Suppose the commuting time on a particular train is uniformly distributed between 34 and 54 minutes. What is the mean commuting time?

Q: Compute the mean and standard deviation of the distribution in #5

A: X P(X) x P(X) x2P(X) 1 1 1 1 1.5 2 3 4.5 2 3 6 12 2.5 4 10 25 3 5 15 45 3.5 6 21 73.5…

Q: when samples drawn from a population, which is positively distributed, with replacement and sample…

A: From the given information, Consider, X be the random variable which is positive distributed.…

Q: ii, 20 coins are flipped each with a probability of 0.5 that it will be heads. What is the standard…

A:

Q: When something occurs "naturally", meaning without manipulation of any kind, and it results in a…

A: Unimodal Distribution: It is a distribution having only one peak. Where the values in the…

Q: Suppose the number of students in a class for the Business Statistics program at a University has a…

A: Given Mean=23 Standard deviations=4.3 n=15

Q: 2. The principal of the school claims that the main age of tne teachers is 48 years. The mean age of…

A:

Q: Suppose that 42% of students of a high school play video games at least once a month. The computer…

A: Solution: Given information: N= 792  Population  size  n= 30 Sample size  p^=0.40 Sample proportion…

Q: Compute the standard deviation of sample taking if the size of a sample is 200 and the proportion on…

A:

Q: Suppose that the talk time on the Apple iPhone is approximately normally distributed with mean 7…

A: Solution: 7. Let X be the talk time on the Apple iPhone. From the given information, X follows…

Q: Suppose the grades in a finite mathematics class are Normally distributed with a mean of 75 and a…

A:

Q: A normal quantile graph is created by breaking the data into different sections based on the…

A: In statistics, a normal quantile plot has a very important role to play. It is mainly used to make…

Q: Suppose that a population is known to be normally distributed with mean = 2,000 and standard…

A: GivenMean(μ)=2000stanadard deviation(σ)=230sample size(n)=16

Q: Construct a binomial distribution graph for the number of defective computer chips in a lot of 4 if…

A: Given, The number of defective computer chips in a lot of 4 if p=0.3 Binomial distribution:…

Q: In sampling a large number of parts manufactured by a machine, the mean number of defective in a…

A: Givensample size(n)=20probability…

Q: Suppose you repeatedly draw samples of size 100 and calculate their mean. Applying the central limit…

A: Sampling distribution of sample mean: If the population is normally distributed then the sampling…

Q: In a certain communications system, there is an average of 1 transmission error per 10 seconds. Let…

A: It is given that there is an average of 1 transmission error per 10 seconds. Since, in 10 seconds, 1…

Q: .In sampling a large number of electronic chips manufactured by a machine, the mean number of…

A: First we have to find the probability of atleast 3

Q: The average age of all employees is 25 years, and the standard deviation of the ages of all…

A: Given,sample size(n)=100mean(μ)=25standard deviation(σ)=3

Q: Suppose that in a large class, the instructor announces that the average grade on an exam is 75.…

A: According to the definition of estimation, a sample mean is equal to the population mean.

Q: Under what circumstances is it impossible to construct a coincidence interval for the population…

A: Answer :A normal population with a small sample size and an unknown population variance We know…

Q: Suppose that we randomly select a sample of 80 measurements from an infinite population having a…

A: 1) Given: Mean μ=30 Standard deviation σ=5 Sample size n=80

Q: What is the mean of the average waiting time of 65 passengers?

A: HERE given , Bus waiting time is uniformly distributed with the shortest and the longest waiting…

Q: results in a unimodal distribution it is called

A: Natural: The things which are coming from nature directly. Unimodal: The Statistical Distribution…

Q: Use a normal approximation to find the probability of the indicated number of voters. In this​ case,…

A: The given information is that the sample of 144 eligible voters’ ages 18-24 years are randomly…

Q: If repeated random samples of size 50 are taken from an infinite population, the distribution of…

A: Central limit theorem:   If the size of the samples taken from the population are sufficiently…

Q: Suppose the average time spent driving for drivers age 20 to 24 is 25 minutes and you randomly…

A: It is given that mean and standard deviation are 25 and 1.5, respectively.By using central limit…

Q: 8. For the date 4, 16, 20, 24, 38,57,59,60,60,74, compute the 10% trimmed mean.

A: Given data :  4,16,20,24,38,57,59,60,60,74 n = 10

Q: Regarding the estimate of the conditional standard deviation, s, which of the three sums of squares…

A: Estimate of the conditional standard deviation:The estimate of the conditional standard deviation…

Q: A researcher would like to investigate if the distribution of the number of babies born is uniform…

A: Given Information: The researcher wishes to investigate if the distribution of the number of babies…

Q: ppose that two very large companies (A and B) each select random samples of their employees. Company…

A: From above option

Q: Suppose that, according to a recent census, the income per capita measured in U.S. dollars was…

A: The per capita income in country A is $41716. The per capita income in country B is $44871. The…

Q: The central limit theorem states that when sample size isn> 30, then the distribution of sample…

A: CLT: For a r.v having probability distribution either it is known or unknown with population mean μ…

Q: Suppose we have a random sample of size 36 from a Poisson distribution with mean 20. Find the…

A: From the given information, Consider, X is the random variable that follows Poisson distribution…

Q: Suppose that the sampling distribution of size 10 has a mean of 30 and standard deviation of 3.…

A:

Q: 1 out of every 10 fish have blue on them. If you were to take a random sample of 60 fish, what is…

A: Let X denote the number of blue fish out of n = 60 fish. Let p denote the probability of getting…

Q: Find the standard deviation for the set of numbers. 10, 14, 10, 11, 5, 10, 5, 17, 12, 19

A:

Q: Prove that for any discrete distribution standard deviation is not less than mean deviation from…

A:

Q: What is the probability that more than 4 accidents will occur within any given year at an…

A:

Q: A. A fair coin is flipped 5 times, what is the probability of resulting in exactly 2 heads and 3…

A:

Q: Suppose collection of all quiz marks of a class of students is normally distributed with a mean of 7…

A: It is given that the marks follow a normal distribution with mean 7 and standard deviation 1. Denote…

Q: Then, compute the mean M for the new sample (round to one decimal).

A: The mean for the new sample is, Mean=∑xn=0+2+1+0+6+1+0+28=128=1.5

Q: 6. The following scores are the ages for a random sample of n = 30 drivers who were issued speeding…

A:

Q: Suppose the teenagers that attend public high schools get an average of 5.7 hours of sleep each…

A: Mean service life is 5.7 and a standard deviation is 1.7.  Sample size 35.

Q: As a part of the productivity assessment at a company, the HR manager carried out a survey and found…

A: Given thatμ=35 hoursσ2= 4 hoursσ=2

Q: What is the Central Limit Theorem? It is always true that as the sample size, n, increases, the…

A: According to Central limit Theorem , if the sample is chosen randomly , distribution of sample means…