Solar energy is considered by many to be the energy of the future. A recent survey was taken to compare the cost of solar energy to the cost of gas or electric energy. Results of the survey revealed that the distribution of the amount of the monthly utility bill of a three-bedroom house using gas or electric energy had a mean of $117 and a standard deviation of $13. If the distribution can be considered normal: Approximately what percentage of homes will have a monthly utility bill less than $

Q: A dot plot of the speeds of a sample of 50 cars passing a policeman with a radar gun is shown below.

A: Hello! As you have posted 2 different questions, we are answering the first questions. If case you…

Q: Standard Normal Curve Areas (page 1) The column under A gives the proportion of the area under the…

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Q: sets represented by the following histograms has the largest standard deviation?A data set lists the…

A: Given: Minimum = 3 Median = 15 Q3 = 16 IQR = 4 Maximum = 19

Q: A stock’s price fluctuations are approximately normally distributed with a mean of $26.94 and a…

A: Given data: A stock’s price fluctuations are approximately normally distributed with a mean =…

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Q: In nutrition, the recommended daily allowance of vitamins is a number set by the government to guide…

A: The recommended daily allowance is then defined as the mean plus 2.8 times the standard deviation.

Q: The weights of a certain dog breed are approximately normally distributed with a mean of 53 pounds,…

A: Given that, The random variable X is the weight of a certain dog breed It is normally distributed.…

Q: The annual salaries for workers at a local mill are normally distributed with a mean of $45,000 and…

A: The annual salaries for workers at a local mill are normally distributed with a mean of $45,000 and…

Q: A study found out that for a particular area, the average income per family is $24596 and the…

A: Solution

Q: According to a recent survey, the salaries of assistant professors have a mean of $41,750 and a…

A: To get the proportion of professor who earn more than $48,000 we proceed as follows…

Q: The annual income of residents in a county is $42,000 with a standard deviation of $10,000.  Under…

A: From the given information, the distribution of annual incomes is normally distributed with mean…

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A: The given data12,11,1,9,7,8

Q: You are told that the mean income for graduating seniors is $58,500 with a standard deviation of…

A: Given μ=58500σ=4100 Majority of graduating seniors earn income between a and b is,…

Q: Suppose the amount newly married couples spend per week on groceries is normally distributed with a…

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Q: The cholesterol levels of an adult can be described by a normal model with a mean of 185 mg/dL and a…

A: x~Normally distributedmean=μ=185 mg/dLstandard deviation=σ=24z=x-μσ , z~N(0,1)

Q: The average McDonald's restaurant generates $3.4 million in sales each year with a standard…

A:

Q: The weights of a certain dog breed are approximately normally distributed with a mean of 50 pounds,…

A: a)Suppose the random variable x defines the weight of a certain dog breed.

Q: The average McDonald's restaurant generates $3.2 million in sales each year with a standard…

A:

Q: If the Variance of a data set is 16.01, what is the Standard Deviation? State your result as a…

A: Standard deviation is the square root of variance

Q: pose that we ding costs in the Caribbean deviation of $975. Estimate the percentage of Caribbean…

A: Mean=M=6000, Standard deviation=S=975  Note: According to bartelby question answer guidelines an…

Q: What was the range (best approximation) in which at least 75% of the data values fell?

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Q: A data set of employee salaries has an average of $60,000 with a standard deviation of $5,000. You…

A: μ =$ 60000σ=$ 5000x =$ 40000is your salary unusual ?

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A: In a normal distribution, about 68% of the data falls within one standard deviation of the mean,…

Q: which in the picture is an estimator for the population mean µ?

A:

Q: In one town, the number of pounds of leafy greens consumed per person per year has a mean of 10…

A: (1) Standardized z-score:   The standardized z-score represents the number of standard deviations…

Q: The mean value of land and buildings per acre from a sample of properties is $11,800, with a…

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Q: A large group of students took a physics test and the final grades have a mean of 70 with a standard…

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Q: A recent survey was conducted to compare the cost of solar energy to the cost of gas or electric…

A: Given that: Population mean,μ=123 Population standard deviation, σ=9

Q: If a z-score value of a data set is 1.35 what percentile does this correspond to?

A:

Q: The First Chicago Bank is reviewing its service charges and interest-paying policies on checking…

A: Given data,μ=750σ=150

Q: Suppose the distribution of typing speeds in words per minute for experienced typists can be…

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Q: 3. The amount of beer Finnish people drink per year is normally distributed with 1 = 78.7 liters and…

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Q: The annual income for a sample of 450 part-time students is normally distributed with a mean income…

A: Given that: Population mean, μ=31000 Population standard deviation, σ=3000 Sample size, n=450