For a single randomly selected movie, find the probability that this movie's production cost is between 60 and 66 million dollars.  For the group of 42 movies, find the probability that the average production cost is between 60 and 66 million dollars.  Is the assumption of normal necessary? Yes or No

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A: (a)   Obtain the probability that pregnancy will last 307 days or longer. The probability that…

Q: Based on a poll, among adults who regret getting tattoos, 22% say that they were too young when they…

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Q: According to the Department of Education, 60% of college students enjoy taking Statistics. Suppose…

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Q: udents? The data below shows the results of a survey of 20 college students asking hem how many days…

A: Given Sample size = 20 Sample sum = 812 Sample mean = 40.6

Q: A student takes a multiple choice exam with 10 questions, each with four possible selections for the…

A: Given that, A student takes a multiple choice exam with 10 questions, each with four possible…

Q: he average fruit fly will lay 401 eggs into rotting fruit. A biologist wants to see if the average…

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Q: 44%  of students in a class have black hair. If 66 students are chosen at random, what is the…

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Q: Cody took his first physics exam and scored an 80. The population mean for this exam is 70, and the…

A: Solution: It is given that, Population mean, 70 Standard deviation, 5 Given that Cody took his first…

Q: The weights of steers in a herd are distributed normally. The standard deviation is 300⁢lbs and the…

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Q: At an airline company, according to the records, the mean age of pilots is 36.2 years, and the…

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Q: Carmen attends a fashion institute that has no on-campus housing. The distance she commutes between…

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Q: b. Find the probability that a randomly hit fly ball travels less than 330 feet. Round to 4 decimal…

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Q: Ted is not particularly creative. He uses the pickup line "If I could rearrange the alphabet, I'd…

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Q: A population has a mean of u = 30. If 3 points are added to each score, what is the mean for the new…

A: Given :  Mean(μ)=30 and N=3

Q: High school girls average 80 text messages daily. Assume the population standard deviation is 15…

A: Given information:

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Q: 3. A customer booking a grab ride spends an average of 45 minutes finding a driver during rush…

A: The question is about normal dist.Given :Popl. mean time (  ) = 45 minPopl. std. deviation of time (…

Q: Before the furniture store began its ad campaign, it averaged 103 customers per day. The manager is…

A: a)   Determine the type of study used.   The type of study used is “t-test for a population mean”.…

Q: The data {9, 5, 5, 9, 2} represent a random sample of the number of days absent from school for five…

A:

Q: The amount of time that people spend at Grover Hot Springs is normally distributed with a mean of 66…

A: Given : X~Nμ=66,σ=17

Q: Michelle, a telemarketer makes six phone calls per hour and is able to make a sale on 30% of these…

A: The question is about discrete probability distribution Given : No. phone call telemarketers makes…

Q: The average fruit fly will lay 420 eggs into rotting fruit. A biologist wants to see if the average…

A: From the given data: x¯=∑xn=620015=413.33s=16.6548 n=15   a) For this study, we should use…

Q: In a huge data lab in New Mexico, numbers ranging from 3-7 appear over and over again. Use the data…

A: The number of labs is 5.

Q: a. What is the distribution of ¤? ¤ - N( b. For the group of 12, find the probability that the…

A: a. The mean is 160, standard deviation is 22, and sample size is 12. The distribution of x¯ follows…

Q: A sample of 38 people are taken who who owns a red pair of shows. The std is 23 with an unlnown mean…

A: To determine the probability of making a type II error and the power, we need to know the level of…

Q: Solve the following problem and show your complete solutions. Explain your answer for better…

A: The length of time that a phone will work before it needs charging is normally distributed with mean…

Q: 6. The daily temperature in Cairns, Australia in June is normally distributed with a mean of 22.5°C…

A: Given Data: Let X be the random variable of daily temperature in Cairns X~ Normal (22.5, 4)   a)

Q: The average American gets a haircut every 44 days. Is the average smaller for college students? The…

A: Introduction: Denote μ as the true average number of days that college students get a haircut.

Q: Before the furniture store began its ad campaign, it averaged 213 customers per day. The manager is…

A: D.   Consider that μ defines the population mean number of customers.   Here, it is needed to check…

Q: The middle 95% of a group of 1000 students got scores ranging from 50 to 90 on a math test. If the…

A: Normal Distribution: Understand the properties of the normal distribution, including the mean (μ)…

Q: 1. How are the collection of all sample proportions of samples of size 172 distributed? NO 2. What…

A: Given Information: Sample size (n) = 172 studentsPopulation Proportion (p) = 0.51. The distribution…

Q: Full-time Ph.D. students receive an average of $12,837 per year. If the average salaries are…

A: Given that ; μ = $ 12837 ? = $ 1500 X = $ 17000 To find P( x < 17000) =  ? ?  P( x > 17000) =…

Q: At an airline company, according to the records, the mean age of pilots is 36.2 years, and the…

A:

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

A: It is given that the mean is 100 and standard deviation is 15.

Q: Assume that 11% of College students are left-handed. Suppose you randomly select 100 students and…

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Q: The average fruit fly will lay 375 eggs into rotting fruit. A biologist wants to see if the average…

A: Given,   Sample size = 15   The objective is to test the given claim.

Q: The proportion of a in the tail of a gold distribution can be never be more than .50 true or false

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A: Given,  One in 10 adults visited a doctor => p = 1/10 = 0.1 Sample size, n = 6 Let X is the…

Q: Let X = number of miles a family travels for summer vacation. X follows a normal distribution with a…

A:

Q: The table summarizes results from 975 pedestrian deaths that were caused by automobile accidents.…

A: Required probability is P(pedestrian was not intoxicated or driver was intoxicated)

Q: Suppose that insurance companies did a survey. They randomly surveyed 400 drivers and found that 310…

A: Given: Sample size (n) =400 Number of  drivers claimed (x) = 310

Q: ording to a study done by De Anza students, the height for Asian adult males is normally distributed…

A: GIVEN DATA, normal distribution μ=66σ=2.5X = height of the individual.p(64<X<69)=?