The downtime per day for a certain computing facility averages 4.0 hours, with a standard deviation of 0.8 hours. a. Find the probability that the average daily downtime for a period of 30 days is between 1 and 5 hours. b. Find the probability that the total downtime for the 30 days is

Q: Which of the following is an appropriate way to interpret a coefficient on a continuous independent…

A: The answer to the above question are as follows :

Q: A population has a mean of u = 50 and a standard deviation of σ = 20. Would a score of X = 70 be…

A: From the given information ,Mean = 50 We have to determine , if would a score of X=70 be considered…

Q: Find the p-value as a range using Appendix D. (Round your left-tailed test answers to 3 decimal…

A: We need to find the p-value for the given t  and d.f.

Q: Suppose that the average reading speed of students completing a speed-reading course is 500 words…

A: Let X be the random variable from normal distribution with mean (μ) = 500 and standard deviation…

Q: A population has a mean of u = 50, and a standard deviation of  a = 10. a] If 3 points were added to…

A: a.Let X be the scores of the population. If 3 is added to every score the new values will be X…

Q: A population has a standard deviation σ of 20 units. (Give your answers correct to two decimal…

A:

Q: Assume that women's heights are normally distributed with a mean given by u = 64. 1 in. , and a…

A:

Q: Assume that adults have IQ scores that are normally distributed with a mean of μ = 105 and a…

A: According to the given information in this question We need to find the following probability

Q: A data set consists of 2m2 − 1 zeros, one −m, and one m. a. Compute x and s for this data set. b.…

A: a. The values of mean and standard deviation for the data set is,

Q: If given X, and n, we can find the standard deviation of X. The standard deviation of X must always…

A: Some statements are given. To determine if a statement is true or false.

Q: A simple random sample of size n is drawn from a population that is normally distributed. The sample…

A: Sample mean Sample standard deviation

Q: A fire department in a rural county reports that it's response time to fires is approximately…

A: According our policy we can answer only first question for remaining please repost the question.

Q: Given that x = 28, n = 42, and o = 4, then we can be 95% confident that the true mean,μ, lies…

A: given data, x¯=28n=42σ=4CI=0.95α=1-0.95=0.05here σ is unknown so we use z - distribution

Q: The probability that a randomly selected adult has an IQ less than 128 is (Type an integer or…

A: Given:  Consider X as a random variable that follows a normal distribution with mean 22 and…

Q: Suppose the scores on an exam have a mean of 60 with a standard deviation of 10. If one student has…

A: Given,mean(μ)=60standard deviation(σ)=10

Q: A laboratory kit states that the standard deviation of its results can be expected to vary with σ =…

A: The formula for standard error of the mean is, SE = σ/√n, where σ is the standard deviation and n is…

Q: Let X be normally distributed with mean u=128 and standard deviation o= 24. [You may find it useful…

A: let x be normally distributed with mean =128 and standard deviation =24

Q: che readings at freezing on a batch of thermometers are normally distributed with a mea. D°C and a…

A: Given mean of 0 and standard deviation of 1. μ=0σ=1

Q: A population has a mean of m 5 50 and a standard deviation of s 5 10. a. If 3 points were added to…

A: Population: A population is the entire group that you want to draw conclusions about. Mean: The mean…

Q: An IQ test is designed so that the mean is 100 and the standard deviation is 10 for the population…

A:

Q: Assume that​ women's heights are normally distributed with a mean given by μ=62.3 in​,  and a…

A:

Q: A variable of two populations has a mean of 40 and a standard deviation of 20 for one of the…

A: The data is given as- μ1=40,σ1=20,n1=25μ2=40,σ2=12,n2=16

Q: For A-D: A certain breed of pigs has weights that are normally distributed with a population mean of…

A: Given,mean(μ)=350standard deviation(σ)=25

Q: Several sociology students are unprepared for a surprise true/false test with 30 questions, and all…

A: Reviewing information, Surprise true-false test of 30 questions

Q: A random sample of size n1 =15 is selected from a normal population with a mean of 76 and standard…

A: Given that Pop 1 - n = 15 , mean =76 , s.d = 9 Pop 2 - n = 10 , mean =71 , s.d = 13 Find ( a ) P (…

Q: K Claim The standard deviation of pulse rates of adult males is less than 10 bpm. For a random…

A: given data claim  in words : the standard deviation of pulse rates of adult males is less than 10…

Q: A sample from a normal population with u=50 and o =6 has a mean of M =48.20.If the sample mean…

A: Given,mean(μ)=50standard deviation(σ)=6sample mean(M)=48.20z-score =-1.50

Q: A very bright student is described as having an IQ that is three standard deviations above the mean.…

A: Given information- We have given that a very bright student has an IQ that is three standard…

Q: solve for t.

A: here given ,  A group of faculty members at a local university agreed that the average annual salary…

Q: Solve the following using the Central Limit Theorem. Round to 4 decimal places A study of the amount…

A:

Q: A manufacturer makes thousands of ballpoint pens per day, and estimates that 3% are defective and…

A: Given : A manufacturer makes thousands of ballpoint pens per day, and estimates that 3% are…

Q: the top 15% of the scores on the test? Carry your intermediate computations to at least four decimal…

A: Given Mean=130 Standard deviation=15

Q: The incubation time for a breed of chicks is normally distributed with a mean of 24 days and…

A: a)   Determine the number of chicks expected to hatch in the time period 20 to 28 days.   The number…

Q: Assume that X is normally distributed with a mean of 3 and a standard deviation of 4. Determine the…

A: Given that mean =3 ,s.d =4

Q: FOR EACH PROBLEM BELOW, a) formulate the null and alternative hypotheses; b) Determine what test…

A: Given that  Hypothesized Population Mean (\mu)(μ) = 60006000 Sample Standard Deviation (s)(s) =…