A population of score has μ  = 44. in this population, a score of X = 40 corresponds to z = -0.50. What is the population standard deviation?

Q: Scores on the Critical Reading part of the SAT exam in a recent year were roughly Normal with mean…

A:

Q: The mean wingspan of a sample of 31 birds of a particular species is 30 inches.  The standard…

A: Sample size n =31 Sample mean=30 Population standard deviation =4

Q: On average, indoor cats live to 16 years old with a standard deviation of 2.6 years. Suppose that…

A: The Z-score of a random variable X is defined as follows: Z = (X – µ)/σ. Here, µ and σ are the mean…

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: The percent of fat calories that a person consumes each day is normally distributed with a mean of…

A: The mean percent of fat calories that a person consumes each day μ= 35 Standard deviation σ = 10…

Q: A manufacturer of light bulbs finds that one light bulb model has a mean life span of 1025 h with a…

A: Mean = 1025 Standard deviation = 85 Raw score = 950

Q: From 1776-1800, the average age of first marriage for a male in Western Europe was 26.4 years, with…

A: The question is about normal distributionGiven :Average age of first marriage for males ( ) = 26.4…

Q: A sample has a mean M = 55. For the sample, the standard deviation is ? = 12 and the score…

A:

Q: The weights of men in their 30s are normally distributed with a mean of 190 pounds and a standard…

A: From the provided information, Population mean (µ) = 190 pounds Population standard deviation (σ) =…

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

A: Given: Formula:

Q: The human population has a mean IQ score of µ = 100 and a standard deviation of σ = 15. Find the…

A: From the given information, µ = 100 and σ = 15.

Q: A basketball player has a scoring average of 0.325 each week of the season, with a standard…

A: Given: μ=0.325σ=0.065

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

A: The Z-score: The Z-score of a random variable, X, with mean μ and standard deviation σ, at the point…

Q: Assume that adults have IQ scores that are normally distributed with μ=38 and a standard deviation…

A:

Q: The life of a 9-volt battery is normally distributed with a mean of U = 2000 hours and a standard…

A: Percentiles: If the elements in the data set are arranged in ascending order of magnitude, then the…

Q: The scores on a mathematics exam have a mean of 71and a standard deviation of 8. Find the x-value…

A: Let X denote the scores on a mathematics exam and it follows normal distribution with mean of…

Q: When we compute a standard deviation, we are trying to get a measure of the average distance of…

A: Let us understand better by assuming X1, X2, ...., Xn be n data points. Then,…

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

A: Assume that adults have IQ scores that are normally distributed with μ=105 and a standard deviation…

Q: The data has a mean of 27 and a standard deviation of 3.8, rounded to the nearest tenth. How many of…

A: Given that  a data has a mean μ = 27                                  standard…

Q: a. What is the difference between carrier's highest data speed and the mean of all 50 data speeds?…

A: Here Given  Highest Speed measured=76.6 Mbps Sample Size=50 Sample mean=x¯=18.68 Sample sd= s= 37.17…

Q: The scores on the Accuplacer test and High School GPAs are normally distributed. The Accuplacer test…

A: The distirbutions of the Accuplacer test and High School GPAs are given.

Q: A distribution of values is normal with a mean of 141.6 and a standard deviation of 44. Find P65,…

A: Given Information: Mean μ=141.6 Standard deviation σ=44 To find Percentile P65: Using a standard…

Q: A variable is normally distributed with a mean of 100 and a standard deviation of 10. A student…

A: From the given information,   Mean = 100 Standard deviation = 10

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

A: Given that the height of the man (x) = 65.6

Q: A manufacturer of light bulbs finds that one light bulb model has a mean life span of 1026 h with a…

A: Given :- A manufacturer of light bulbs finds that one light bulb model has a mean life span of 1026…

Q: The mean difference equals 1.2, the standard deviation of the difference equals 1.5, and n equals…

A: It is given that mean difference is 1.2, the standard deviation of the difference is 1.5 and the…

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: The population mean of happiness is 5.382, with a standard deviation of 1.138. Linda has a z score…

A: We have given that,  Let X be a random variable following normal distribution with mean (Mu) = 5.382…

Q: Red pens come with a certain amount of dye #2 from the factory. The average pen needs approximately…

A:

Q: The scores on the Accuplacer test and High School GPAs are normally distributed. The Accuplacer test…

A: The mean of the Accuplacer test, The standard deviation of the Accuplacer test, The mean of the High…

Q: A random sample of men's weights have a sample mean of x¯=182.3 pounds and sample standard deviation…

A:

Q: In a survey, the mean weight of 1005 rats was calculated to be 132 gr. The standard deviation of the…

A:

Q: The human population has a mean IQ score of µ = 100 and a standard deviation of σ = 15. Find the…

A: The normal distribution is the most useful theoretical distribution for continuous variables.…

Q: the mean is 146, and standard deviation is 35. A score of 181 is how many z-scores above the mean?

A:

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.