Find the instantaneous form for each of the following phasors: 20 (a) A, = j10a, +a (b) B, = j4e-*a, + 6e*P*a, (c) C, = j2e=20%e¬J#lda -20z
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- You are a researcher who wants to know what the mean (µ) level of anxiety would be for the whole population if they were all receiving a new anti-anxiety therapy. You can’t give the therapy to the whole population, so you give it to a sample, and you get M = 32.1 as the average anxiety level for the sample on the therapy. What is the reason that you can’t just simply assume that µ = 32.1? You didn’t use random assignment Sampling error Descriptive statistics Inferential statistics%5D%2C"action"%3A"open"%2C"userld*%3A 1058667002127212725. O 175% Turn In 32. 10 13lecture(12.11): Researchers were interested in the effects of co-sleeping on nightime waking and crying in infants. .They assesed the number of minutes parents reported that their infants were awake and crying for a period of three days. Five of the infants co-slept with thier mothers(Co) and four infants slept in crib(Cr).The researchers wanted to see if there was a difference in the total number of minutes of crying during the 3 nights. for the two groups. A summary of the data is given below Co-sleepers night time crying in minutes: 8, 4, 7, 7, 6 Crib-sleepers night time crying in minutes: 30, 17, 22, 25 Test the hypotheses at (aplha=.05) level of signifcance. using the 5 step hypotheses testing procedure. Clealy state the null and alternative hypotheses. Round your answer to 2 decimal places.
- Scientists are looking at the effects of global warming on clutches of sea turtle hatchlings in different parts of the world. The data below has been collected: 1.Temperature of Incubation (in Kelvin) 2. Gender Group of Hatchling Clutch (0=0% male; 1= greater than 0% but less than or equal to 10% male; 2= greater than 10% but less than 20% male; 3= greater than 20% but less than or equal to 30% male and so on) 3. Number of hatched eggs 4. number of unhatched eggs 5. Location of Turtles (0=west North America; 1= west South America; 2= tropical regions of Pacific; 3= northwestern Atlantic; 4= Indian Ocean Which of the above variables are measured using a nominal scale, ordinal scale and ratio scale. (An answer can be none of variables) thank you,./Please solve it perfectly
- A drug used to reduce the triglyceride (TG) level in the blood was given to 80 patients for 2 weeks. TG reduction was taken as reading after-reading after for each patient. Reductions are given in the following Table 4.4 9.6 10.4 14.3 6.5 11 14 10.6 7.4 12.9 15.1 6.3 8.7 11.9 15.1 6.5 9.1 10.5 11.8 11.4 10 13.7 14.6 15.7 11 11.8 9.2 9.5 11.9 9.2 16.7 10.8 11.9 8.6 11.6 9.4 12.6 14.5 13.4 9.4 12.8 15.2 12.2 12.4 13 12.6 7 12.2 13.2 13.7 13.4 15 13.8 8.5 14.6 12.5 14.1 13.1 11.9 12.4 15.3 11.1 7.5 15 15.7 11.8 13.5 10.1 16.1 12.1 14.7 12.9 16.7 8.7 9.6 11.3 17.2 14.9 14.2 13.4 B. According to Sturges rule calculate the number of interval and interval width C. Construct Frequency distribution Table that include lower limit, upper limit, mid interval, frequency, %, Relative frequency, cumulative frequency and cumulative relative frequency. D. Make frequency distribution Curve and label each axis. Are the data normally distributed and what is the most frequent reductionQ1/ Four engineering classes A, B, C and, D were tested for the percentage of students success in the examination of mathematic measured from each one of them. The following table gives the number of students in each class and percentage of students success collected from each class. Compute the followings: Class A D Number of students in each class 25 30 25 20 Percentages of student's success in each class 72% 74% 75% 65% 1-Total percentage of observed failed students? 2- If a certain class is tested randomly, compute the probability that it is success taken from class B and D?For 30 recent Academy Award ceremonies, ages of Best Supporting Actors (x) and ages of Best Supporting Actresses (y) are recorded. The 30 paired ages yield x = 52.1 years, y = 37.3 years, r = 0.076, P-value = 0.691, and yn = 34.4 + 0.0547x. Find the best predicted value of yn (age of Best Supporting Actress) in 1982, when the age of the Best Supporting Actor (x) was 46 years.
- do fastAn agricultural field trial compares the yield of two varieties of corn. The researchers divide in half each of 8 fields of land in different locations and plant each corn variety in one half of each plot. After harvest, the yields are compared in bushels per acre at each location. The 8 differences (Variety A - Variety B) give x¯=3.07 and s=5.11. Does this sample provide evidence that Variety A had a higher yield than Variety B? (a) State the null and alternative hypotheses: (Type "mu" for the symbol μμ , e.g. mu > 1 for the mean is greater than 1, mu < 1 for the mean is less than 1, mu not = 1 for the mean is not equal to 1)H0 : Ha : (b) Find the test statistic, t = 7,6The specific laboratory are being used to perform chemical analysis. Samples of the same material are sent to the laboratories for analysis as part of the study to determine whether or not they give, on the average, the same result. The analytical results are as follows:- Lab results 58.7-61.9 62.0-65.2 65.3-68.5 68.6-71.8 71.9-75.1 f 4 5 13 9 4 What is the Modal values of the laboratory?