1) Assume the gas mileage for a car is normally distributed with a mean of 20.0 miles per gallon and a standard deviation of 10 miles per gallon. a       What is the probability that a randomly selected car gets 30 miles or less per gallon?  Round answer to 3 decimal places. b        What is the probability that a randomly selected car gets between 10 and 30 miles per gallon? Round answer to 3 decimal places c        Seventy five percent of the time a randomly selected car will get how many miles per gallons or less?   Round answer to 2 decimal places.

Q: 1. The iPhone battery capacity is normally distributed with a mean of 4 years and a standard…

A: 1 year = 12 months Given: μ = 484 years = 48 months σ = 1010 (a) The corresponding z-value…

Q: he reading speed of second grade students in a large city is approximately​ normal, with a mean of…

A:

Q: 1.The average length of adult rabbit is 30 cm with the standard deviation of 4 cm. If their length…

A: Given : Let X : Length of adult rabbit is normally distributed with Mean (μ) = 30  (in cm) Standard…

Q: 5. Suppose that it takes a nurse at the Chimney Rock Hospital in North Carolina on average 13.7…

A: Given: Mean μ=13.7 minutes Standard deviation σ=3.4

Q: 8. The reading speed of sixth-grade students is approximately normal, with a mean speed of 135 words…

A:

Q: A patient visits her doctor with concerns about her blood pressure. If the systolic blood pressure…

A: Let y be a random variable responding a single measurement on blood pressure of a patient.

Q: (a) What is the probability that a randomly selected cylindrical metal bar has a length longer than…

A: here mean = 11 cm standard deviation = 0.25 cm X= length of cylindrical metal bar

Q: 14. The golf scores for a school team were normally distributed with a mean of 68 and a standard…

A:

Q: hotel in a European city follows a normal distribution with a mean of 170 euros and a standard…

A:

Q: 2. A radar unit is used to measure speeds of cars on a motorway. The speeds are normally distributed…

A: Let X be the radar unit  X~N(mean μ=90, standard deviations σ=10) P(X>100)=?  Note: this…

Q: What is the probability that a randomly selected individual with an MBA degree will get a starting…

A: Given:  Let x be the starting salary of individual from normal distribution with mean u= $40000 and…

Q: he number of chocolate chips in an​ 18-ounce bag of chocolate chip cookies is approximately normally…

A: Note: Please repost part d as i can answer only 3 subparts as per my policy. Given data,μ=1252σ=129

Q: The Economic Policy Institute periodically issues reports on wages of entry level workers. The…

A: From the given data: Standard deviation for male = $2.30 Standard deviation for female = $2.05

Q: 10. An education finance corporation claims that the average credit card debts carried by…

A:

Q: A sports shop selects a random sample and records the sales of items made in China and those made in…

A: Standard Error is given by, s.e.(xchina) = σchinan So, here σchina =std. deviation for china = 9.75n…

Q: Q/The speed of a file transfer from a company server to any employee personal  computer is normally…

A:

Q: 2.) A ski gondola in Vail, Colorado that carries skiers up a mountain bears a plaque stating that…

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

Q: The bank of American issues Visa and MasterCard credit cards. It is known that the balances on all…

A: Given information Mean µ = $756 Standard deviation  σ = $210 a) Probability that a randomly selected…

Q: A web site reported in 2018 that 47% of all web traffic comes from laptops and desktops. Based on a…

A:

Q: The mean cholesterol levels of women age 45-59 in Ghana, Nigeria, and Seychelles is 5.1 mmol/l and…

A: Given, The mean cholesterol levels of women age 45-59 in Ghana, Nigeria, and Seychelles is 5.1…

Q: If 35% of cows in a herd have Mad Cow disease, and a rancher randomly selects 7 cows, what is the…

A: Note : - As there are two different question, As per our policy we can answer only one question at a…

Q: 3. The average cholesterol content of a certain canned goods is 215 milligrams, and the standard…

A: Given that  X~N(μ= 215 , σ= 15 ) μ= 215 , σ= 15 , n= 25

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

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Q: Take, for example, the assumption that the speeds of cars on a specific length of highway are…

A:

Q: In its Fuel Economy Guide, the Environmental Protection Agency gives a variety of data on 2016 model…

A: Note: Hey, since there are multiple subparts are posted, we will answer first three subparts for…

Q: 1) The time until recharge for a battery in a smartphone is normally distributed with a mean of 250…

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

Q: The Economic Policy Institute periodically issues reports on wages of entry level workers. The…

A: a) The probability that a sample of 50 male graduates will provide a sample mean within $0.50 of the…

Q: 2. The line width for semiconductor manufacturing is assumed to be normally distributed with a mean…

A:

Q: 1. The weights of deer in a national park are normally distributed with a mean of 65 kilograms and a…

A: Given that, the weights of deer in a national park are normally distributed with a mean of 65…

Q: A manufacturer of 8-watt LED downlights has past data that shows the lifespan of the downlight is…

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

Q: The mean gas mileage for a hybrid car is 56 miles per gallon. Suppose that the gasoline mileage is…

A: It is given that the gas mileage for a hybrid car is normally distributed mean 56 and standard…

Q: What is the probability that a transistor of this type will last at most 50 weeks? b. What is the…

A: Let , X→N(μ=40 , σ=5) Our aim id to find the following :  a. What is the probability that a…

Q: The shape of the distribution of the time required to get an oil change at a 15-minute oil-change…

A: Central Limit Theorem for mean: If a random sample of size n is taken from a population having mean…

Q: The Economic Policy Institute periodically issues reports on worker’s wages. The institute reported…

A: Note: Since you have posted a question with multiple subparts, we will solve the first three…

Q: If the grades on a statistics test are normally distributed with a mean of 80 and a standard…

A: The probability is equal to the area under the curve of normal distribution. So the probability that…

Q: 1. Suppose the height of a tomato plant follows a normal distribution with a mean of 74.5…

A:

Q: (25) The distribution of average speeds of the top 53 drivers in NASCAR is roughly symmetric,…

A: (a) Draw the normal curve with the values from Z=–3 to Z=3

Q: Assuming that student incomes from employment in industry during the day are normally distributed…

A:

Q: Suppose that the distribution of typing speed in words per minute (wpm) for experienced typists…

A: Given information: μ=64, σ=16 a)  x = 64 By applying normal distribution:- z=x-μσ=64-6416=0 z = 0.0…

Q: Assume the number of physical damage losses for houses as a result of hurricane Irma in Barbuda is…

A:

Q: Suppose that scores on the ACT Math exam for high school seniors are normally distributed with mean…

A:

Q: A mechanic a brand of automobile tire that has a expectancy that is normally distributedwith a mean…

A: Let X be the random variable for the expectancy. X is normally distributed with a mean of 28,000…

Q: Charlotte, North Carolina has a mean annual rainfall of 43 inches, with a standard deviation of 4.2…

A: Solution: Given data Mean(μ) = 43 inches Standard deviation(s) = 4.3 inches Amount of rainfall  is…

Q: According to government data, the probability that a woman between the ages of 25 and 29 was never…

A: Let X be the random variable of number of women that never married Given n=10 p=0.4 X ~ Binomial(10,…

Q: What is the probability that a randomly selected carton has a weight greater than 9.13 ​ounces? ​(b)…

A: Let X denote the weights of ice cream cartons. Given that X follows N(mean = 9, SD = 0.5), then  Z =…

Q: The Aluminum Association reports that the average American uses 56.8 pounds of aluminum in a year. A…

A: It is given that the mean is 56.8 and standard deviation is 12.3.

Q: A technical assistance service with electronic equipment has that its service time is normally…

A: Given,mean(μ)=80standard deviation(σ)=25

Q: c. What is the probability that exactly ten of the 45 luxury cars sold are silver? d. What is the…

A: It is given that n=45 and p=0.191.

Q: The Aluminum Association reports that the average American uses 56.8 pounds of aluminum in a year. A…

A: (a) Obtain the probability that the sample mean is more than 60 pounds. The probability that the…

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.