(b) Using an exponential smoothing technique with alpha = 0.2,(i) the forecast for Month 7 is(ii) the forecasting error for Month 4 is(iii) the mean absolute deviation is(to 2 d.p.) Given the following information:Month 1234560Demand 27 3034353942(a) Using the two-month weighted moving average with weights assigned to the oldest inorder 0.2 and 0.8,(i) the forecast for Month 7 is41.4(ii) the forecasting error for Month 5 is4.2(iii) the mean absolute deviation is3.6

Given information:Month123456Demand273034353942 Required:(Part a) Use 2-month weighted moving…

Answered: (b) Using an exponential smoothing…

College Algebra (MindTap Course List)

12th Edition

ISBN:9781305652231

Author:R. David Gustafson, Jeff Hughes

Publisher:R. David Gustafson, Jeff Hughes

Chapter4: Polynomial And Rational Functions

Section4.6: Rational Functions

Problem 11SC: Find the mean hourly cost when the cell phone described above is used for 240 minutes.

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Planetary Velocity The following table gives the mean velocity of planets in their orbits versus their mean distance from the sun. Note that 1AU astronomical unit is the mean distance from Earth to the sun, abut 93 million miles. Planet d=distance AU v=velocity km/sec Mercury 0.39 47.4 Venus 0.72 35.0 Earth 1.00 29.8 Mars 1.52 24.1 Jupiter 5.20 13.1 Saturn 9.58 9.7 Uranus 19.20 6.8 Neptune 30.05 5.4 Astronomers tell us that it is reasonable to model these data with a power function. a Use power regression to express velocity as a power function of distance from the sun. b Plot the data along with the regression equation. c An asteroid orbits at a mean distance of 3AU from the sun. According to the power model you found in part a, what is the mean orbital velocity of the asteroid?
Part B - 1. Spring/Winter or Fall/Winter 2. mean or standard deviation or median or interquartile range Part C - same options as B
(15) 8. For the data below: a) Compute a three-month moving average for all appropriate months (Hint: some months cannot be computed). Actual 3-Month Automobile Tire Sales Moving Average Absolute Month Deviation Tire Sales January February 80.00 74.00 March 60.00 April May 50.00 52.00 June 58.00
2. (2) Consider the wage equation In(wage) A+B EDUC + B,EDUC² +B,EXPER+B,EXPER+B,(EDUC EXPER)+e where the explanatory variables are years of education (EDUC) and years of experience (EXPER). Estimation results for this equation, and for modified versions of it obtained by dropping some of the variables, are displayed in Table 6.10 (see Table6 10.pdf in Canvas). These results are from 200 observations in the file cps5 small. Use a 5% level of significance for all tests. a) Use an F-test and the results in Eqn (A) and Eqn (B) to test H,:B.=0. b) Use an -test and the results in Eqn (A) to test H: B-0. Show that r-F obtained in part a). e) Use an F-test and the results in Eqn (A) and Eqn (C) to test H: B, = B, = B, -=0. d) Use an F-test and the results in Eqn (B) and Eqn (D) to test H,: B, = B, =0. e) Use an F-test and the results in Eqn (A) and Eqn (E) to test H:B, = B, =0.
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; 112.1
A set of experimental measurements of the freezing point of an identified liquid yields a mean of 26.28 degrees Celsius with a standard deviation of 1.35 degrees Celsius. If all the measurements are converted to the Kelvin scale, what is the new standard deviation? (NOTE: Kelvins are equivalent to Celsius degrees plus 273.16)
Suppose that resting pulse rates among healthy adults are normally distributed with a mean of 75 beats per minute and a standard deviation of 25 beats per minute. Use this table or the ALEKS calculator to find the percentage of healthy adults who have resting pulse rates that are more than 68 beats per minute. For your intermediate computations, use four or more decimal places. Give your final answer to two decimal places (for example 98.23%). X %
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QUESTION 10 Heights are generally normally distributed. Men have a mean of 69.5 inches and standard deviation 2.4 inches. Women have a mean of 63.8 inches and standard deviation 2.6 inches. The US Air Force has a height requirement for their pilots to be between 64 inches and 77 inches. Make sure you are rounding Z-scores properly to two places. Part A: Find the two z-scores for women who meet this height requirement z = (smaller value) and z = (larger value) Part B: Using the z-scores from part A, find the proportion of women who meet the height requirement. Give this answer as a decimal. Part C: Find the two z-scores for men who meet this height requirement z = (smaller value) and z = (larger value) Part D: Using the z-scores from part C, find the proportion of men who meet the height requirement. Give this answer as a decimal. Part E: If the height requirement were changed to exclude only the shortest 1% of women and tallest 1% of men, what are the new heights? The in inches. Please…
A) Calculate the mean and standard deviation of the data below with the attach equations (picture 1) and what is the standard error of the mean. DATA BELOW: 0.8775 +- 0.0051 0.8751+- 0.0061 0.8791+-0.0079 0.84087+-0.0039 B) find the weighted average (picture 2) and uncertainty from the data above
An advertisement for a new toothpaste claims that it reduces cavities of children in their cavity-prone years. Cavities per year for their age group are normal with mean 3 and standard deviation 1. A study of 2500 children who used their toothpaste found an average of 2.95 cavities per child. Assume that the standard deviation of the number of cavities of a child using this new toothpaste remains equal Problem 1. to 1. (a) Are these data strong enough, at the 5 percent level of significance, to establish the claim of the toothpaste advertisement? Use the test statistic approach. (b) Without doing any recalculation, do you think there would be a change in the conclusion in part (a) if you decrease the level of significance to 1 percent? Explain your answer.
Thirty AA batteries were tested to determine how long they would last. The results, to the nearest minute, were recorded as follows: Table 3: Life of AA batteries, in minutes Battery life, x (in minutes) Number of battery 360 - 369 2 370 - 379 3 380 - 389 390 - 399 7 400 - 409 410 - 419 4 420 - 429 430 - 439 Based on Table 3: (a) Draw a cumulative frequency curve (ogive) to represent the above data. [Use graph paper] (b) Find the semi inter-quartile range by using the cumulative frequency curve. (c) Estimate the percentage number of battery with the battery life between 400 and 430 minutes. (d) of battery life. Calculate the mean and standard deviation for the number LO 3.

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