A recent survey shows that the average of American household’s annual expenditure on coffee is $54.16 with a standard deviation of $10.50. We randomly select a household.  Assuming that the expenditure follows normal distribution, find: a)The probability that their annual expenditure on coffee is less than $25? b)The probability that it is more than $50? c)The probability that it is between $40 and $60? d)The amount less than which 95% of households spend on coffee?

Q: In a Statistics course the professor uses the following grading policy: the bottom 5% of students…

A: Given that  b .Find the probability that a randomly selected student gets an 80 or better? c.…

Q: The table below shows the frequency distribution of the rainfall on 52 consecutive Mondays in a…

A: class frequency  0.00-0.19 23 0.20-0.39 11 0.40-0.59 6 0.60-0.79 2 0.80-0.99 6…

Q: A survey found that women's heights are normally distributed with mean 63.6 in and standard…

A: Given Information: Mean μ=63.6 Standard deviation σ=2.5 A branch of the military requires​ women's…

Q: The p-value… is used to determine the Margin Of Error measures the number of standard deviations…

A: p value is a probabilty  which indicates the decision about null hypothesis assuming true  so that…

Q: Exercise 1: The weight of a random scone sold by your favorite bakery has a mean of 105g I a…

A: Given: μ = 105 σ = 5 Formula Used: Z-score= X-μσn

Q: Consider the prices have a Normal Distribution. Price mean = 75 Price S.D = 8 What is the…

A:

Q: he cost of repairing a smart phone that is out of warranty follows a normal distribution with a mean…

A: given data,normal distribution μ=120σ=8 we haveto findout the z score and probabilities for given…

Q: . What is the probability that a person spends less than 37.0 minutes shopping for groceries?   b.…

A:

Q: Assume that a distribution of 10000 scores is normally distributed with a mean of 90 and a standard…

A:

Q: In order to estimate the average time spent per student on the computer terminals at a local…

A: sample size(n) = 81population standard deviation = 1.5 hoursstandard error for mean = ?

Q: When parking a car in a downtown parking lot, drivers pay according to the number of hours or…

A: Standard deviations=σ=2.8532 k=3.25

Q: The table below shows the frequency distribution of the rainfall on 52 consecutive Wednesdays in a…

A: The frequency distribution of the rainfall on 52 consecutive Wednesdays in a city is,…

Q: A study shows that the normal time that a customer occupied a table in a fine dine restaurant is 1.2…

A: Solution-: Given: μ=1.2,σ=0.4,n=25 We find, (a)  What is the value of the mean of the sample means?…

Q: If z is a standard normal variable, find the probability. The probability that z lies between -1.10…

A: We have to find the probability. The probability that z lies between -1.10 and -0.36.

Q: For a population, a deviation score is computed as X – σ.

A: What is Deviation score ? Deviation score is basically a degree of score from which a raw score is…

Q: b. The length, in meter, of the student in Business Mathematics and Statistics class can be modelled…

A:

Q: According to Chebyshev's theorem, what is the maximum proportion of data values from a data set that…

A: We know that the Chebychev's inequality states that the P(|X-μ|>kσ) < 1/k2 It can be seen as…

Q: In a Statistics examination, the mean score is 82 and the standard deviation is 3.5. What is the Z-…

A:

Q: Do the data appear to have a distribution that is approximately normal? O A. Yes, it is…

A: It is given thatThe table shows the frequency distribution of the rainfall on 52 consecutive Fridays…

Q: Data from the Bureau of Labor Statistics’ Consumer Expenditure Survey show that annual expenditures…

A: Given information- For the year 2001- Population mean, µ = $235 Population standard deviation, σ =…

Q: A study indicates that 18- to 24- year olds spend a mean of 120 minutes watching video on their…

A: The mean is 120 minutes and the standard deviation is 20 minutes.

Q: A statistician uses which of these values to calculate the estimated standard error (SM) when…

A:

Q: SAT exam scores are normally distributed with mean 500 and standard deviation 100.  Give the…

A: Let X=SAT exam score  Given that X is normally distributed with mean=500 and standard deviation=100…

Q: SAT exam scores are normally distributed with mean 500 and standard deviation 100.  Give the…

A: Let, X= SAT score  Given X follows normal distribution with mean=500 and standard deviation=100

Q: Solve the problem. Assume that mountain lions' weights are normally distributed with a mean of 62.6…

A: We have given that,  X be the random variable from normal distribution with mean (μ) = 62.6 ,…

Q: QUESTION 2 Considering the same data: The weekly probability for the number of sold cars by a car…

A: The probability distribution for the number of sold cards by a car salesman is given.

Q: Find the probability that the mean weight of a sample of 25 bookbags will exceed 7 pounds.

A: Here use central limit theorem and standard normal distribution table for probability from z score

Q: The salaries of 1200 pro athletes form a normal distribution with a mean of $79,000 and a standard…

A: For the distribution of the salaries (in $) of 1200 pro athletes, which is defined to be normally…

Q: esdays in a certain city. Use the frequency distribution to construct a histogram. Do a appear to…

A: We have given the frequency distribution of the rainfall on 52 consecutive Wednesdays in a certain…

Q: e patient recovery time from a particular surgical procedure is normally distributed with a mean of…

A: GIVEN DATA, normal distribution μ=5.3σ=1.1we have to find out the given probabilties

Q: The Normal model N(150,10) describes the distribution of scores on the LSAT, a standardized test…

A: Solution : Given : X : Scores on the LSAT and X ~ N(150,10) i.e. μ = 150      σ2 = 10 a. Type of…

Q: SAT verbal scores are normally distributed with a mean of 450 and a standard deviation of 120.…

A: Solution: Let X be the SAT verbal score has normal distribution with mean μ=450 and standard…

Q: The standard deviation of the scores: 2, 1, 1, 8 is 1.71 02 O2.92 O.8.5

A: The scores is 2,1,1,8sample size(n)=4

Q: a. The mean of this distribution is b. The standard deviation is c. The probability that the the…

A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

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.