Cashback Offer (1st - 15th August, 2020). Get Flat 10% Cashback credited in your account on minimum transaction of $50. Post Your Question

Question Details Normal
$ 20.00

Stat 200 Week 7 HW

  • From Mathematics, Statistics
  • Due on 22 Mar, 2015 07:05:00
  • Asked On 17 Mar, 2015 05:07:08
  • Due date has already passed, but you can still post solutions.
Question posted by
request

5. 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 won the most prizes. Your school is composed of 30% freshmen, 25% sophomores, 25% juniors, and 20$ seniors. 

a. What are the expected frequencies of winners from each class?

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.

14. A geologist collects hand-specimen sized pieces of limestone from a particular area.  A qualitative assessment of both texture and color is made with the following results. Is there evidence of association between color and texture for limestones?  Explain your answer. 

 

Colour

Texture

Light

Medium

Dark

Fine

4

20

8

Medium

5

23

12

Coarse

21

23

4

 

102. Do men and women select different breakfasts? The breakfasts ordered by randomly selected men and women at a popular breakfast place is shown in Table 11.55. Conduct a test for homogeneity at a 5% level of significance.

 

French Toast

Pancakes

Waffles

Omelettes

Men

47

35

28

53

Women

65

59

55

60

 

Use the following information to answer the next two exercises. The cost of a leading liquid laundry detergent in different sizes is given in Table 12.31.

Size (ounces)

Cost ($)

Cost per ounce

16

3.99

 

32

4.99

 

64

5.99

 

200

10.99

 

Table 12.31

82.

a.Using “size” as the independent variable and “cost per ounce” as the dependent variable, draw a scatter plot of 
the data. 


b.Does it appear from inspection that there is a relationship between the variables? Why or why not? 


c.Calculate the least-squares line. Put the equation in the form of: ŷ = a + bx

a.Using “size” as the independent variable and “cost” as the dependent variable, draw a scatter plot. 


b.Does it appear from inspection that there is a relationship between the variables? Why or why not? 


c.Calculate the least-squares line. Put the equation in the form of: ŷ = a + bx

d.Find the correlation coefficient. Is it significant? 


e.If the laundry detergent were sold in a 40-ounce size, find the estimated cost. 


f.If the laundry detergent were sold in a 90-ounce size, find the estimated cost. 


g.Does it appear that a line is the best way to fit the data? Why or why not? 


h.Are there any outliers in the given data? 


i.Is the least-squares line valid for predicting what a 300-ounce size of the laundry detergent would you cost? Why or why not? 


  1. What is the slope of the least-squares (best-fit) line? Interpret the slope. 
Available Answers
$ 30.00

[Solved] STAT 200 Week 7 Homework | Complete Solution 4

  • This Solution has been Purchased 4 time
  • Submitted On 17 Mar, 2015 09:38:38
Answer posted by
solution

We states our hypotheses as
H0: The fit is good.
 H1: The fit is not good.

Level of significance: α = 0.05(5%)

Critical region:

Χ2 > Χ20.05 and Χ2 < Χ20.95 for v = (r-1) (c-1) degree of freedom.

         
Test statistics:
               Χ2 = ∑▒(E-0)^2/E

The expected frequencies are cal...

Buy now to view full solution.
Other Related Questions
User Profile
tiffa...
User Profile
tiffa...

The benefits of buying study notes from CourseMerit

Assurance Of Timely Delivery
We value your patience, and to ensure you always receive your homework help within the promised time, our dedicated team of tutors begins their work as soon as the request arrives.
Best Price In The Market
All the services that are available on our page cost only a nominal amount of money. In fact, the prices are lower than the industry standards. You can always expect value for money from us.
Uninterrupted 24/7 Support
Our customer support wing remains online 24x7 to provide you seamless assistance. Also, when you post a query or a request here, you can expect an immediate response from our side.
closebutton
Only 45 characters allowed.
closebutton

$ 629.35