t = 3.2. What conclusion is appropriate at each of the fol- lowing significance levels?
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- The mean arterial pressure (or MAP, average arterial pressure in one cardiac cycle) is a measure for perfusion status. You are interested to know if it is possible to predict an adult's MAP (Y) based on the body surface area (X). Suppose you randomly selected 50 adults, and measured their mean arterial blood pressure (in mmHg) & body surface area (in m2). The results are reflected below: I = 1.6 s, = 0.5 y = 80.1 s, = 16.9 r 0.8 %3D %3D (Source: Nall, R. (2018, April 10). Mean arterial pressure: Normal, low, high readings plus treatment. Retrieved from https://www.healthline.com/health/mean-arterlal-pressurel There is a 99.7% chance that the actual MAP of those with body surface area of 1.66 m2 falls between and OA) 61.5; 102.0 B) 58.9; 104.5 O C) 66.5; 96.9 O D) 71.6; 91.9 E) 51.3; 112.1The Figure below shows the calibration curve for the determination of an analyte. Knowing that the replicas of a sample showed the following signs: 0.114; 0.117 and 0.115, answer: Which option below shows the mean concentration (mg/L), standard deviation (mg/L) and relative standard deviation (%), respectively? a) 144.5 mg/L; 6.7 mg/L and 1%b) 244.5 mg/L; 3.3 mg/Le 10%c) 227.9 mg/L; 3.1 mg/l and 1% In the graph, the y axis represents the signal and the x axis the concentration mg/Lin uncam dIfferent from the mean amount of airborne bacteria in uncarpeted rooms. To test this, carpeted and ount of bacteria on the dish was recorded The results are presented in the following table: Uncarpeted rooms Carpeted rooms 12.1 9.8 Sample mean of bacteria per ft' Sample std. dev. of bacteria per ft Number of rooms tested 3.2 2.7 23 %3D U.05 to see test if the amount off airborne bacteria is different in carpeted rooms than in uncarpeted rooms. I. State your hypotheses II. State the allowable type I error rate (a.) III. Calculate your test statistic, the p-value and draw the physical representation of the p-value IV. Make your decision to either reject the null or fail to reject the null. V. Make a concluding statement. b.) Run a 95% confidence interval for the hypothesis test above. Don't forget to make a proper conclusion.
- "Durable press" cotton fabrics are treated to improve their recovery from wrinkles after washing. "Wrinkle recovery angle" measures how well a fabric recovers from wrinkles. Higher is better. Here are data on the wrinkle recovery angle (in degrees) for two types of treated fabrics: Permafresh Hylite 10 15 12 18 15 19 11 17 13 14 A manufacturer wants to know how large is the difference in mean wrinkle recovery angle. Give a 90% confidence interval for the difference in mean wrinkle recovery angle: [three decimal accuracy] [three decimal accuracy]Before and after heart rate was measured from a group of participants after taking an experimental COVID19 vaccine. Which of the following conclusions is correct for the test results below. > t.test(hrdata$afterVaccine, hrdata$beforeVaccine, paired=TRUE) Paired t-test data: hrdata$afterVaccine and hrdata$beforeVaccine t = 1.4038, df = 9, p-value = 0.1939 alternative hypothesis: true difference in means is not equal to 0 95 percent confidence interval: -2.568014 10.968014 sample estimates: mean of the differences 4.2 Hint* the first line of code should tell you the type of test you are dealing with. There is a significant difference in Heart Rate data between before and After observations. There is No difference in Heart Rate data between Before and After observations. The confidence intervals indicate that there is a difference between Before and After observations.Listed below are the overhead widths (in cm) of seals measured from photographs and the weights of the seals (in kg). The purpose of the study was to determine if weights of seals could be determined from overhead photographs. Is there sufficient evidence to conclude that there is a correlation between overhead widths and the weights of the seals? Use a significance level of α=0.02. a. Determine rs. rs= (Round to three decimal places as needed.) b. Determine the critical values. Critical values are (Round to three decimal places as needed. Use a comma to separate answers as needed.)
- The percentile rank of the data value with z = 2 using the empirical rule is ? (rounded to one decimal place).CONSIDER that the data is CORRELATED use alpha .05. Provide the following: 1. CI of the F value 2. Statistical InterpretationThe acidity of the water in a swimming pool is considered normal if the average of three pH readings is between 7.2 and 7.8 and 7.8, inclusive. The first two readings for a swimming pool are 7.4 and 7.9. What possible values for the third reading p will make the average pH normal?
- Two universities give samples of students the same exam. School A records the follwoing sample statistics: ā1=73, 8,=5.5, ni =80. School B records the follwoing sample statistics: z=69, ,=4.4, n2 =90. We wish to build a 95 % cofidence interval to estimate the difference in means between these schools. Define your variable: O Let p be the proprotion School A students that were higher than School B. Let u the mean test score that School A was higher than School B. Let u be the mean test score. O Let u be the mean test score at School A. Create and interpret a 95% Confidence Interval. Round your answers to one decimal place. Select an answer and Select an answer What is the margin of error? Round your answer to one decimal place. Do these results suggest that School A might have higher means on this test? ? Do these results PROVE that School A might have higher means on this test? The campus president at School A made the following statement. "Our students score an average of 5 points…A river was contaminated with waste materials. Specimens of these materials were collected andtheir physical appearance recorded as shown in Table 3. Is there evidence of association betweencolor and texture for these waste materials based on the given hypothesis? Explain your findings.Use ? = 0.05.H0: No relationship between texture and colourH1: Relationship exist between texture and colour colour colour colour texture light medium dark fine 4 20 8 medium 5 23 12 coarse 21 23 4A CEM 262 student determined the concentration of calcium in a solution using gravimetric analysis. The following concentrations were determined in the five trials: 6.004 g/L, 6.085 g/L, 6.029 g/L, 6.036 g/L, and 6.015 g/L. Use these values to answer the next six questions. Except where noted, report values with units. What is the mean value for this data set? Submit Answer Tries 0/99 What is the standard deviation of this data? Submit Answer Tries 0/99 What is the variance of this data? Submit Answer Tries 0/99 What is the RSD for this data? Please enter the numerical value for RSD without units. (The correct unit for RSD is ppt (parts per thousand), however currently CAPA is not recognizing ppt as a unit.) Submit Answer Tries 0/99 Based upon this data, at the 95% confidence level the true concentration (population mean) is expected to be between what two values? Maximum concentration? Submit Answer Tries 0/99 Minimum concentration? Submit Answer Tries 0/99
