Problem #3 Size (inches) 9 20 27
Problem #3
Size (inches) 9 20 27 31 35 40 60
Sale Price ($) 147 197 297 447 1177 2177 2497
Use the data above (size and price of TV sets)
- Make a scatter plot of the data.
- Does it appear from inspection that there is a relationship between the variables? Why or why not?
- Calculate the least squares line. Put the equation in the form of: y= a + bx
- Find the correlation coefficient. Is it significant?
- Find the estimated sale price for a 32inch television. Find the cost for a 50inch television.
Problem #4 Among 300 employees in a company 100 had Engineering degree, 110 had MBA degree, and 70 had both Engineering and MBA degrees. If an employee from this company is selected at random, find the probability that the employee
- Has Engineering degree but not MBA.
- Engineering or MBA degree.
Problem #5(
The starting salaries of college instructors have a standard deviation of $2000. How large a sample is needed if we wish to be 95% confident that our sample mean will be within $500 of the true average salary of college instructors?
Problem #6
A pizzeria claims that their mean delivery time is 20 minutes. A competitor wishes to dispute the claim by showing that from a random sample of 16 deliveries, the mean delivery time was 31 minutes with a standard deviation of 10 minutes. Test the hypothesis at 5% level of significance.
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The following are advertised sale prices of color televisions at an electronics store. Size (inches) 9...
The following are advertised sale prices of color televisions at an electronics store. Size (inches) 9 20 27 31 Sale Price ($) 137 177 267 447 1177 2177 2497 35 40 60 Part(a) Part (b) Part (c) O Part (d) Calculate the least squares line. Put the equation in the form of: û = a + bx. (Round your answers to three decimal places.) ý = -759.909 + 55.038 x x Part (0) Find the correlation coefficient r. (Round your...
The following are advertised sale prices of color televisions at an electronics store. Size (inches) Sale...
The following are advertised sale prices of color televisions at an electronics store. Size (inches) Sale Price ($) 9 137 20 187 27 297 31 447 35 1177 40 2177 60 2497 a) Calculate the least squares line. Put the equation in the form of: ŷ = a + bx. (Round your answers to three decimal places.) ŷ =___________+__________x b) Find the correlation coefficient r. (Round your answer to four decimal places.) r=____________ c) Find the estimated sale price for...
. The following are advertised sale prices of color televisions at Anderson's Size (inches) Sale Price...
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#2 please Problem (12 points) Test at 0.05 significance level the claim in a college catalog...
#2 please
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Conduct a hypothesis test for each problem, using the traditional method. Show the 5 steps and all work for each hypothesis test. Be sure you select the correct test to use for each problem. 1. A telephone company claims that less than 30% of all college students have a limited number of text messages per month. A random sample of 150 students revealed that 41 of them have a limited number. Test the company's claim at the 0.01 level of...
Unless otherwise noted, a= .05 16 The authors Problem 5 (5 points): You find a report...
Unless otherwise noted, a= .05
16 The authors Problem 5 (5 points): You find a report about the relationship between education and income. surveyed 36 participants and asked their income and their level of education achieved. Among those participants who had completed a college degree (n 18), the mean income was $35 per hour and the sample variance was 81. Among those participants who had not completed a college degree (n -18), the mean income $25 per hour and the...
[A] From 21, 27, 46, 35, 41, 36, 25 Find (1) Median, (2) Mean, (3) Standard...
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1. The heights are measured for supermodels Niki Taylor, Nadia Avermann, Claudia Schiffer, Elle Macpherson, Christy Turlington,...
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Problem 2 (20pts) The mean balance that college students owe on their credit card is $1096...
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Can you please help me answer and understand this problem? I will rate your answer! Thank...
Can you please help me answer and understand this problem?
I will rate your answer!
Thank you!
The shape of the distribution of the time required to get an oil change at a 20 minute oil change facility is unknown. However, records indicate that the mean time is 214 minutes, and the standard deviation is 35 minutes. Complete parts (a) through (c) (a) To compute probabilities regarding the sample mean using the normal model, what size sample would be required?...
The following are advertised sale prices of color televisions at an electronics store. Size (inches) 9 20 27 31 Sale Price ($) 137 177 267 447 1177 2177 2497 35 40 60 Part(a) Part (b) Part (c) O Part (d) Calculate the least squares line. Put the equation in the form of: û = a + bx. (Round your answers to three decimal places.) ý = -759.909 + 55.038 x x Part (0) Find the correlation coefficient r. (Round your...
. The following are advertised sale prices of color televisions at Anderson's Size (inches) Sale Price ($) 147 9 197 20 297 27 31 447 35 40 2177 60 2497 Table 12.3:3 a. Decide which variable should be the independent variable and which should be the dependent variable. b. Draw a scatter plot of the data. c. Does it appear from inspection that there is a relationship between the variables? Why or why not? d. Calculate the least-squares line. Put...
#2 please
Problem (12 points) Test at 0.05 significance level the claim in a college catalog that the mean price of a textbook at the college bookstore is less than 575. Assume that the prices of textbooks are normally distributed From a random sample of 16 textbooks, a mean of $70.41 with a standard deviation of $19.70, were obtained Problem #2 (12 points) A sample of 54 bears from Yellowstone National Park produces a mean weight of 182.91b. Assuming that...
Unless otherwise noted, a= .05
16 The authors Problem 5 (5 points): You find a report about the relationship between education and income. surveyed 36 participants and asked their income and their level of education achieved. Among those participants who had completed a college degree (n 18), the mean income was $35 per hour and the sample variance was 81. Among those participants who had not completed a college degree (n -18), the mean income $25 per hour and the...
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Problem 2 (20pts) The mean balance that college students owe on their credit card is $1096 with a standard deviation of $350. If all possible random samples of size 144 are taken from this population, determine the following: a) name of the Sampling Distribution b) mean and standard error of the sampling distribution of the mean (use the correct name and symbol for each) c) percent of sample means for a sample of 144 college students that is greater than...
Can you please help me answer and understand this problem?
I will rate your answer!
Thank you!
The shape of the distribution of the time required to get an oil change at a 20 minute oil change facility is unknown. However, records indicate that the mean time is 214 minutes, and the standard deviation is 35 minutes. Complete parts (a) through (c) (a) To compute probabilities regarding the sample mean using the normal model, what size sample would be required?...
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