A rainstorm in Portland, Oregon, wiped out the electricity in 10% of the households in the city. Suppose thata random sample of 50 Portland households is taken after the rainstorm.Answer the following.(If necessary, consult a list of formulas.)(a) Estimate the number of households in the sample that lost electricity by giving the mean of therelevant distribution (that is, the expectation of the relevant random variable). Do not round yourresponse.(b) Quantify the uncertainty of your estimate by giving the standard deviation of the distribution. Roundyour response to at least three decimal places.0

Here we have given the information,A rainstorm in Portland, Oregon, wiped out the electricity in 10%…

Answered: (a) Estimate the number of households…

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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Similar questions

company that owns a large number of grocery stores claims that customers who pay by personal check spend an average of $87 with a standard deviation of $22. Assume the amount spent by these customers is normally distributed. What is the probability that a customer spends more than $100? Express your answer as a decimal rounded to four places after the decimal point.
The weights of newborn baby boys born at a local hospital are believed to have a normal distribution with a mean weight of 3335 grams and a standard deviation of 632 grams. If a newborn baby boy born at the local hospital is randomly selected, find the probability that the weight will be less than 3840 grams. Round your answer to four decimal places.
Assume that the average weight of an NFL player is 245.7 lbs with a standard deviation of 34.5 lbs. The distribution of NFL weights is not normal. Suppose you took a random sample of 32 players. What is the probability that the sample average will be between 240 and 252 lbs? Round your answer to three decimal places, eg 0.192.
Assume that the average weight of an NFL player is 245.7 lbs with a standard deviation of 34.5 lbs. The distribution of NFL weights is not normal. Suppose you took a random sample of 32 players. What is the probability that the sample average will be greater than 260 lbs? Round your answer to three decimal places, eg 0.192.
The weights of newborn baby boys born at a local hospital are believed to have a normal distribution with a mean weight of 3811 grams and a standard deviation of 442 grams. If a newborn baby boy born at the local hospital is randomly selected, find the probability that the weight will be between 3590 and 4429 grams. Round your answer to four decimal places.
(a) Approximate the mean and standard deviation. Round each to two decimals. (b) Complete the last two columns in the table above for relative frequency and cumulative frequency. Round any decimals to 3 places. Do not include the zero before the decimal. For example for 0.56, enter .56 (c) What is the shape of the distribution?
Suppose the mean starting salary for nurses is $68,722 nationally. The standard deviation is approximately $10,769. The starting salary is not normally distributed but it is mound shaped. A sample of 43 starting salaries for nurses is taken. What is the mean of the sample mean?μx̄ = What is the standard deviation of the sample mean? Find the probability that the sample mean is more than $77,000. P(x̄ > 77000) =
A study discovered that Americans consumed an average of 13.2 pounds of chocolate per year. Assume that the annual chocolate consumption follows the normal distribution with a standard deviation of 3.2 pounds. d. What is the probability that an American will consume exactly 12 pounds of chocolate next year? enter your response here (Round to four decimal places as needed.) Part 5 e. What is the annual consumption of chocolate that represents the 80th percentile? The 80th percentile is represented by an annual consumption of enter your response here pounds of chocolate. (Type an integer or decimal rounded to one decimal place as needed.)
Round z-score to the nearest hundredth and then find the required A values using the table. The amount of time customers spend waiting in line at a bank normally distributed, with a mean of 3.0 minutes and a standard deviation of 7.5 minute. Find the probability that the time a customer spends waiting is as follows. (A) Less than 3.5 minutes and (B) less than 1.5 minutes.
Find the probability that a normal variable takes on values more than standard deviations away from its mean. (Round your answer to four decimal places.)
How do you do part c?
The amounts of nicotine in a certain brand of cigarette are normally distributed with a mean of 0.964 grams and a standard deviation of 0.296 grams. Find the probability of randomly selecting a cigarette with 0.668 grams of nicotine or less. Round your answer to four decimals.

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