A population has parameters �=169.2 and �=89.3. You intend to draw a random sample of size �=77.What is the mean of the distribution of sample means?��¯= What is the standard deviation of the distribution of sample means?(Report answer accurate to 2 decimal places.)��¯=

Q: The standard deviation of the mean is less than the sample standard deviation because it estimates…

A: Given that True or False  The standard deviation of the mean is less than the sample standard…

Q: 29. The standard deviation of a variable is 15. If a sample of 100 individuals is selected, what…

A: Since you have posted more than one question, we are answering the first question as per our rule.…

Q: A mandatory competency test for high school sophomores has a normal distribution with a mean of…

A: Suppose a random variable X, defines the scores in competency test for high school sophomores.

Q: College students average 7.8 hours of sleep per night with a standard deviation of 40 minutes. If…

A:

Q: College students average 7.4 hours of sleep per night with a standard deviation of 45 minutes. If…

A: Given data  college students average 7.4 hrs of sleep with standard deviation of 45mins

Q: difficult exam has a normal distribution with a mean of 50 and a standard deviation of 10. Find the…

A: #  Here given that        X~Nμ,σ  and        z=x-μσ→                    1 So according to equation…

Q: A variable x is normally distributed in a population with mean u and standard deviation o. The…

A: The standard error of the mean of a simple random sample of size 100 chose from the population is…

Q: Suppose that IQ scores have a bell shaped distribution with a mean of 101 and a standard deviation…

A: The IQ scores have a bell shaped distribution with a mean of 101 and a standard deviation of 17.

Q: on jan 15 the temperature is 4 degre standar deviation above the mean what is temperature on jan 15

A: Given that Mean temperature = 16 And SD = 0.5 Let x denote the temperature on Jan 15.

Q: The distribution of room and board expenses per year at a four-year college is normally distributed…

A: We want to find z score  If Z Value lie outside (-3, 3) then it will be unusual.

Q: We want to compare cholesterol levels between men and women, so we collect a sample of 20 women and…

A: From the given information,

Q: The variance of a sample of 99 observations equals 81. The standard deviation of the sample equals?

A: From the provided information, The sample variance of 99 observations (s2) = 81

Q: please very soon full explanation.  The amount of time that it takes to complete a statistic exam…

A: The sample standard deviation (s) is equal to the standard deviation of the population σ divided by…

Q: In a normal distribution, mean is 60 and standard deviation is 5. How many of the cases have scores…

A: The probability between two specific numbers a and b in a normal distribution with mean μ and…

Q: IQ is normally distributed with a mean of 100 and a standard deviation of 15. What IQ do you need to…

A: IQ is normally distributed with a mean of 100 and a standard deviation of 15.

Q: mandatory competency test for high school sophomores has a normal distribution with a mean of  425…

A: Given that.   X~N( μ , ?)   μ=425     , ?=83   Z-score =( x - μ )/?

Q: A mandatory competency test for high school sophomores has a normal distribution with a mean of 495…

A:

Q: ominic would want to estimate the mean of a population which is normally distributed. The standard…

A:

Q: Adult men have heights with a mean of 69.0 inches and a standard deviation of 2.8 inches. Find the…

A: Z= x-μσ

Q: what percent of values fall between 5.25 and 8.75 if the mean =7 and standard deviation =1.75

A: Mean=7 Standard deviations=1.75

Q: The mean IQ is 100 and the standard deviation is 15. What percentage of people fall between the IQs…

A: given  data, μ=100σ=15we have to find out the percentage of people

Q: The distribution will be approximately a normal curve with mean_____and standard deviation_____ .

A: It is given that Mean = 104 And SD = 18 Sample size n = 100

Q: You have a data set with mean = 40 and standard deviation = 3. What can you say about the percentage…

A: Given  μ=mean=40, sd=σ=3 P(32<X<40)= ?  Note: this probability value calculated from standard…

Q: When a distribution is bell-shaped, approximately what percentage of data values fall within 1…

A: We know that, the empirical rule which is also known as 68-95-99.7 rule.  The Empirical Rule finds…

Q: Suppose the round-trip airfare between Boston and Orlando follows the normal probability…

A: Step 1: Given informationMean = $387.20Standard deviation = $68.50The distribution used is normal…

Q: Scores of on a math test were normally distributed with a mean of 82 and a standard deviation of 6.…

A: The importance of standard normal curve lies in the fact that one has not to tabulate probability…

Q: The height of men in the United states fits with a normal distribution with a mean of 70 inches and…

A:

Q: Q/ Find the following data (6, 8, 5 2, 4, 3, 7, 9) 1. Range. 2. Average absolute deviation. 3.…

A:

Q: Please help me understand the problem. Is the given standard deviations 6, and 7? I know I need to…

A: Based on the provided information, the known values are: Population mean, μ=7Population standard…