An electric meter reader took a sample of six electric meter readings in an apartmentbuilding which has a large number of electric meters. The readings, in hundreds of kilowatt-hours, are: 7.7, 8.0, 7.8, 8.3, 8.3, 8.1. The standard deviation (rounded off to four decimals)is:A. 0.2567B. 0.2495C. 0.0627D. 0.2503 Ten prominent citizens have been nominated for a 'Community Citizen of the Year' award.First- and second-place trophies are awarded to the two persons receiving the highest andsecond highest number of votes. In how many different ways can the first and second placetrophies be awarded?O A. 10B. 2C. 90D. 10!

Given the data, 7.7,8,7.8,8.3,8.3,8.1 We will find standard deviations Note, according to the…

Answered: An electric meter reader took a sample…

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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A successful basketball player has a height of 6 feet 6 inches, or 198 cm. Based on statistics from a data set, his height converts to the z score of 3.38. How many standard deviations is his height above the mean? The player's height is _____standard deviation(s) above the mean. (Round to two decimal places as needed.)
Assume that the readings at freezing on a batch of thermometers are normally distributed with a mean of 0°C and a standard deviation of 1.00°C. A single thermometer is randomly selected and tested. Find P62, the 62-percentile. This is the temperature reading separating the bottom 62% from the top 38%.
Assume that the readings on the thermometers are normally distributed with a mean of 0°and standard deviation of1.00°C. A thermometer is randomly selected and tested. Draw a sketch and find the temperature reading corresponding to P91,the 91stpercentile. This is the temperature reading separating the bottom 91% from the top 9%.
If the students make one more measurement using the same equipment and procedures, what is the probability that it will fall between +/- one standard deviation of the mean? 68.3% 90.1% 68.6 % 95.2%
An insurance company is looking over accident statistics. They want to estimate the standard deviation and variance of the age of the driver involved in an automobile accident. They record the age of the driver for a random selection of 100 accidents from around the country. Would it be more appropriate to find a sample standard deviation or population standard deviation in this situation? Select the correct answer below: A. sample standard deviation B. population standard deviation
Use a normal distribution table or a statistical calculator to answer this question. A farm produces 10,000 eggs in a day. The mean mass of an egg is 59 grams. The standard deviation is 5 grams. An egg is "extra-large" if it has a mass between 63 and 69 grams. To the nearest ten eggs, how many extra-large eggs does the farm produce in a day?
Suppose teachers in a certain state earn an annual salary of $54,600, on average. The standard deviation is $10,200. The salaries are normally distributed. 95% of teachers earn within what range of money for their annual salary?
Identify the notation for each given number. For a random sample of 550 randomly selected car batteries, it was found that their output had a mean of 12.5 volts and a standard deviation of 1.2 volts. V = 550 car batteries V = 12.5 volts V = 1.2 volts
As part of a study, 800 college football players are randomly chosen and their weights taken. The distribution of the weights is approximately normal. The average weight is 235 pounds and the standard deviation is 25 pounds. Approximately how many players had weights between 260 pounds and 285 pounds? Select one: a. 432 b. 108 C. none of these d. 216 400 e.
Assume that the readings at freezing on a batch of thermometers are normally distributed with a mean of 0°C and a standard deviation of 1.00°C. A single thermometer is randomly selected and tested. Find P9, the 9-percentile. This is the temperature reading separating the bottom 9% from the top 91%.
Assume that the readings at freezing on a bundle of thermometers are normally distributed with a mean of 0°C and a standard deviation of 1.00°C. A single thermometer is randomly selected and tested. Find P61, the 61-percentile. This is the temperature reading separating the bottom 61% from the top 39%. P61 = °C Submit Question
A grocer finds that the cantaloupes in his store have weights with mean 0.7 kg and standard deviation 53 grams. If this is true, then 99.7% of cantaloupes will have weights between how many grams?

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