A sample of 200 people has a mean age of 21 with a population standard deviation (σ) of 5. Test the hypothesis that the population mean is 18.9 at α = 0.05.

Q: A population of scores has μ = 44. In this population, a score of X = 40 corresponds to z = −1.00.…

A: Where,

Q: A random sample of 85 eighth grade​ students' scores on a national mathematics assessment test has a…

A: Answer: Given, n=85 μ=275 x=284 σ=30 (a) Option E. H0:μ=275  VS  HA:μ>275(claim)

Q: nutritionist claims that the mean tuna consumption by a person is 3.1 pounds per year. A sample of…

A: From the provided information, Sample size (n) = 70 Sample mean (x̅) = 2.9 Population standard…

Q: A sample has a mean M = 55. In the sample, a score of X = 48 corresponds to z = -1.20. What is the…

A:

Q: A random sample of 85 eighth grade​ students' scores on a national mathematics assessment test has a…

A: From the provided information, Sample size (n) = 85 Sample mean (x̅) = 285 Population standard…

Q: Assume that the heights of a population of adults form a normal distribution with a mean µ =69…

A: Consider that there are 12 inches in 1 foot.The provided information is:

Q: researcher in a large university claimed that the mean health care expenses differ from the national…

A: From the given information, Consider,  μ=$1570n=50x=$1680s=$180α=0.05

Q: A nutritionist claims that the mean tuna consumption by a person is 3.1 pounds per year. A sample…

A: Solution: Let X be the tuna consumption by a person. From the given information, n=90, x-bar=2.9 and…

Q: A population of scores has μ = 80. In this population, a score of X= 92 corresponds to z = 5. what…

A: Given: μ = 80 z = 5 X= 92

Q: A random sample of 88 eighth grade​ students' scores on a national mathematics assessment test has…

A: Given Information: Sample size (n) = 88 Sample mean (x¯) = 283 Population standard deviation (σ) =…

Q: A simple random sample of 40 items resulted in a sample mean of 25. The population standard…

A: Givensample size(n)=40sample Mean(x)=25standard deviation(σ)=5

Q: is there enough evidence to support the​ administrator's claim

A: Given that  Sample size(n)= 76 Sample mean (x¯) = 283 Population standard deviation(σ) = 31 Level of…

Q: The mean number of close friends for the population freshman college students in the U.S.A. is u…

A: Solution: Let X be the waiting time. From the given information, n=25, M=6.5 and σ=1.3.

Q: A sample has a mean M = 55. In the sample, a score of X = 48 corresponds to z = -1.50. What is the…

A:

Q: A population has a mean  u=21 and standard deviation o=11 Find the z-score for a population value of…

A: Given, x = 40 μ = 21σ = 11

Q: A simple random sample of 100 observations was taken from a large population. The sample mean and…

A: According to the given information in this question We need to find standard error

Q: A nutritionist claims that the mean tuna consumption by a person is 3.6 pounds per year. A sample of…

A: Given, A nutritionist claims that the mean tuna consumption by a person is 3.6 pounds per year. A…

Q: (a) Find a 90% confidence interval for μ 1 <μ< (b) Find a 95% confidence interval for μ <μ< (c) Find…

A: The sample size is 70, the sample mean is 24.1 and the population standard deviation is 3.68.

Q: A nutritionist claims that the mean tuna consumption by a person is 3.3 pounds per year. A sample of…

A: Given,   Sample size = 70 Sample mean = 3.1 Population standard deviation = 1.14

Q: A random sample of size 25 from a population gives the sample standard deviation to be 8.5. Test the…

A: In hypothesis testing, there are always two hypotheses viz. null hypothesis and alternative…

Q: Newspaper Reading Times A survey taken several years ago found that the average time a person spent…

A: Note: Hi there! Thank you for posting the question. As there are multiple sub parts, according to…

Q: A random sample of size 25 from a popúlation gives the sample standard deviation to be 8.5. Test the…

A:

Q: a population of scores has u=44. in this population a score of x=40 corresponds to z = -1.00. What…

A: We have given that, Population mean (u) = 44, raw score of population (X) = 40 and z- score = -1. 00…

Q: A population of scores has µ=44. In this population, a score of X= 40 corresponds to z= - 0. 50.…

A:

Q: A nutritionist claims that the mean tuna consumption by a person is 6 pounds per year. A sample of…

A:

Q: Hawaiians are known to have an active lifestyle, enjoying the fresh air and natural beauty the…

A: State the appropriate hypothesis:Denote the population mean life expectancy of the US population…

Q: school administrator to declare that the mean score for the​ state's eighth graders on this exam is…

A: Given that  Sample size(n) = 84 Sample mean score (x¯) = 290 Population standard deviation (σ) = 36…

Q: A sample of size 50 will be drawn from a population with mean 76 and standard deviation 14. Find the…

A:

Q: In a population with m=60, a score of X=58 corresponds to a z-score of z=-0.50. What is the…

A:

Q: The mean body mass index (BMI) for boys age 12 is 23.6. An investigator wants to test if the BMI is…

A: The provided information are:

Q: A random sample of 100 observations from a quantitative population produced a sample mean of 28.0…

A: From the provided information, Sample size (n) = 100 Sample mean (x̄) = 28.0 Standard deviation (s)…

Q: A nutritionist claims that the mean tuna consumption by a person is 3.6 pounds per year. A sample…

A: Given that  Claim :  Mean tuna consumption by a person is 3.6 pounds per year Sample size (n) = 90…

Q: Newspaper Reading Times A survey taken several years ago found that the average time a person spent…

A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts.  In case…

Q: There ▼(Choose one) enough evidence to support the claim that there is a change in the average time…

A:

Q: A population of score has μ  = 44. in this population, a score of X = 40 corresponds to z = -0.50.…

A: