For drivers in the 20-24 age bracket, there is a 34% rate of car accidents in one year (based on data from the National Safety Council.)  An insurance investigator finds that in a group of 500 randomly selected drivers aged 20-24 living in a certain city, 40% of them had accidents in the last year. Assuming that the 34% rate applies to aged 20-24 living in that certain city, find the mean and standard deviation for the numbers of people in groups of 500 that can be expected to have accidents.

Q: 4. Consider that in a population of Filipino adults ages 18 to 65, Body Mass Index (BMI) is normally…

A: Given: X~N(μ,σ)μ=28σ=6

Q: A study at a college in the west coast reveals that, historically, 45% of their students are…

A: According to the sum A study at a college in the west coast reveals that, historically, 45% of their…

Q: A population has a standard deviation of 25 and a mean of 300. Given a random sample of size 100,…

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Q: Moore Reno, an officer in the highway patrol group, observed that the speeds of vehicles on a…

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Q: In examining the invoices issued by a company, an auditor finds that the dollar amounts of invoices…

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Q: Suppose that, based on historical data, we believe that the annual percentage salary increases for…

A: Given Information: Mean μ= 12.2% = 0.122 Standard deviation σ = 3.6% = 0.036 Sample size (n) = 9 To…

Q: n a recent year, the ACT scores for high school students with a 3.50 to 4.00 grade point average…

A:

Q: If X is a normally distributed random variable with a mean of 80 and a standard deviation of 12,…

A: Given that.   X~N( μ , ?^2 )   μ=80     , ?=12   Z-score =( x - μ )/?

Q: If x is a normally distributed variable with a mean of 151.7 and a standard deviation of 21.9, what…

A: GivenMean(μ)=151.7standard deviation(σ)=21.9

Q: According to national data, 38% of US adults have blood type O-positive. Suppose that a random…

A: Hi! Thank you for the question, As per the honor code, we are allowed to answer one question at a…

Q: mean of µ = 70 and a standard deviation of σ = 10, what is the probability of obtaining a sample…

A: Given data: A normally distributed population with mean and standard deviation is given as:…

Q: The proportion of all high school students who watch national news is p = 0.57. A random sample of…

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Q: The heights of 100 high school students are measured, with a mean of 175 cm and a standard deviation…

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Q: Suppose that a study of elementary school students reports that the mean age at which children begin…

A: The provided information are: Population mean (µ) = 5.7 Population standard deviation (σ) = 1.2…

Q: For a population with a mean of μ = 55 and a standard deviation of σ = 69, what is the standard…

A: Answer - For a population with a mean of μ = 55 and a standard deviation of σ = 69,             what…

Q: certain city, a researcher wishes to determine whether the average income of the residents is…

A: Given

Q: Suppose that the duration of a particular type of criminal trial is known to be normally distributed…

A:

Q: . Sunshine City was designed to attract retired people, and its current population of 50,000…

A: 6) Given data Mean (µ) = 60 years Standard Deviation(σ) = 16 years Sample size (n)= 100 a) As the…

Q: A small computing centre has found that the number of jobs submitted per day to its computers has a…

A:

Q: In the 2010-2011 National Hockey League (NHL) regular season, the number of penalty minutes per game…

A: From the provided information, Sample size (n) = 30 Sample mean (x̅) = 12.20 Standard deviation (s)…

Q: 2. In a certain barangay, a researcher wishes to determine whether the average expense of the…

A: Given,sample size(n)=15sample mean(x¯)=P 8500standard deviation(S)=P 1500α=0.01

Q: In a certain supermarket, a sample of 60 customers who used a self-service checkout lane averaged…

A: Introduction: Assume that the checkout times of the customers are independent of each other, between…

Q: In a normal distribution with mean 375 and standard deviation 48, how large a sample must be taken…

A: It is an important part of statistics. It is widely used.

Q: Suppose I surveyed a random sample of commuters who had jobs in Manhattan, 51 whose primary mode of…

A: Given that                  We have to find  (a) The question of interest is whether the mean…

Q: 24. Suppose annual salaries for sales associates at Target have a mean of $32,500 and a standard…

A: According to the provided information, Mean (μ) =$32500 Standard Deviation (σ) = $2500

Q: At a customer service call center for a large company, the number of calls received per hour is…

A: Let X represent the random variable   Mean=140 SD=5   X~ Normal (140, 5^2)

Q: At a customer service call center for a large company, the number of calls received per hour is…

A: At a customer service call center for a large company, the number of calls received per hour is…

Q: The manufacturer of a certain brand of auto batteries claims that the mean life of these batteries…

A: Given, x=46.05n=25σ=5.1α=0.025 The hypothesis to be tested here is: H0:μ=50H1:μ<50 This is a left…

Q: Workers employed in a large service industry have an average wage of $15.00 per hour with astandard…

A: Solution: Given information: n= 64 Sample size of workers x=12.50 Sample meanμ=$15.00 Population…

Q: Suppose a waitress keeps track of her tips, as a percentage of the bill, for a random sample of 60…

A:

Q: A sample of university students has an average GPA of 2.78 with a standard deviation of 0.45. If GPA…

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Q: A fast food chain advertises that their large bag of French fries has a weight of 150 grams.  Some…

A: State the hypotheses.

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Q: According to the Annual survey of drugs expenditure in country X, the annual expenditure for…

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Q: For a normally distributed population with a mean of 35 and a standard deviation of 7.5, if a sample…

A: Solution: We are given:

Q: newspaper reporter is writing an article on employment status for young people who don’t have a high…

A: Given that  Sample size n =24 Sample mean =24970 Sample standard deviation =2300

Q: According to the Annual survey of drugs expenditure in country X, the annual expenditure for…

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Q: In a certain experiment M & M candies are randomly grouped in bags of 40 pieces per bag. If 16 % of…

A:

Q: 2. A scrap metal dealer claims that the mean of his cash sales is "no more than $80," but an…

A: Given that: Population mean(u) = $ 80 Sample mean = $ 91 SAMPLE standard deviation = $21 Sample size…

Q: For a normal distribution curve with a mean of 15 and a standard deviation of 4, which range of the…

A: Let X be the random variable from normal distribution with mean (μ) = 15  and standard deviation (σ)…

Q: Given a sample with a mean of 151 and a standard deviation of 27, find the probability that a…

A: Given :  sample with mean of 151 and standard deviation of 27 we have to find P(X > 158 )

Q: Suppose population 1 is all blue cars sold at used car auctions, and the mean sale price of all such…

A: Given  Sales of red cars and blue cars and few other parameters.we need to find whether it has 2…

Q: The AAA reports that the average time it takes to respond to an emergency call is 25 minutes. Assume…

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Q: Based on data from the National Health Board, weights of men are normally distributed with a mean of…

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Q: What is the probability that the mean height of 10 randomly selected women are greater than 66.5…

A: Let X denote the height of the young women. Given that X follows N(mean=64.5, SD=2.5) Then…

Q: In a study of life expectancy in a certain region, the mean age at death was 70 years, and the…

A:

Q: In a study of academic procrastination, the authors of a paper reported that for a sample of 20…

A: It is given that sample mean is 5 hours and the standard deviation is 2.2 hours.

Q: A candy company claims that 18​%of its plain candies are​ orange, and a sample of 200 such candies…

A: Given: n = 200 and p=0.18 Consider, X be the random variable that represents the number of orange…

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.