%3D If sum of the absolute forecasting errors le = 15.6 and the number of forecast is 7 then mean absolute deviation (MAD) will be Select one: O 15.6 17.67 O 2228 O 7.00
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- The mean is 146 and the standard deviation is 35. A score of 41 is how many z-scores below the mean?What is the best approximation of the standard deviation ofthe measures -4, -3.0, 8, and 9?This problem is fill in the blank. Just choose the correct answers. Thank you for your help A scientist has read that the mean birth weight, μ, of babies born at full term is 7.2 pounds. The scientist, believing that μ is less than this value, plans to perform a statistical test. She selects a random sample of birth weights of babies born at full term and finds the mean of the sample to be 6.9 pounds and the standard deviation to be 1.7 pounds. Based on this information, answer the questions below. What are the null hypothesis (H0) and the alternative hypothesis (H1) that should be used for the test? H0: (choose one) less than, less than or equal to, greater than, greater than or equal to, equal to, or not equal to. (choose one) 6.9 pounds, 7.2 pounds, or 1.7 pounds. H1: (Choose one) less than, less than or equal to, greater than, greater than or equal to, equal to, or not equal to. (Choose one) 6.9 pounds, 7.2 pounds, or 1.7 pounds. In the context…
- Suppose that time required to compete a 1040R tax form is normally distributed with a mean of 110 minutes and a standard deviation of 15 minutes. What proportion of the 1040R tax form will be completed in less than 121 minutes. Round your answer to at least 4 decimal places.In 2007, the mean rate of violent crime (per 100,000 people) for 10 regions in the northeast of a certain country was 334. The standard deviation was 126. Assume that the distribution of violent crime rates is unimodal and symmetric. sing the Empirical Rule, between what two values would you expect to find about 68% of the rates? Approximately 68% of the observations fall within the intervalCalculate : (i) Quartile deviation (Q.D.), and (ii) Mean Deviation (M.D.) from mean, f the following data : Marks. : No. of Students : 3. 0-10 6 10-20 5 20-30 30-40 40-50 15 50-60 60-70 3
- i already have answer in question A-D. please help me to solve the rest. topic is unkown standard deviationShow the steps on calculator please. I'm learning how to use my TI-84 The amount of calories consumed by customers at the Chinese buffet is normally distributed with mean 2904 and standard deviation 604. One randomly selected customer is observed to see how many calories X that customer consumes. Round all answers to 4 decimal places where possible. a. The Piggy award will given out to the 3% of customers who consume the most calories. What is the fewest number of calories a person must consume to receive the Piggy award?The lengths of pregnancies in a small rural village are normally distributed with a mean of 265 days and a standard deviation of 16 days. In what range would you expect to find the middle 95% of most pregnancies? Between and If you were to draw samples of size 59 from this population, in what range would you expect to find the middle 95% of most averages for the lengths of pregnancies in the sample? Between and Enter your answers as numbers. Your answers should be accurate to 1 decimal places. Question Help: Message instructor Submit Question 824 tv esc 20 888 F1 F2 F3 F4 F5 F6 @ # $ % & 1 2 4 Q W Y T
- Assume that adults have IQ scores that are normally distributed with a mean of 104.5 and a standard deviation 24.7. Find the first quartile Q,. which is the IQ score separating the bottom 25% from the top 75%. (Hint Draw a graph.) The first quartile is (Type an integer or decimal rounded to one decimal place as needed.)Suppose the exam average in a class is 82% with a standard deviation of 6. What proportion of students scored below 88%? Round to two places.for a population with a standard deviation of 4.2 and mean of 32.5, draw a bell shaped curve, marking location of the mean and the numbers that correspond with all the standard deviations Type your answer here: