condé nast traveler conducts an annual survey in which readers rate their favorite cruiseship. All ships are rated on a 100-point scale, with higher values indicating better service.A sample of 37 ships that carry fewer than 500 passengers resulted in an average ratingof 85.36, and a sample of 44 ships that carry 500 or more passengers provided an averagerating of 81.40. Assume that the population standard deviation is 4.55 for ships that carryfewer than 500 passengers and 3.97 for ships that carry 500 or more passengers.a. What is the point estimate of the difference between the population mean rating forships that carry fewer than 500 passengers and the population mean rating for shipsthat carry 500 or more passengers?

Q: c. Find the p-value. Round to 4 decimals. p-value = d. Make a decision. O Fail to reject the null…

A: Given : Mean : x1 = 46.9x2 = 36.2 standard deviation : σ1 = 12.4σ2 = 15.3 Sample size : n1 = 124n2 =…

Q: Suppose that the distribution of touchdowns (in football) is normally distributed with a mean of 250…

A: Consider that the mean and standard deviation of a random variable X are µ and σ, respectively.…

Q: What is the standard deviation of 32, 21, 17, 38 and 6.

A:

Q: The average McDonald's restaurant generates $3.6 million in sales each year with a standard…

A: For the MacDonald's restaurant the following information is provided. Average μ=3.6  Standard…

Q: The height of trees in a nursery is normally distributed with a mean of 56.4 inches and a standard…

A: The height of trees in a nursery is normally distributed with a mean of 56.4 inches and a standard…

Q: oby's Trucking Company determined that on an annual basis, the distance traveled per truck is…

A:

Q: The mean annual income for people in a certain city (in thousands of dollars) is 42, with a standard…

A: The formula for mean of the Z-score is, Z=x¯-μσn Here n is the sample size, μ is the population mean…

Q: Two different species of trees have heights that are approximately normal in distribution.  Tree A…

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: The distribution of the weights of dogs at a local rescue shelter is Normal, with a mean of 38…

A:

Q: lies

A: Let X be the random variable such that the  daily water usage per person in Quezon City. The daily…

Q: The average McDonald's restaurant generates $2 million in sales each year with a standard deviation…

A: Sample  (x) (x-x̄)2 1 2.6 0.1089 2 3.2 0.8649 3 2.2 0.0049 4 2.6 0.1089 5 2.2 0.0049 6…

Q: Women's height are normally distributed with a mean of 63.7 inches and a standard deviation of 2.9.…

A:

Q: An economist would like to estimate the mean amount of money that a family spends to within $45. If…

A: GivenMargin of Error(E)-45standard deviation(σ)=190α=1-0.93=0.07α2=0.035zα2=1.8119      (from z…

Q: If the heights of intramural college basketball players are normally distributed with mean u =…

A: Given,μ=70σ=6.5P(63.5<X<76.5)=?

Q: The heights of women in a particular community are normally distributed with a mean of 65 inches and…

A: We have to find given proportion..

Q: The National Center for Health Statistics reported that the mean total cholesterol level in 2002 for…

A:

Q: The heights of adult men in America are normally distributed, with a mean of 69.3 inches and a…

A: Let "x" be the height of women

Q: The lengths of pregnancies in a small rural village are normally distributed with a mean of 262 days…

A: Let "X" be the lengths of pregnancies in a small rural village in days.

Q: high temperatures in Chicago during the month of October have a mean of 64 degreesand a standard…

A: A z-score is known as the standard score that determines how much the data point deviates from the…

Q: Assume that the heights of women are normally distributed with a mean of 65.4 inches and a standard…

A: We have given that  Mean=μ=65.4 Standard deviation=σ=2.7 X~Normal(μ=65.4,σ=2.7)

Q: The heights of adult men in America are normally distributed, with a mean of 69.2 inches and a…

A: Given, The heights of adult men in America are normally distributed, with a mean of 69.2 inches and…

Q: Define "Standard Deviation" and also Find out the Standard Deviation of the given data: 86, 37, 21,…

A: Definition: Standard deviation is a measure of the amount of variation or dispersion of a set of…

Q: Lightbulbs are measured in lumens (light output), watts (energy use), and hours (life). A standard…

A: Given:-            Standard white light bulb mean = 675 hours…

Q: Suppose that another sample of resting heart rates for five Math students was obtained: 72, 68, 66,…

A: From the given data we want to know the data value .

Q: Sketch the distribution of heights. What percentage of students are over 73.38 inches tall? What…

A: “Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: The stature of men is normally distributed, with a mean of 69.0 inches and a standard deviation of…

A: From the given information, the mean of women is 63.6 inches and standard deviation is 2.5 inches.…

Q: percent of men meeting these height requirements.

A: Assume that the heights of American men are normally distributed with a mean of 69.0 inches and a…

Q: The fuel efficiency of cars currently registered in the Commonwealth of Virginia is normally…

A: X follows a Normal distribution with mean = 24 and S.D = 6 Then z=(x-mean)/SD = (x-24)/6  follows…

Q: A pediatrician obtains the heights of her 200 three-year-old female patients. The heights are…

A: The given mean is 37.8 and the standard deviation is 3.14.

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: An economist wants to find out if there is difference in the monthly expenses of families from…

A:

Q: A researcher gathered data on five randomly selected individuals from a data set. The ages are 25,…

A: The data set of ages is25,27,20,21,29sample size(n)=5

Q: The average McDonald's restaurant generates $3.1 million in sales each year with a standard…

A: The random variable sales generated by McDonald’s restaurants in Maryland follow normal…

Q: A student earned a 79 on a precalculus exam, and she earned a 92 on a statistics exam. The…

A: Answer:- Given, The precalculus exam had a mean score (µ) =72.3 with a standard deviation (σ) = 8.4.…

Q: The U.S. Center for Disease Control reports that in year 1900, the mean life expectancy is 47.6…

A: White:Sample size Sample mean Sample standard deviation Non-whites:Sample size Sample mean Sample…

Q: standardized test has a pop. mean of 152 and a standard deviation of 16. What would be the median…

A: Given that Mean=M=152, Standard Deviation=Sd=16 X~N(M=152,Sd=16)

Q: A sample of data is given as below:3, 5, 7. What is the standard deviation

A: The formula for sample standard deviation is,

Q: A researcher collected data from Boston police officers and found that on average they spent 14.3…

A:

Q: The heights of men aged 20 to 29 are normally distributed with a mean of 69.2 inches and a standard…

A: we have given that, the heights of men aged 20 to 20 are normally distributed with mean (mu) =69.2…

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.