The average time a person spends in a museum follows a normal distribution with ?=88 minutes and a variance of 16 min. These parameters are taken from a survey conducted to the visitors of the museum in a particular day. Suppose a sample consisting 9 visitors is selected, what is the probability that the average time these visitors spent in the museum is between 87 and 92 min?

Q: The amount of time it takes students to complete a biology exam is normally distributed with a…

A: Given that, The random variable X is the amount of time takes students to complete a biology exam It…

Q: Suppose the mean income of firms in the industry for a year is 100 million dollars with a standard…

A: Given,mean(μ)=100Standard deviation(σ)=15

Q: A psychologist obtains a random sample of 20 mothers in the first trimester of their pregnancy. The…

A: Denote μ as the true mean IQ of children at 5 years of age, whose mothers played Mozart for at least…

Q: The average weight of the leatherback sea turtle is 880 lbs with a standard deviation of 44 lbs.…

A: Given  Mean=μ=880, standard deviation=σ=44  P(X>1000)=?  Nahi te: According to Bartleby…

Q: Suppose the scores on a statistics exam follow a normal distribution with a mean of 70 and a…

A: GivenMean(μ)=70standard deviation(σ)=10

Q: Does the data provide sufficient evidence to conclude that the true mean number of sales at location…

A: Given, For location A; n1=18 x1¯=39 s1= 8 For location B; n2=13 x2¯= 49 s2= 4 Significance level, α…

Q: Q5. Talk times of cellphones are described by the normal distribution with mean time 24 hours and…

A: X= Talk time on cell phone.Population mean :μ=24hoursStandard deviation :σ2=2σ=2Here we need, P (…

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

A:

Q: Ava's morning routine is normally distributed and independent. She has been tracking her time from…

A: Given information: Ava has been tracking her time from when she leaves the house to when she returns…

Q: Suppose​ 18% of​ movie-goers say that horror is their favorite movie genre. If a random sample of…

A: Obtain the mean number of movie-goers that prefer horror movie genre. The mean number of movie-goers…

Q: A survey was taken among the freshman at our college to find out how many hours a week they spent…

A: It is given that the mean and standard deviation are 30 and 10, respectively.

Q: The term "Freshman 15" refers to the claim that college students typically gain 15 lb during their…

A: Let X be the random variable denoting that the amounts of weight that male college students gain…

Q: The mean time for a group of adults to complete a certain achievement test is 38.8 minutes and the…

A:

Q: Suppose that Sacramento workers have a mean commute of 17 minutes and commute times are normally…

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Q: unts of weight that male college students gain during their freshman year are normally distributed…

A: Given that.   X~N( μ , ?^2 )   μ=2.3     , ?=10.2   Z-score =( x - μ )/?

Q: If the number of dust particles in a square meter on a surface follows a Poisson distribution with a…

A:

Q: Suppose that the duration of a particular type of criminal trial is known to have a mean of 24 days…

A: Determine the distribution of ΣX.   The distribution of ΣX is determined below as follows :

Q: A random sample of 12 second-year university students enrolled in a business statistics course was…

A: Solution: Given information: n= 12 Sample size  μ= 60 Population mean σ= 8 Population standard…

Q: A sample of n=4 has test scores of 0, 0, 12, 12 What is the range, the variance and the standard…

A: Given information- Sample size, n= 4 Given test scores are- 0, 0, 12, 12 We know that- Range =…

Q: An original population of scores with a mean = 50 and SD = 6 is standardized to create a new…

A: given data  1 represents original population 2 reperesents new distributionμ1 = 50μ2 = 80σ1 = 6σ2 =…

Q: ​Full-time college students report spending a mean of 29 hours per week on academic​ activities,…

A: From the provided information, Mean (µ) = 29 hours Standard deviation (σ) = 4 X~N (29, 4) Here X be…

Q: Suppose a batch of metal shafts produced in a manufacturing company have a variance of 6.25 and a…

A: Suppose the random variable x defines the diameter of metal shafts.

Q: Dr. Brown wants to conduct a study on 144 college age student who drink at a local bar in town. The…

A: Sampling Distribution of a Normal Variable : Given a random variable X. Suppose that the population…

Q: Fran is training for her first marathon, and she wants to know if there is a significant difference…

A: Given data,n1=40x1=46.6σ1=4.6n2=45x2=48.8σ2=2.4Compute value of test statistic?

Q: The Wechsler IQ test is normally distributed with mean 100 points and standard deviation 15 points.…

A: Solution let Xdenote Wechsler IQ test is normally distributed with mean 100 points and standard…

Q: The term "Freshman 15" refers to the claim that college students typically gain 15 lb during their…

A: To determine the probability that a randomly selected male college student gains 15 pounds or more…

Q: Suppose the heights of a certain population of people follow a normal distribution with a mean of…

A:

Q: Suppose that the distribution for total amounts spent by students vacationing for a week in Florida…

A: Answer:- Given     X ~ N(μ, σ )                      Where mean μ   = 650        &    standard…

Q: Suppose the mean income of firms in the industry for a year is 100 million dollars with a standard…

A:

Q: he number of times a customer uses an atm has an unknown distribution with mean = 7 and variance =…

A: The probability of observing a sample mean between 6.4 and 6.8 = 0.2184

Q: 9. What is the probability of selecting someone from the general population at random who would…

A: Answer:- Given , A standardized IQ test exists that possesses a normal distribution and has a mean…

Q: The average amount of sleep students get a night is normally distributed with a mean of 6.5 hours…

A: Normal distribution is also known as the Gaussian distribution . It is widely used in statistics .

Q: Suppose a paper reported that the freshman year weight gain for the students in a representative…

A:

Q: In a research study, conducted by the National Institute of Health, 25 individuals were sampled…

A: From the given information, In a research study, conducted by the National Institute of Health, 25…