Question

In: Statistics and Probability

A professor wants to determine whether her department should keep the requirement of college algebra as...

A professor wants to determine whether her department should keep the requirement of college algebra as a prerequisite for an Introductory Statistics course. Accordingly, she allows some students to register for the course on a pass-fail basis regardless of whether or not they have had the prerequisite. At the end of the semester, the professor compares the number of students passing or failing the class with whether or not they had algebra. Of the 70 students in the class, 30 out of 45 who have had algebra and 5 out of 25 who have not passed the course. Are students more likely to pass the course if they have taken college algebra?

Solutions

Expert Solution


Related Solutions

1. A mathematics professor wants to determine whether there is a difference in the final averages...
1. A mathematics professor wants to determine whether there is a difference in the final averages between the past two semesters (semester I and semester II) of his business statistics classes. For a random sample of 16 students from semester I, the mean of the final averages was 75 with a standard deviation of 4. For a random sample of 9 students from semester II, the mean was 73 with a standard deviation of 6. If the final averages from...
The director of an alumni association for a small college wants to determine whether there is...
The director of an alumni association for a small college wants to determine whether there is any type of relationship between the amount of an alumnus's contribution (in dollars) and the years the alumnus has been out of school. Use the Data Analysis toolpack: Correlation and Regression and answer the questions below. Years Contribution 1 500 5 154 3 300 10 61 7 75 6 80 Give the following: correlation coefficient: is there a significant correlation between variables? Equation of...
The manager of a cosmetics section of a large department store wants to determine whether newspaper...
The manager of a cosmetics section of a large department store wants to determine whether newspaper advertising affects sales.  She randomly selects 10 items currently in stock that are priced at their usual competitive value, and she records the quantity of each item sold for a one-week period.  Then, without changing their price, she places a large ad in the newspaper, advertising the 10 items.  Again, she records the quantity sold for a one-week period.  Her data are listed below:                                 Item # Sold Before...
A recent college grad is trying to decide whether he should keep his presently owned car...
A recent college grad is trying to decide whether he should keep his presently owned car or purchase a new one. A new car will cost $26,000 and have annual operation and maintenance costs of $1200 per year with an $8000 salvage value in 5 years, which is its economic service life. The presently owned car has a resale value now of $5000; 1 year from now it will be $3000, 2 years from now $2500, and 3 years from...
Determine whether the following is a probability distribution. If not, identify the requirement that is not...
Determine whether the following is a probability distribution. If not, identify the requirement that is not satisfied. If yes, find the mean and standard deviation. X P(X) 1 0.15 2 0.13 3 0.15 4 0.10 5 0.10 6 0.37
The U.S government wants to determine whether immigrants should be tested for a contagious disease, and...
The U.S government wants to determine whether immigrants should be tested for a contagious disease, and it is planning to base this decision on financial considerations. Assume that each immigrants who is allowed to enter the United States and has the disease costs the country $100,000. Also, assume that each immigrants who is allowed to enter the United States and does not have the disease will contribute $10,000 to the national economy. Finally, assume that x percent of all potential...
Calculate the NPV for the following project. The company wants to determine whether it should expand...
Calculate the NPV for the following project. The company wants to determine whether it should expand and purchase a new piece of equipment (20% CCA Rate). The equipment will cost $100,000, have a useful life of 20 years, and have a projected salvage value of $5,000. By purchasing the equipment, the company can increase its net revenues by $7,500 per year. Using a discount rate of 10% and a tax rate of 30%, should the company purchase the equipment?
A math department gives all college algebra students a test to test rather or not students...
A math department gives all college algebra students a test to test rather or not students taking college algebra on site perform better on Final than students that take class completely online. The Math department gathers random samples of 40 on-site students (Students who take class in the classroom) and 35 online students. The test score for each student in the random sample is determined. The mean score for the on-site students is 75, with a standard deviation of 12....
Lisa wants to determine if graduates from her college earn different incomes compared to graduates from...
Lisa wants to determine if graduates from her college earn different incomes compared to graduates from college in general. To test this, Lisa sends surveys to 1,000 graduates from her school and finds that the average income is $40,000 ( s = 5,000). If the average income is $45,000 for graduates in general, do graduates from Lisa's school differ significantly? Report the results in APA style and be sure to include information about effect size.
A statistics professor asked her students whether or not they were registered to vote. In a...
A statistics professor asked her students whether or not they were registered to vote. In a sample of 50 of her students (randomly sampled from her 700 students), 35 said they were registered to vote. Questions 1 - 6 pertain to scenario 1. Question 1 (1 point) Which of the following properly explains the 95% confidence interval for the true proportion of the professor's students who were registered to vote? Question 1 options: a) We are 95 % confident that...
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT