Answered: State the alternative hypotheses for…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Four scenarios of statistical studies are given below. Decide which study uses a sample statistic. A) An estimated 15% of Americans don't use the internet. B) Parkland Hospital performs 15,000 births a year. Of 1000 subjects in a study on multiple births, 38 gave birth to twins. ). A poll of the entire student body found that 32% of students at Wilson Abner College voted in the last presidential election. D) In 2001, 78% of children diagnosed with cancer were in remission after five years, and this number is improving.
d. Check that calculating appropriate weighted average of your answers in parts b and c gives the answer you found in part a
1. A policeman believes that less than 40% of older drivers speed on highways, but a confidential survey found that 49 out of 88 randomly selected older drivers admitted speeding on highways at least once. Do these data provide convincing evidence that the policeman was wrong?
Difference tests are conducted to determine: A. the representative value in a given set of scores. B. whether two or more groups differ on an outcome. C. if the assumptions of a statistical procedure have been met. D. whether two variables correlate with each other.
9) In examining the ability to complete a variety of information-seeking tasks, Nielsen Norman Group assigned randomly selected people who use iPhones to obtain the answers to a variety of questions like “How many calories are there typically in a slice of thin-crust pizza?” using either their iPhone or a desktop computer. a) State the Hypothesis to show the proportion of people finding the correct answer is lower when using an iPhone than a computer. b) The data below contains the results (either Correct or Incorrect) of the 500 people using iPhones and the 500 people accessing websites on a desktop computer. Use JMP software to test the hypothesis of part a). c) Using aplha = 0.05, draw a conclusion for the hypothesis test. Make sure you state your conclusion in the context of the problem. Answer Answer Type Correct Incorrect Total Computer 400 100 500 Iphone 375 125 500 1000
3) What proportion of people scored worse than 14 or better than 22, based on the following sample: 20 11 16 26 13 28 15 18 21 14 12 17
Another type of painted ceramic vessel is called three-circle red-on-white ( Mimbres Mogollon Archaeology). At four different sites in the Wind Mountain archaeological region, the number of such sherds was counted in local dwelling excavations. Site I Site II Site III Site IV 15 13 38 15 22 2 20 21 4 31 15 13 15 7 44 34 17 23 12 11 12 Shall we reject or not reject the claim that there is no difference in the population mean three-circle red-on-white sherd counts for the four sites? Use a 5% level of significance. (a) What is the level of significance? (b) Find SSTOT, SSBET, and SSW and check that SSTOT = SSBET + SSW. (Use 3 decimal places.) SSTOT = SSBET = SSW = Find d.f.BET, d.f.W, MSBET, and MSW. (Use 3 decimal places for MSBET, and MSW.) dfBET = dfW = MSBET = MSW = Find the value of the sample F statistic. (Use 3 decimal places.)What are the degrees of freedom??(numerator)?(denominator)(c) Find the P-value of the sample…
According to a recent census, 14.3% of all housing units in a certain country are vacant. A county supervisor wonders if her county is different from this. She randomly selects 893 housing units in her county and finds that 162 of the housing units are vacant. Complete parts a through d below. a) State the hypotheses. Let the proportion of housing units in the county that are vacant be denoted by p. Choose the correct answer below. OA. Ho: p<0.143 HA: P = 0.143 O C. Ho: p=0.143 HA: P<0.143 OB. Ho: p=0.143 HA: P = 0.143 O D. Ho: p20.143 HA: P<0.143 b) Name the model and check appropriate conditions for a hypothesis test. What kind of test is this? Choose the correct answer below. Two-proportion t-test Difference in proportions test Proportional t-test O One-proportion z-test Check the appropriate conditions for a hypothesis test. Select the correct choice below and fill in the answer boxes within your choice. (Round to one decimal place as needed.) successes and nqo = than 10. OA. The…
1. μ = 450, o = 25, n = 81 What mean would put 10% of the sample below it?
Another type of painted ceramic vessel is called three-circle red-on-white ( Mimbres Mogollon Archaeology). At four different sites in an archaeological region, the number of such sherds was counted in local dwelling excavations. Site I Site II Site III Site IV 12 16 33 13 28 2 15 19 5 38 15 19 17 8 40 36 15 22 14 19 14 Shall we reject or not reject the claim that there is no difference in the population mean three-circle red-on-white sherd counts for the four sites? Use a 5% level of significance. (b) Find SSTOT, SSBET, and SSW and check that SSTOT = SSBET + SSW. (Use 3 decimal places.) SSTOT = SSBET = SSW = Find d.f.BET, d.f.W, MSBET, and MSW. (Use 3 decimal places for MSBET, and MSW.) dfBET = dfW = MSBET = MSW = Find the value of the sample F statistic. (Use 3 decimal places.)What are the degrees of freedom? (numerator) (denominator) (f) Make a summary table for your ANOVA test.…
According to a recent census, 17.3% of all housing units in a certain country are vacant. A county supervisor wonders if her county is different from this. She randomly selects 876 housing units in her county and finds that 190 of the housing units are vacant. Complete parts a through d below. a) State the hypotheses. Let the proportion of housing units in the county that are vacant be denoted by p. Choose the correct answer below. O A. Ho: p=0.173 ОВ. Но: р-0.173 HA: p<0.173 HA: p#0.173 OC. Ho: p<0.173 HA: p= 0.173 O D. Ho: p20.173 HA: p<0.173 b) Name the model and check appropriate conditions for a hypothesis test. What kind of test is this? Choose the correct answer below. O Proportional t-test Difference in proportions test Two-proportion t-test O One-proportion z-test O o o o
Refer to the sample of body temperatures (degrees Fahrenheit) in the table below. Given these temperatures, what issue can be addressed by conducting a statistical analysis of the data? Subject 2 3 4 5 1 97.0 98.5 97.6 97.7 98.7 8 AM 12 AM 97.6 97.8 98.0 98.4 98.4 Choose the correct answer below. OA. The data can be used to address the issue of whether there is a correlation between body temperatures at 8 AM and at 12 AM. OB. The data can be used to address the issue of whether there is a difference between average body temperature for males and for females. OC. The data can be used to address the issue of whether there is a correlation between average body temperature and a person's exposure to sunlight. OD. The data can be used to find the percentage of people whose body temperature increases with illness. DELL

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State the alternative hypotheses for the following claim: For Division I schools, less than 25% of them have a bulldog as their mascot.