The Thanksgiving and Christmas/New Year holidays are among the busiest long-distance travel periods of the year. Consider the following parameters for the distribution of lengths (in miles) of trips taken by Americans during Christmas/New Year: Q1 = 120                  Median = 235                   Q3 = 510                   Mean = 275                  Standard deviation = 105 A) If 50 Christmas/New Year are

Q: If the daily wage of a worker in a large factory has an average of 180 usd, the standard deviation…

A: Given: mean: 180 usd, standard deviation: 5 usd, n = 75.The required probability is…

Q: for this set of data, the standard deviation is equal to: 9,8,10,5,5,2,3,6,3

A: Mean:The formula for finding mean is shown below:

Q: The owner of a computer repair shop has determined that their daily revenue has mean $7000 and…

A:

Q: Calculate the sample median, mean, variance, standard deviation, standard error, and 95% confidence…

A: Mean is the average of all the observation in the sample. Median is the middle value which separate…

Q: how much will the probability that the students are aged above 15 years old change?

A:

Q: Elephants have the longest pregnancy of all mammals. suppose that for Asian elephants, the lenghts…

A: The objective of this question is to find the percentage of Asian elephant pregnancies that are…

Q: A distribution consists of three requencies 250, 300, 350 having neans 30, 15 and 20 and standard…

A: We have given that  Size N1=250 , N2=300, N3=350 Sample mean xbar1 =30 , x2=15 , x3=20 Standard…

Q: Tiger Woods hits an average driver 287.2 yards with a standard deviation of 24.6 yards. What is the…

A: The probability value is calculate by means of standard normal variate with the random variable,…

Q: he lengths of pregnancies are normally distributed with a mean of 268 days and a standard of…

A: mean=268 S.D=15

Q: Suppose the life span of a brand of lightbulbs is normally distributed with a mean of 2000 hours and…

A: It is given that  Mean, μ = 2000 Standard deviation, σ = 320 Z-Score, Z = ( X - μ )/σ

Q: The lengths of pregnancies are normally distributed with a mean of 280 days and a standard deviation…

A:

Q: Suppose that the lengths of pregnancies are normally distributed with a mean of 274 days and a…

A: The provided information is  µ=274 σ=10 P(X>280) P(X-µσ>280-27410)=P(z>0.6000)=0.2743 (from…

Q: The time taken to boil a kettle is normally  distributed with a mean of 94 seconds and  a standard…

A: The provided information is  µ=94 σ=6 P(-a<X<a)=0.40…

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

A: The provided information is:

Q: Assume that the mathematics scores on the SAT are normally distributed with a mean of 500 and a…

A: The mean is 500 and the standard deviation is 100.

Q: uppose the distribution of heights of a group of 200 children is normal with a mean of 150…

A:

Q: Exhibit 6-5 The weight of items produced by a machine is normally distributed with a mean of 8…

A: Given that  Mean = 8 Standard deviation = 2 Find P(X = 8 )

Q: most graduate schools of business require applicants for admission to take an examination. scores on…

A: Given, μ=527σ=112 Let x be score that an individual must score to be in the highest 5%. Therefore,…

Q: William revealed that he makes 1,000,000 dollars annually. The average annual income in the country…

A:

Q: The average number of pounds of red meat a person consumes each year is 196 with a standard…

A: We are given,μ = 196σ = 22n = 60

Q: Suppose that the antenna lengths of woodlice are approximately normally distributed with a mean of…

A: we have to find given probability..

Q: A particular fruit's weights are normally distributed, with a mean of 727 grams and a standard…

A: The mean is 727 and the standard deviation is 34 grams.

Q: Assume that the mathematics scores on the SAT are normally distributed with a mean of 500 and a…

A:

Q: The average credit card debt for college seniors is $3262. If the debt is normally distributed with…

A: Let X be the random variable from normal distribution with mean (μ) = $3262 and standard deviation…

Q: The owner of a computer repair shop has determined that their daily revenue has mean $7200 and…

A: The Z-score of a random variable X is defined as follows: Z = (X – µ)/σ. Here, µ and σ are the mean…

Q: Suppose you organized a​ 10-kilometer race in which the times were normally distributed with a mean…

A: Let X be any selected finishing time. Here, we have to find the percentage of runners took longer…

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: Assume that the mathematics scores on the SAT are normally distributed with a mean of 500 and a…

A: normal distributionμ = 500σ = 100P(570<x<640) = ?

Q: s 6 hours a day. If college students were randomly selected, find the probability that the mean…

A: Let X be the random variable from normal distribution with mean (μ) = 6 hours and standard deviation…

Q: The length in days of human pregnancies is known to be normally distributed with a mean of 266 days…

A: Mean(µ) = 266 Population Standard deviations (σ) = 16Sample size (n) = 50

Q: A student will spend 15 hours average each week in class. If the standard deviation is 2 hours, what…

A: Given that mean=15 and standard deviation = 2 Let, X= number of hours spent by a student in the…

Q: The body temperatures of all mosquitoes in a county have a mean of 57∘F and a standard deviation of…

A:

Q: Suppose the test scores in a class are normally distributed with a mean of 70 and a standard…

A: The Z-score of a random variable X is defined as follows: Z = (X – µ)/σ. Here, µ and σ are the mean…

Q: A report announced that the median sales price of new houses sold one year was $231,000​,and the…

A:

Q: Listed below are the amounts of net worth (in millions of dollars) of the ten wealthiest celebrities…

A:

Q: Suppose the mean income of firms in the industry for a year is $25 million with a standard deviation…

A:

Q: Assume that the mathematics scores on the SAT are normally distributed with a mean of 500 and a…

A: normally distributed with a mean of  500μ=500 standard deviation of  100σ=100we have to find out…

Q: Suppose the average amount of money that people spend on their pets per month is 47 dollars, with a…

A: From the Standard Normal table, the bottom of 30% is -0.5244. The average amount of money spent on…

Q: Assume that adults have IQ scores that are normally distributed with a mean of 100 and a standard…

A: Introduction: If P4 denotes the 4th percentile, then observations lie below P4 with 4% or 0.04…

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.