Depression and insomnia often go hand-in-hand, and sometimes it is unclear which of the two should be theprimary subject of treatment in individuals suffering from insomnia. Mendoza & Company, a nationalpharmaceutical firm, has positioned itself as a specialist in the production of both antidepressants andsleeping pills. Mendoza's current business model describes the following breakdown of America'sapproximately 50 million adults suffering from insomnia: 17% use both antidepressants and sleeping pillsregularly, 24% use only antidepressants regularly, 15% use only sleeping pills regularly, and the remaining44% use neither antidepressants nor sleeping pills regularly.EspañolA recent issue of the psychiatry journal Patterns contains a study on insomnia. In the study, 160 Americanadults suffering from insomnia (but otherwise chosen at random) were asked about their use ofantidepressants and sleeping pills. The breakdown of their answers is given by the top row of numbers in thetable below. (These numbers are the frequencies observed for the sample of 160 insomniacs.) The secondrow of numbers gives the expected frequencies under the hypothesis that Mendoza's model is correct. Thebottom row of numbers contains the following value for each of the categories of medication use.So-SE) (oObserved frequency -Expected frequencyfEExpected frequencyPart 1Fill in the missing values in the table. Round your responses for the expected frequencies to two or moredecimal places. Round yourresponses to three or more decimal places.SESend data to ExcelOnlyantidepressantsOnlysleepingpillsBothNeitherTotalObservedfrequency43351765160foExpectedfrequencySE24.0070.402.0420.414SEPart 2 Part 2Answer the following to summarize the test of the hypothesis that Mendoza's model is correct.level of significance for the test.(a) Determine the type of test statistic to use.Type of test statistic: (Choose one) ▼(b) Find the value of the test statistic. (Round your answer to two or more decimalplaces.)(c) Find the critical value. (Round your answer to two or more decimal places.)(d) Can we conclude that the percentages given in Mendoza's model are incorrect?OYes ONo

Introduction: Denote p1, p2, p3, and p4, as the respective true proportions of people who use both,…

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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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his K You are testing the null hypothesis that there is no linear relationship between two variables, X and Y. From your sample of n = 18, you determine that b₁ = 4.3 and Sb₁ = 1.4. a. What is the value of tSTAT? b. At the a=0.05 level of significance, what are the critical values? c. Based on your answers to (a) and (b), what statistical decision should you make? d. Construct a 95% confidence interval estimate of the population slope, B₁. e to search a. What are the hypotheses to test? A. Ho: B₁ = 0 H₁: B₁ #0 © C. Ho: P₁20 H₁: B₁ O OD. Ho: B₁ #0 H₁: B₁ = 0 fg 144 f10 84°F ^ @ fil *** 6464 Clear all h12 mportant Information ce Identification Cards. Two cards have been cle insured. Please destroy your old cards ecome effective. A law enforcement officer South Carolina law. The Insurance rovide this proof. that you have liability insurance meeting ons on the ID Card, only the are listed. For a full list of ease reference the Dri (page 7). omptly of any portant polic
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The data show the number of hours of television watched per day by a sample of 28 people. Use technology to answer parts (a) and (b) below. 0 9 00 6 8 = 5 5 3 0 F3 4 3 4 -6 a. Find the data set's first, second, and third quartiles. Q₁ = Q₂ = Q3 (Type integers or decimals. Do not round.) 5 1 2 3 7 3 9 287 5 9 2 b. Draw a box-and-whisker plot that represents the data set. Choose the answer below. Note that different technologies will produce slightly different results. O A. B. 670 9 6 3 2 0 -co C. 0 3 6 -S 9 N
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#6
The test statistic for Ho: p = 0.75 versus HA: p > 0.75 is z = -3.05. What is the p-value for this test? Round to four decimal places. p-value
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T-TEST FOR INDEPENDENT MEANS 1. Two types of instruments for measuring the amount of sulfur monoxide in the atmosphere are being compared in an air pollution experiment. It is desired to determine whether the types of instruments yield measurement having the same variability. The following readings were recorded for the instrument. Sulfur Monoxide Instrument A Instrument B 0.86 0.87 0.82 0.74 0.75 0.63 0.61 0.55 0.89 0.76 0.64 0.70 0.81 0.69 0.68 0.57 0.65 0.53 Assuming the population of measurements to be approximately normally distributed, test the null hypothesis using two tailed test at 0.05 level of significance.
For c is the null hypothesis rejected?

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