Reference no: EM13901207
1. Determine whether the samples are independent or dependent.
The effectiveness of a new headache medicine is tested by measuring the amount of time beforethe headache is cured for patients who use the medicine and another group of patients who use aplacebo drug. Explain.
2. Determine whether the samples are independent or dependent.
The effectiveness of a headache medicine is tested by measuring the intensity of a headache inpatients before and after drug treatment. The data consist of before and after intensities for eachpatient.Explain.
3. In a random sample of 500 people aged 20-24, 22% were smokers. In a random sample of 450people aged 25-29, 14% were smokers. Test the claim that the proportion of smokers in the twoage groups is the same. Use a significance level of 0.01.Show all steps of the hypothesis test and all calculations.
4. A researcher wishes to determine whether people with high blood pressure can reduce theirblood pressure by following a particular diet. Use the sample data below to construct a 99%confidence interval for µ1 - µ2 where µ1 and µ2 represent the mean for the treatment group andthe control group respectively.Show all steps of the hypothesis test and all calculations. Use the following t-distribution table - https://www.itl.nist.gov/div898/handbook/eda/section3/eda3672.htm
Treatment Group Control Group
n1 = 85 n2 = 75
x1- = 189.1 x2- = 203.7
s1 = 38.7 s2 = 39.2
For questions 5 - 9 below, use the traditional method of hypothesis testing to test the given claim about the means of two populations. Assume that two dependent samples have been randomly selected from normally distributed populations.
Five students took a math test before and after tutoring. Their scores were as follows.
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Student
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A
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B
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C
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D
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E
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Before
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71
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66
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67
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77
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75
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After
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75
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75
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65
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80
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87
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Using a 0.01 level of significance, test the claim that the tutoring has an effect on the math scores.
5. State the null and alternative hypotheses.
6. Find d,d- , and sd.
7. Find the value of the test statistic, t.
8. Find the critical value(s) and state the decision about the null hypothesis.
9. State the conclusion in non-technical terms.
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Compute the debt to equity ratio
: Compute the debt to equity ratio for each of the following companies.
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Madrid company plans to issue
: The remaining $400,000 sells at par on March 1, 2013. The bonds pay interest semiannually as of June 30 and December 31. Record the entry for the March 1 cash sale of bonds.
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How much interest will boston pay
: On January 1, 2013, Boston Enterprises issues bonds that have a $ 3,400,000 par value, mature in 20 years, and pay 9% interest semiannually on June 30 and December 31. The bonds are sold at par.
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What is the amount of the premium on these bonds at issuance
: The bonds mature in three years. The annual market rate at the date of issuance is 12%, and the bonds are sold for $409,850.
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Measuring the intensity of a headache inpatients
: The effectiveness of a headache medicine is tested by measuring the intensity of a headache inpatients before and after drug treatment. The data consist of before and after intensities for eachpatient.Explain
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Find the standard equation of an ellipse
: Find the standard equation of an ellipse with vertices at (-13,2) and (1,2) and e= 4/7
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Impact of removing styrofoam
: Can you discuss the positive impact of removing styrofoam from the environment on a local level (ie. positive effect on my neighborhood)? and then the positive affects nationally and globally? Are their any negative effects?
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Emergency response guide
: Explain how the ERG (Emergency Response Guide) is used in HAZMAT (Hazardous Material) response, to include the limitations on the ERG.
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Reducing the contamination problems
: Given the following site conditions, identify the technology or technologies which should be considered for eliminating or significantly reducing the contamination problems. Explain the reason for your choice(s). What problems might be encountered..
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