If x is normally distributed variable with μ = 85 and sigma = 4, find the lower and upper x values that would include 99% of the data. Lower x value = Upper x value =
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If x is
Lower x value =
Upper x value =
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- Q1/ Chose two only: Class 0-10 10-20 20-30 30-40 40-50 50-60 60-70 interval 95 Frequency A// Determine the cumulative frequency for the data above and draw the histogram. 30 60 40 20 10 B// Determine the mean for the data above. C// Determine the Harmonic Mean for the data below: 20 30 40 50 60 70 Frequency 3 6. 18 21 15 ******************************************************************* Class 10-20 20-30 30-40 40-50 50-60 60-70 interval 6. 8. |Frequency Q2/ A// Determine the Median for the data above. 3 4 10 B// Determine the Mode for the data above. ******************************************************************* Q3/ A//Determine the mean by using short- 60 61 62 63 64 65 60 cut method Frequency 8 12 14 9. 7 6. 8. B//Determine the Geometric Mean for the X 20 35 60 75 90 15 10 data. Frequency 4 3 3 1 6. ******************************************************************* Q4/ A / Calculate the Quartile Deviation (Q.D) and coefficient of Q.D. for the data: ( 230 , 620, 390, 350 , 320,…Two random variables have the regression equations : 3 X+2Y- 26 = 0 6X+ Y- 31 = 0 | Fina the mean value and the coefficient of correlation between X and Y. If the variable of X = 25, find the standard deviation of Y from the data given above.Suppose u, and u, are true mean stopping distances at 50 mph for cars of a certain type equipped with two different types of braking systems. The data follows: m = 5, x = 115.1, s, = 5.05, n = 5, y = 129.2, and s, = 5.36. Calculate a 95% CI for the difference between true average stopping distances for cars equipped with system 1 and cars equipped with system 2. (Round your answers to two decimal places.) n USE SALT Does the interval suggest that precise information about the value of this difference is available? O Because the interval is so narrow, it appears that precise information is available. o Because the interval is so wide, it appears that precise information is not available. o Because the interval is so narrow, it appears that precise information is not available. Because the interval is so wide, it appears that precise information is available. You may need to use the appropriate table in the Appendix of Tables to answer this question.
- The article "Effects of Bottle Closure Type on Consumer Perception of Wine Quality"+ reported that in a sample of 106 wine consumers, 22 thought that screw tops were an acceptable substitute for natural corks. Suppose a particular winery decided to use screw tops for one of its wines unless there was strong evidence to suggest that fewer than 23% of wine consumers found this acceptable. USE SALT (a) Using a significance level of 0.10, what would you recommend to the winery? State the appropriate null and alternative hypotheses. Ho: P 0.23 H₂: P = 0.23 O Ho: P = 0.23 H₂: P 0.23 Calculate the test statistic and determine the P-value. (Round your test statistic to two decimal places and your P-value to four decimal places.) X X z = P-value = State the conclusion in the problem context. Reject the null hypothesis. There is not sufficient evidence to suggest that less than 23% of all customers find screw tops acceptable. Reject the null hypothesis. There is sufficient evidence to suggest…Suppose that the average salary of health systems professionals is normally distributed with µ=KES 40,000 and σ = KES 10,000. What proportion of professionals will earn KES 24,800 or less? What proportion of professionals will earn KES 53,500 or more? What proportion of professionals will earn between KES 45,000 and KES 57,000? Calculate the 80th percentile. Calculate the 27th percentile49
- cise 6. Remember, the mean and standard deviation of the n speed of 23.84 mph, with 40 hours describing weights of the yearling Angus steers in Exer- 16. Temperatures A town's January high temperatures a standard deviation of 3.56 mph. One car's z-score was a weight of 1152 pounds with 14. Unusual steers? Suppose a Normal model is useful for weights were 1152 lbs and 84 lbs. Which would be more in July the mean high temperature is 74° and the standard deviation is 8°. In which month is it more average 36°F with a standard deviation of 10°, v 11. Mensa sometimes classi points, wha a 22. More mean of 100 and a standa answ ar they a) I te in Exercise 6 had a mean b) A c) cise 7 were traveling at a mean 23. IQ: ans going? +3.2. How fast was that one a) b) c) unusual, a steer weighing 1000 pounds or one 1250 pounds? 15. Unusual cars? Suppose a Normal model is useful for describing speeds of Stanford cars in Exercise 7. Remem- ber, the mean and standard deviation of the speeds were 23.84 mph…A patient is classified as having gestational diabetes if their average glucose level is above 140 milligrams per deciliter (mg/dl) one hour after a sugary drink is ingested. Rebecca's doctor is concerned that she may suffer from gestational diabetes. There is variation both in the actual glucose level and in the blood test that measures the level. Rebecca's measured glucose level one hour after ingesting the sugary drink varies according to the Normal distribution with μ=140+5 mg/dl and σ=5+1 mg/dl. Using the Central Limit Theorem, determine the probability of Rebecca being diagnosed with gestational diabetes if her glucose level is measured: Once? n=5+2 times n=5+4 times Comment on the relationship between the probabilities observed in (a), (b), and (c). Explain, using concepts from lecture why this occurs and what it means in context.For SRSWOR (N,n), find the ratio estimator of population mean. Show that the estimator is biased.
- tled1.tst 1 / 1 dent/Downloads/Math%201332%20Activity%20%236.pdf X 1 Find the mean, mode, median and midrange. 2) 2 Score Frequency 3 4 5 X 6 Math 1332 Activity #6.pdf: 6231- 7 8 9 10 119% + B HLSATOOGEE f 1 5 4 7 6 10 12 11Spray drift is a constant concern for pesticide applicators and agricultural producers. The inverse relationship between droplet size and drift potential is well known. The paper "Effects of 2,4-D Formulation and Quinclorac on Spray Droplet Size and Deposition"+ investigated the effects of herbicide formulation on spray atomization. A figure in a paper suggested the normal distribution with mean 1050 µm and standard deviation 150 µm was a reasonable model for droplet size for water (the "control treatment") sprayed through a 760 ml/min nozzle. USE SALT (a) What is the probability that the size of a single droplet is less than 1380 µm? At least 950 µm? (Round your answers to four decimal places.) less than 1380 μm at least 950 μm (b) What is the probability that the size of a single droplet is between 950 and 1380 µm? (Round your answer to four decimal places.) (c) How would you characterize the smallest 2% of all droplets? (Round your answer to two decimal places.) The smallest 2% of…It is known that the slope coefficient for regression line Y on X is 0.942 The standard deviation of X and Y are 5 and 9 respectively. Find the value of the correlation coefficient for using given information.
