Reference no: EM13921781
X 4 3 5 11 10 14
Y 6 7 12 17 9 21
1. For the X,Y data compute:
a. r and determine if it is significantly different from zero.
b. the slope of the regression line and test if it differs significantly from zero.
c. the 95% confidence interval for the slope.
2. At a school pep rally, a group of sophomore students organized a free raffle for prizes.
They claim that they put the names of all of the students in the school in the basket and that they randomly drew 36 names out of this basket. Of the prize winners, 6 were freshmen, 14 were sophomores, 9 were juniors, and 7 were seniors.
The results do not seem that random to you. You think it is a little fishy that sophomores organized the raffle and also won the most prizes. Your school is composed of 30% freshman, 25% juniors, 25% sophomores, and 20% seniors.
b. Conduct a significance test to determine whether the winners of the prizes were distributed throughout the classes as would be expected based on the percentage of students in each group. Report your Chi Square and p values.
c. What do you conclude?
3. A geologist collects hand-specimen sized pieces of lime stone from a particular area. A qualitative assessment of both texture and color is made with the following results.
Fine: 4 light, 20 medium, 8 dark Medium: 5 light, 23 medium, 12 dark Coarse: 21 light, 23 medium, 4 dark
Is there evidence of association between color and texture for these lime stones? Explain your answer.
5. Do men and women select different breakfasts? The breakfasts ordered by randomly selecting men and women at a popular breakfast place is shown. Conduct a test for homogeneity at a 5% level of significance.
6. Can a coefficient of determination be negative? Why or why not?
7. The cost of a leading liquid laundry detergent in different sizes is given below. Size (ounces) Cost ($) 16 4 32 5 64 6 200 11
a. Is the least squares line valid for predicting what a 300 ounce size of the laundry detergent would cost? Why or why not?
b. What is the slope of the least squares (best-fit) line? Interpret the slope.
8. Use the information to answer questions a, b, c and d: Suppose an airline claims that its flights are consistently on time with an average delay of at most 15 minutes.
It claims that the average delay is so consistent that the variance is no more than 150 minutes.
Doubting the consistency part of the claim, a disgruntled traveler calculates the delays for his next 25 fights is 22 minutes with a standard deviation of 15 minutes.
a. df =
b. Let α = .05
c. Decision:
d. Conclusion (write out in a complete sentence):
|
Quantity and quality of the companys financial resources
: Your report should be grounded in relevant theory - use the core and recommended reading - at the same time you should consider exploring a new/ innovative idea/venture.
|
|
How would the court system be different
: It has been estimated that 90 percent of all jury trials in the world take place in the United States. What if the United States did not have the right to trial by jury? How would the court system be different
|
|
Current state of the organization
: Write a four to six (4-6) page project introduction that documents the current state of the organization, expands upon the information given above, and includes the following:
|
|
The new corina watch has an expected selling price
: The new Corina watch has an expected selling price per watch of $42, the projected variable cost per unit is $24, and estimated fixed costs per month are $24,120
|
|
Report your chi square and p values
: They claim that they put the names of all of the students in the school in the basket and that they randomly drew 36 names out of this basket. Of the prize winners, 6 were freshmen, 14 were sophomores, 9 were juniors, and 7 were seniors.
|
|
Peroni company paid wages
: Peroni Company paid wages of $170,900 this year. Of this amount, $114,000 was taxable for net FUTA and SUTA purposes. The state's contribution tax rate is 3.1% for Peroni Company. Due to cash flow problems, the company did not make any SUTA payments ..
|
|
Name and describe the four types of prisons for adults
: Directions: Unless otherwise stated, answer in complete sentences, and be sure to use correct English spelling and grammar. Your textbook discusses prison security levels. Name and describe the four types of prisons for adults
|
|
Describe the revocation hearing process
: Your textbook discusses a revocation hearing. For this assignment, describe the revocation hearing process. Include two options after a finding of "guilty," other than prison or continued supervision
|
|
Purchase and installation costs of equipment
: A building in which a car wash could be installed is available under a five-year lease at a cost of $3,300 per month.Purchase and installation costs of equipment would total $305,000. In five years the equipment could be sold for about 10% of its ori..
|