A normal population with unknown variance has a mean of 20. Is one likely to obtain a random sample of size 9 from this population with a mean of 24 and a standard deviation of 4.1? If not, what conclusion would you draw? Explain. On your answer sheet give an explaaation yes no

Q: In a recent year, the scores for the reading portion of a test were normally distributed, with a…

A: Mean is 20.4 and the standard deviation is 6.5.

Q: A population has a standard deviation of 25 and a mean of 300. Given a random sample of size 100,…

A:

Q: During my office hours (from 12pm to 6pm), an average of about 1 student per hour comes in for help.…

A: Given, During my office hours (from 12pm to 6pm), an average of about 1 student per hour comes in…

Q: The shape of the distribution of the time required to get an oil change at a 20-minute oil-change…

A: Given :  The shape of the distribution of the time required to get an oil change at a 20-minute…

Q: Es On their website, a property management company states that the mean monthly rent for apartments…

A: As per bartleby guideline expert have to answer first three subparts only dear student please upload…

Q: In response to the increasing weights of passengers, in 2003 the Federal Aviation Administration…

A:

Q: A pharmaceutical company claims that a drug is effective in treating 90% of people having severe…

A: It is given that the random variable follows a binomial distribution with n=6 and p=0.9.

Q: True or False: If the amount of gasoline purchased per car at a large service station has a…

A: It is given that the mean and standard deviation are 15 and 4, respectively.

Q: A population has a standard deviation of 18. On average, how much differece should exist for a…

A:

Q: A random sample of 25 observations yield a mean of 106 and a standard deviation of 12. Find the…

A: From the given information,Sample size 25, mean 106 and standard deviation 12

Q: aluminum rivets produced by rivets forever, inc. are believed to have shearing strengths that are…

A: From the provided information, Mean (µ) = 13.75 Standard deviation (σ) = 2.4 X~N (13.75, 2.4)

Q: A research article claims that the mean cost of raising a child from birth to age 2 in a rural area…

A: Given : population mean is $10460

Q: In a large city it was found that summer electricity bills for single-family homes followed a normal…

A: The use of standard normal probability distribution tables helps us in ascertaining the percentage…

Q: The operation manager at a tire manufacturing company believes that the mean mileage of a tire is…

A: The sampling distribution of sample mean follows the normal distribution, if the population is…

Q: According to a Survey, households in the city X spend an average of $24 per week on their leisure…

A:

Q: 16) A normal population has a mean of 70 and a standard deviation of 5. What is the probability that…

A: The mean and standard deviation are 70 and 5.

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

A: By central limit theorem, the distribution of sample mean follows a Normal distribution if the…

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

A: (a) Sampling distribution of sample mean: If the population is normally distributed then the…

Q: Suppose math scores on the SAT are normally distributed with a mean of 500 and a standard deviation…

A:

Q: In a plant nursery, the owner thinks that the lengths of seedlings in a box sprayed with a new kind…

A: Given: n=80x¯=20μ0=26σ=10α=0.05

Q: The amount of rain falling in Waimea Canyon State Park, Kauai is normally distributed with a mean of…

A: Let x¯ is defined as the mean rain of 16 randomly picked days which follows normal distribution. The…

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

A: Givenmean(μ)=29standard deviation(σ)=4sample size(n)=64

Q: York Corporation manufactures an Al car that requires three AA batteries. The mean life of these…

A:

Q: The senior Class of 2012 at Rancho High strongly believesthat they have better grades than their…

A: The paired t-test is used when: the sample sizes are equal. two samples are independent but the…

Q: For a population of leghorn chickens, the mean number of eggs laid per chicken is 7.3 with standard…

A: Given information: μlegborn=7.3σlegborn=1.7μsussex=5σsussex=0.85 Two independent ransom samples of…

Q: The mean age at first marriage in the U.S. is 28. A random sample of 626 married residents of New…

A:

Q: he manufacturer of cans of salmon that are supposed to have a net weight of 6 ounces tells you that…

A:

Q: Suppose that we have a normal population with mean 7 and standard deviation 4.   What is the…

A: From the provided information, Mean (µ) = 7 Standard deviation (σ) = 4 Sample size (n) = 6

Q: The amount of rain falling in Waimea Canyon State Park, Kauai is normally distributed with a mean of…

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 shape of the distribution of the time required to get an oil change at a 10-minute oil-change…

A:

Q: The shape of the distribution of the time required to get an oil change at a 20-minute oil-change…

A: The mean is 21.1 and the standard deviation is 3.7.

Q: The shape of the distribution of the time required to get an oil change at a 10​-minute ​oil-change…

A: Given Mean time=11.3 minutes standard deviation=3.4 minutes (a) According to the CL Theorem, the…

Q: A forester studying the effects of fertilization on certain pine forests in the Southeast is…

A: Probability : Probability is a field of mathematics that deals with numerical descriptions of how…

Q: At the 0.10 level of significance, can it be concluded that this represents a difference from the…

A: Given that Sample size n = 50 Sample mean = 9.2 Population SD = 3.2 Level of significance = 0.10

Q: use a one sample z-test to determine whether or not a sample mean of 34 differs from the population…

A:

Q: a) What is the probability a randomly selected student will read more than 88 WPM?  b)What is the…

A: Answer: Given that the reading speed of second grade students is approximately normal mean = μ = 83…

Q: During my office hours (from 12pm to 6 pm), an average of about 1 student per hour comes in for…

A: Solution: Let X represents the number of student per hour comes in office for help .  The random…

Q: Suppose the variance of a sample is 7.3. Find the standard deviation. Round to two decimals.

A: Given : Variance , s2 = 7.3

Q: A medical investigation claims that the average number of infections per week at a hospital is 13.7.…

A:

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

A:

Q: 5. Statewide, the population as a whole watches 6.2 hours of TV per day. A random sample of 1017…

A:

Q: After deducting grants based on need, the average cost to attend the University of…

A:

Q: An obstetrician read that a newborn baby loses on average 7 ounces in the first two days of his or…

A:

Q: The average operating life of a popular brand of tablets is know to be 2000 days, with a standard…

A: Comment: As per the our company guidelines we are supposed to answer only three subparts. Kindly…

Q: Suppose a batch of metal shafts produced in a manufacturing company have a standara deviation of 1…

A: From the provided information, Mean (µ) = 201 inches Standard deviation (σ) = 1 X~N (201, 1)

Q: Suppose the variance of a sample is 5.7. Find the standard deviation. Round to two decimals.

A: According to the given information, we have Variance = 5.7

Q: For a normal distribution with a mean of 160 and a standard deviation of 10, what are the values…

A: Solution

Q: Steel bolts have a mean diameter of 128 millimeters, and a standard deviation of 5 millimeters. If…

A: Z=x¯-μσn~N(0,1)

Q: Suppose the weights of seventh-graders at a certain school vary according to a Normal distribution,…

A: From the given information,   Suppose the weights of seventh-graders at a certain school vary…