1. The attorney for the Food and Drug Administration claims that a Pharmaceutical Company makes cold caplets that containamounts of acetaminophen with a mean different from the 650mg amount indicated on the label.а.Claim:b. Ho:Hạ:с.Analysis:d. Tail of the distribution:2. The instructor claims that her student's mean score for the Final Term Examination is not lower than 50.а.Claim:b. Ho:Ha:с.Analysis:d. Tail of the distribution:3. The effectiveness of Prilosec for treating heartburn is tested by measuring gastric acid secretion in patients before and afterthe drug treatment. Test if there is a decrease after in the gastric acid secretion after the drug treatment.a.Claim:b.Ho:H3:с.Analysis:d. Tail of the distribution:PSYCH 2104 Exer4|1

Answered: 1. The attorney for the Food and Drug…

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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A county environmental agency suspects that the fish in a particular polluted lake have elevated mercury levels. To confirm that suspicion, five striped basses in that lake were caught and their tissues were tested for mercury. For the purpose of comparison, four striped basses in an unpolluted lake were also caught and tested. The fish tissue mercury levels in mg/kg are given below. Sample I(From Polluted Lake) 0.523 0.723 0.523 0.623 0.523 Sample II(From Unpolluted Lake) 0.323 0.223 0.523 0.323 0.000 (a) Construct the 95% confidence interval for the difference in the population means based on these data. (b) Test, at the 5% level of significance, whether the data provide sufficient evidence to conclude that fish in the polluted lake have elevated levels of mercury in their tissue.
This is a friendly reminder about scientific notation. Excel reports very small numbers in scientific notation. For example, 8.15E-05 is typical notation for 8.15 x 10-5. The exponent of -5 means you have to move the decimal five places to the left and fill in with zeroes. What you get is 0.0000815. Here is the Excel output again for the regression of Sales and Experience: Regression Statistics 0.5966 0.3559 0.339 497.9058 Multiple R R Square Adjusted R Square Standard Error Observations ANOVA Regression Residual Total Intercept Experience (months) 40 df 1 38 39 Coefficients 6.6108 SS MS 5205388.04 5205388.04 9420585.51 Standard Error 4250.9742 180.2332 14625973.55 1.4427 247910.15 t Stat 23.586 4.5822 P-value 2.71E-24 4.85E-05 F 20.9971 Lower 95% Upper 95% Significance F 4.85E-05 3886.1113 4615.8372 3.6902 The analyst decides to use an a = 0.05 significance level. Is there a statistically significant relationship between Sales and Experience? 9.5313
10. Gasoline prices. The Table 7 shows the gasoline prices (in dollars) for a sample of service stations. The prices are classified by vendor. At a = 0.05, is there enough evidence to conclude that at least 1 population mean gasoline price is different from the others? Table 7. Gasoline Prices (Dollars) Stewarts Valero Sunoco 2.50 2.52 2.51 2.51 2.51 2.51 2.50 2.51 2.53 2.53 2.51 2.50 2.49 2.52 2.50 2.53 2.52
Using age as the quantitative variable and marital status (married/not married) as the categorical. Develop two research questions.
Three sample observations taken for two variables are shown below: X (In $) (In ounces) 2.78 0.60 1.79 1.47 0.80 2.34 When comparing X and Y, which varies the most? What is the value of this statistic (ornitting unit labels such as $, s2, ounces, ounces Ca. Y, 59.1837 Ob. X, 61.7026 CC. Y, 0.8700 Od. None of the answers is correct Ce. X, 0.9801
A local doctors office recorded the wait times for 70 patients on a saturday afternoon and organized he times in the histogram below a. what percent of people waited more than 15 minutes? b. what percent of people waited less than 20 minutes? c. what percent of people waited less than 5 minutes given they waited less than 20 minutes?
4. A new method for cholesterol utilizing 4 - aminoantipyrine was evaluated in the laboratory. The procedure was run in on 20 separate days. The following values are given: Mean = 150 mg/dl Sum of the squared difference from the mean is 3600 Calculate the SD.
A college administrator wants to know if there is a significant difference between sexual orientation and level of family support for students at their college. The administrator takes a random sample of students who identify as gay/lesbian, bisexual or heterosexual/straight. There were 22 students sampled in each category. A measure of family support is given with higher scores indicating more family support. The means are as follows: Gay/lesbian Bisexual Heterosexual/Straight MG/L = 16 MBi = 17 MH/S = 22 Source SS df MS F Orientation 300 Error 2961 Total What is the value of df total?
Which of the following research scenarios uses a two samples independent-measures t test? a. Examine the difference in self-esteem between student athletes and non-athletes. b. Evaluate the effectiveness of a pain reliever by measuring how much pain is reduced after taking the medication in a single group of people who rated pain, then took the drug and rated pain a second time. c. Test the effectiveness of a cholesterol medication by comparing cholesterol levels before and after the medication is administered to a single group. d. Calculating the z score for the highest X in the data set.
2. Explain the relationship between the population mean ?, the sample mean?̅, and a value of the sample mean ?̅. Which is the population parameter,which is a statistic, which is a point estimate, and which is an estimator?
There is a relationship between political affiliation (on a scale of 1 to 10, where 1 = very liberal and 10 = very conservative) and U.S. geographic regions, such that people living in the Northeast are more likely to consider themselves liberal than people living in the South. what is my unit of analysis?
Consider a sample data set with the summary statistics s= 112, Q = 58, and Q, =203. %3D a. Calculate IQR. b. Calculate IQR/s. c. Is the value of IQR/s approximately equal to 1.3? What does this imply? a. IQR =

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