The per capita energy consumption level (in kilowatt-hours) in a certain countryfor a recent year can be approximated by a normal distribution, as shown in thefigure.(a) What consumption level represents the 4th percentile?(b) What consumption level represents the 16th percentile?(c) What consumption level represents the third quartile?(a) The consumption level that represents the 4th percentile is(Round to the nearest integer as needed.)(b) The consumption level that represents the 16th percentile is(Round to the nearest integer as needed.)kilowatt-hours.kilowatt-hours.(c) The consumption level that represents the third quartile is kilowatt-hours.(Round to the nearest integer as needed.)272H=2272 kWhoF591.2 kWh2272Kilowatt-hours4272ON

The population mean is 2272 and population standard deviation is 591.2.

Answered: The per capita energy consumption level…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Resting Pulse: earlier this semester we determined our resting pulse. Seventy-nine individuals participated in this data collection. The mean heart rate for all individuals was 65.34 beats per minute. A random sample of 30 heart rates having a mean of 64.97 beats per minute is presented here. Build a frequency table of these data containing six (6) classes with the lower llimit of the second class at 54 beats per minute. Build a chart appropriate for the presentation of these data. Data: 49, 51, 53, 56, 57, 58, 60 , 60, 62, 62, 62, 64, 64 65, 65 , 65, 67, 68, 68, 68, 69, 70 , 70, 72, 72, 72, 72, 75, 75 , 78,
SE
Using the Appendix Table A-1 in Statistical Psychology: The mean for quiz#1 was 1.14, the standard deviation was .30. What proportion of the class scored above a 1.14? What proportion of the class scored below a .8? What proportion of the class scored between a 1.0 and a 1.5? What quiz grades marked off where the middle 95% of the class scored?
Calculate the average (mean) of the data shown, to two decimal places x 17 8.1 16.3 1.8 15.7 28.4 3.1
a) The average temperature (Centigrade) in London varies from 14C to 31C during the year. i. Calculate indices based on March, base = 100 ii. What is the %age variation between the highest and the lowest temperatures? Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Temp C 15 22 19 24 29 28 31 28 27 22 18 14 Index b) Below are the no of customers, visiting a local Tesco Express, in the first week of holiday season. The store manager would like to avoid stock out in the busy period. Provide forecast of sales on Saturday next week, using 3 point moving average and seasonal variation. Assume same seasonal variation next period.
The ages of a random sample of motorcyclists when they were fatally injured in traffic crashes were recorded and tabled below: Age (in years) Below 16 1628 28 - < 40 40 - < 52 52 - < 64 64 - <76 B. 0.55 C. 0.44 Frequency 0 2 6 10 13 5 D. 0.50 Midpoints The relative frequency of motorcyclist's aged between 20 and 50 who were fatally injured in traffic crashes is (rounded off to two decimals): A. 0.38 22 34 46 58 70 Cumulative freq. 0 2 8 18 31 36
Average monthly wages (per employee) in 4 sectors of an economy are as follows: industry: 2000 dinars, building: 2200 dinars, agriculture: 1500 dinars, services: 1800 dinars. Number of people employed in the four sectors are 5 million, 2 million, 6 million, and 2 million, respectively. Using the concept of harmonic mean compute the average monthly wages in the economy under consideration.
For the first half of a baseball season, a player had 85 hits out of 270 times at bat. The player's batting average was 85 270 ≈ 0.315. During the second half of the season, the player had 56 hits out of 275 times at bat. The player's batting average was 56 275 ≈ 0.204. (Round your answers to three decimal places.) (a) What is the average (mean) of 0.315 and 0.204?(b) What is the player's batting average for the complete season?(c) Does the answer in part (a) equal the average in part (b)? YesNo
The data to the right represent the top speed (in kilometers per hour) of all the players (except goaltenders) in a certain soccer league. Construct (a) a relative frequency distribution (b) a frequency histogram, and (c) a relative frequency histogram. What percentage of players had a top speed between 14 and 17.9 km/h? What percentage of players had a top speed less than 13.9 km/h? Speed (km/hr) Number of Players 10–13.9 4 14–17.9 8 18–21.9 18 22–25.9 76 26–29.9 268 30–33.9 177 (a) Construct a relative frequency distribution. Speed (km/hr) Relative Frequency 10–13.9 14–17.9 18–21.9 22–25.9 26-29.9 30–33.9 (Round to four decimal places as needed.)
From the following data relating to average prices of certain commodities
Explain the meaning of the accompanying percentiles. (a) The 5th percentile of the head circumference of males 3 to 5 months of age in a certain city is 41.5 cm. (b) The 95th percentile of the waist circumference of females 2 years of age in a certain city is 49.8 cm. (c) Anthropometry involves the measurement of the human body. One goal of these measurements is to assess how body measurements may be changing over time. The following table represents the standing height of males aged 20 years or older for various age groups in a certain city in 2015. Based on the percentile measurements of the different age groups, what might you conclude?
The following are the P/E ratios (price of stock divided by projected earnings per share) for 15 banks. 34, 19, 21, 20, 23, 14, 22, 29, 23, 24, 43, 31, 23, 18, 15 Find 10th and 75th percentiles for these ratios.(If necessary, consult a list of formulas.) (a) The 10th percentile: (b) The 75th percentile:

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