14 16 0 6 Score 98 82 91 100 86 95 62 83 Find the correlation coefficient: r=r=    Round to 2 decimal places. The null and alternative hypotheses for correlation are: H0:H0: ? ρ μ r  == 0 H1:H1: ? ρ μ r   ≠≠ 0 The p-value is:    (Round to four...
What is the relationship between the amount of time statistics students study per week and their...
What is the relationship between the amount of time statistics students study per week and their test scores? The results of the survey are shown below. Time 2 5 9 1 4 11 13 11 13 Score 60 61 70 49 72 84 76 80 83 Find the correlation coefficient: r = Round to 2 decimal places. The null and alternative hypotheses for correlation are: H 0 : = 0 H 1 : ≠ 0 The p-value is: (Round to...
Stephanie is curious in knowing whether there is a relationship between gender and the area of...
Stephanie is curious in knowing whether there is a relationship between gender and the area of interest. She randomly sampled some students and collects the following info. Her objective is find out if the gender influences the choice of the field to study. Science Arts Business Total Male 27 28 45 100 Female 20 41 54 115 Total 47 69 99 215 1. How many degrees of freedom should she use for the Chi-Square test? 2. What is the Chi-Squared...
Drew wondered if the average age of students in AP Statistics classes in his high school...
Drew wondered if the average age of students in AP Statistics classes in his high school is under 18. He randomly selected 10 AP Statistics students in his school and the data set is given below. Using the information from a previous survey, he has concluded that the population standard deviation for the age of AP Statistics students in his school is 1.23. Assume that the ages of students in AP Statistics classes in this high school are normally distributed....
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT