Suppose the area that can be painted using a single can of spray paint is slightly variable and follows a nearly normal distribution with a mean of 25 square feet and a standard deviation of 3 square feet. a) What is the probability that the area covered by a can of spray paint is more than 27 square feet?

Q: Suppose that a distribution of 400 items has mean 130 and standard deviation 5. Find the​ z-score of…

A: Given that.   X~N( μ , ?)   μ=130     , ?=5  , x=143   Z-score =( x - μ )/?

Q: Assume that the total cholesterol levels for adults are normally distributed with mean cholesterol…

A: Given data: Mean =  51.8 mg/dL Standard deviation  = 14.3 mg/dL To find: Find the probability that…

Q: The cholesterol levels of young women aged 20 to 34 have an approximate Normal distribution with…

A: Given: μ=185σ=40middle 68% of the choesterol levels would be between ?

Q: The spread or dispersion of a set of data about the mean will be large if the standard deviation is…

A: Solution

Q: the golf scres for a team were normally distributed with a mean of 95 and a standard deviation of 6.…

A: We have find givan normal distribution..

Q: The p-value… is used to determine the Margin Of Error measures the number of standard deviations…

A: p value is a probabilty  which indicates the decision about null hypothesis assuming true  so that…

Q: Under what conditions can the mean of the sample be treated as a value that is from a population…

A: From the above data  under what conditions can the mean of the sample be treated as a value that is…

Q: The Law Enforcement Management and Administrative Statistics (LEMAS) survey reports that the mean…

A: Mean=1.99s=0.84

Q: how much will the probability that the students are aged above 15 years old change?

A:

Q: or a distribution, the mean is 100 and the standard deviation is 4.  If a data value x has a value…

A: Given data,Mean μ=100sd σ=4If x=90z=?

Q: The average cholesterol content of a certain brand of eggs is 225 milligrams, and the standard…

A:

Q: The standard deviation may not be greater than the mean. O True O False

A: False: standard deviations may be greater than mean  example: random variable x follow standard…

Q: Assume thAt scores on a standardized test are known to follow a bell shaped distribution with a mean…

A: L

Q: what is the approximate number of students taking the exam?

A: given: Grades follow Normal with u= 75 and σ= 8 12 students got more than 90.…

Q: A normal distribution has a mean of mu = 80 with o = 20. What score separates the lowest 30% of the…

A:

Q: Let X = { 1,2,6,9,11}. Find the mean and standard deviation given that X is a sample. %3!

A: The mean for the sample is calculated as follows:

Q: Find the probability that mean of sample size 36 will be negative.

A:

Q: The center of a normal curve is the mean of the distribution. O is the standard deviation. O cannot…

A: Answer  The center of a normal curve is the mean of the distribution. It is a bell-shaped curve.…

Q: Suppose that the distance of fly balls hit to the outfield (in baseball) is normally distributed…

A:

Q: Exhibit 6-5 The weight of items produced by a machine is normally distributed with a mean of 8…

A: Given that  Mean = 8 Standard deviation = 2 Find P(X = 8 )

Q: The mean and standard deviation of the sampling distribution of the mean is shown as?

A:

Q: The average number of pounds of red meat a person consumes each year is 196 with a standard…

A: We are given,μ = 196σ = 22n = 60

Q: In testing for the differences between the means of two independent populations, you assume that the…

A: In testing for the differences between the meanings of two independent populations, we assume that…

Q: Assume that people playing World of Warcraft in a week has a normal distribution with a mean of 54…

A: This question requires us to use the normal distribution to calculate the probability of a randomly…

Q: The weekly demand for Baked Lay's potato chips at a certain Subway sandwich shop is a normally…

A: The question is about normal distribution.Given :Population mean weekly demand (  ) = 450Population…

Q: Let X = number of miles a family travels for summer vacation. X follows a normal distribution with a…

A: From the given information,X follows a normal distribution with a mean of 311 miles and standard…

Q: The heights of students are normally distributed with mean 161 inches and standard deviation of 4.56…

A: From the provided information, Mean (µ) = 161 Standard deviation (σ) = 4.56 X~N (161, 4.56)

Q: The net weight of a can of salmon is a random variable with a mean of 6.21 ounces and a standard…

A: Solution

Q: Suppose that iQ scores have a bell shaped distribution with a mean of 103 and a standard devation of…

A: Given: μ=103 and σ=13.   Now, to find where the lowest 32% of IQ scores lie:PZ<z=0.32 Look for…

Q: A normal distribution has a mean of 100 and a standard deviation of 2. If 69,146% of the data are…

A:

Q: The weights of the fish in a certain lake are normally distributed with a mean of 11 lbs. and a…

A: From the provided information, Mean (µ) = 11 Standard deviation (σ) = 12 X~N (11, 12) Here X be a…

Q: The critical value for assessing the difference between two proportions at the 0.05 level, or .025…

A: Given: The critical value for assessing the difference between two proportions at the 0.05 level, or…

Q: Data from the Bureau of Labor Statistics’ Consumer Expenditure Survey show that annual expenditures…

A: Given information- For the year 2001- Population mean, µ = $235 Population standard deviation, σ =…

Q: A population of scores has u=55 and o=15.  if 5 points are subtracted from every score in the…

A: The given data is μ = 55σ = 15 Suppose x1, x2, x3, x4, ..., xn are the data points…

Q: For a positively skewed distribution with a mean = 20, What is the most probable value of the…

A:

Q: A set of final examination grades in an Introductory Statistics course is normally distributed with…

A: We have given that,  X be the test score with mean (μ) = 73 and standard deviation (σ) = 8 and The…

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.