Exercise 7.2 The reaction times for a random sample of 9 subjects to a stimulant were recorded as 2.5, 3.6, 3.1, 4.3, 2.9. 2.3, 2.6, 4.1, and 3.4 seconds. Find a. the range b. the standard deviation c. the variance.
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- What is a clinical reason why someone may have an abnormal response to the patellar reflex test. (select all that apply) hypothyroidism injury chronic diabetes alcoholisma. Explain how the experiment was conducted Please dont use chegg answer to answerAn article in Medicine and Science in Sports and Exercise “Electrostimulation Training Effects on the Physical Performance of Ice Hockey Players,” (2005, Vol. 37, pp. 455–460) considered the use of electromyostimulation (EMS) as a method to train healthy skeletal muscle. EMS sessions consisted of 30 contractions (four-second duration, 85 Hz) and were carried out three times per week for three weeks on 17 ice hockey players. The ten-meter skating performance test showed a standard deviation of 0.09 seconds. Construct a 99% confidence interval of the standard deviation of the skating performance test. Assume population is approximately normally distributed. Round your answers to 3 decimal places.
- Calculate the apparent permeability (Papp) for the three experi 1 The following study has been done to investigate the transport of a drug substance across a small intestinal segment in the Ussing chamber a. Calculate the apparent permeability (Ppp) for the three experiments. The volume is 5 ml. The area of the segment is 1.14 cm2 b. Describe what conclusions you can draw from the different experiments. Table 2. Results from three different experiments Initial conc. Conc. on the on the sensor side (rg/ml) Conc. on the sensor side after 60 min Experiment receiving side after 60 min (ug/ml) (ag/ml) 20 0.12 15.7 A-B B A A B+ 5mM carrier inhibitor 20 0.065 16.4 20 0.068 16.0The BOD versus time data for the first 5 days of a BOD test are obtained as follows: Calculate kand Lo. Time (days) 2 4 6 BOD (mg/l) 11 16 19Question 5: Answer only one branch. A: The mean of the waiting time in an emergency room is 80.2 minutes with a standard deviation of 10.5 minutes for people who are admitted for additional treatment. The mean waiting time for patients who are discharged after receiving treatment is 120.6 minutes with a standard deviation of 18.3 minutes. Which times are more variable? B: For the dataset (15, 13, 6, 5, 12, 50, 22, 18), [1] D3, [2]. Percentile rank of a score of 5, [3] Q2.
- In the case of the Smart Gate with two beams, how would the accuracy of the experiment be affected by the space between the beams? Group of answer choices 1-Increasing the space would decrease the accuracy 2-Changing the space would not have any effect on accuracy. 3-Increasing the space would increase accuracyIn the laboratory experiment, "Reynolds’ Number" Describe the difference between a laminar and turbulent flow. The transition between laminar and turbulent flow as a function of NRe is not always straightforward. Describe other parameters that can affect this transition. What could be the probable sources of any errors when conducting this experiment? Conclusion and recommendationA population has a standard deviation of 24. What is the standard error of the sampling distribution if the sample size is 100? A. 0.24 B. 2.4 C. 0.48 D. 4.8
- In a simulation activity, when a man is moving towards the house, the position versus time graph that you observed is a straight line sloping upward. (A) True B) False3. Independent random samples were selected from populations 1 and 2. The sample sizes, means, and variances are as follows: Population 2 Sample Size Sample Mean Sample Variance 35 12.7 49 7.4 1.38 4.14 Find a 95% confidence interval for estimating the difference in the population means (H1 - H1).8.4 Consider a population consisting of the following five values, which represent the number of DVD rentals during the academic year for each of five housemates: 8 14 16 10 11 a. Compute the mean of this population. b. Select a random sample of size 2 by writing the five numbers in this population on slips of paper, mixing them, and then selecting two. Compute the mean for your sample. c. Repeatedly select random samples of size 2, and compute the x value for each sample until you have the x values for 25 samples. d. Construct a density histogram using the 25 x values. Are most of the x values near the population mean? Do the x values differ a lot from sample to sample, or do they tend to be similar? (Hint: See Example 8.1.)