he average credit card debt for public school teacher is 14,975. If the debt is normally distributed with a standard deviation of 5,650, find the probabilities: (a) that the teacher owes less than 6,740; and (b) that the teacher owes between 7500 and 19000.

Q: Suppose that a company makes light bulbs with a mean life of 310 hours, and a standard deviation of…

A: Given,  Mean μ = 310 Standard deviation σ = 47 Let x be hours a light bulb last

Q: Find the standard deviation of the first 'n'natural numbers.

A:

Q: After 6 points have been added to every score in a sample, the mean is found to be M = 70 and the…

A: 15.a.Given:New mean M=70New Standard deviation s=3Constant added=6The addition of constant value to…

Q: Karen is in her first semester at a certain university and is taking a calculus course with a large…

A: The objective of this question is to calculate the z-score of Karen's exam score and interpret it in…

Q: anic sells a brand of automobile tire that has a life expectancy that is normally distributee cee…

A: Given Mean=36000 Standard deviations=2600 Z=-1.282

Q: if we are at the unique point where the sum of all deviations equals zero, where are we?

A: If the sum of all deviations is zero in a data set, it means that the data points are perfectly…

Q: Suppose you have a test with a mean of 66 and a standard deviation of 5. If you first increase…

A: Given Mean =66 Standard deviation=5

Q: What is the difference between portfolio expected return and portfolio risk (write the formulas)?

A: Given to know about the differences between portfolio expected return and the portfolio risks.

Q: If z, and x be 2 values of a variable x and each of the remaining (n – 2) values be +), find the…

A:

Q: The dean of a business school claims that the average monthly income of his school's Bachelor of…

A: It is given that the mean is 24,700 and the standard deviation is 4,100.

Q: After a researcher adds 6 points to every score in a sample, the standard deviation is found to be s…

A: The question is about change of origin.Introduction :Change of origin :If a no. is added /…

Q: When my son was 7, he would get dressed without being asked 30% of the time.  Over a 10 day period,…

A: Solution

Q: In a population of exam scores, a score of X = 88 corresponds to z = 2 and a score of X = 79…

A: From the provided information, A score of X = 88 corresponds to z = 2 A score of X = 79 corresponds…

Q: All of the accountants at a small paper company are required to take the same accounting exam to…

A:

Q: Suppose a population is known to be normally distributed with a mean, μ, equal to 116 and a standard…

A:

Q: Determine the probability of seeing a Z score of -5.28 or one with a larger absolute value.

A: Z = -5.28 P( Z > -5.28) = 1 – P(Z < -5.28) = 1 – 0 = 1 P(Z < -5.28) = 0 (From Excel…

Q: The probability of winning a certain lottery to stay in a lodge near Antelope Valley Canyon is 1 For…

A:

Q: b) The level of radioactive contamination found in fishes at the Pacific Ocean follows an unknown…

A: Given, the level of radioactive contamination found in fishes at the Pacific Ocean follows an…

Q: The 18 red room subjects had an average solve time of 10.13 seconds with a standard deviation of…

A: Formula :

Q: The average monthly mortgage payment including principal and interest is $982 in the United States.…

A: We have to find..P(X>1225) =?

Q: anthropologist wishes to calculate the average height of men of a certain race. Assuming the…

A: Given that  Population Standard Deviation = 2.5  Sample = 100

Q: ow that a random individual will fall between 107 and 103 .if the mean IQ is 100 the standard…

A: Consider a random variable X which represents IQ of the individual.    X follows normal distribution…

Q: Suppose that an individual stock’s return is normally distributed with a mean of 10.9% and a…

A: X follows a Normal distribution with mean = 10.9 and S.D = 5.4 Then z=(x-mean)/SD = (x-10.9)/5.4…

Q: What is the mean absolute deviation of 1, 5, 8, & 10? Show your solution

A:

Q: (a) between 56 and 74. % (b) above 68. % (c) below 56. %

A: here as per guideline i have calculated 3 subparts , plz repost for remainning. Suppose that the…

Q: In what range would you expect to find the middle 95% of hate crimes per year? Between Incorrect and…

A: The random variable X is defined as the number of Hate Crimes in the United States which follows…

Q: The weights of men in a certain region are normally distributed with a mean of 192 lbs., and a…

A: Given: Let μ denote the population mean of weights of men in a certain region (μ=192 lbs). Let σ…

Q: A young investment manager tells his client that the probability of making a positive return with…

A:

Q: According to Experian, the average credit score of and American adult is 722 and the standard…

A: Consider that the mean and standard deviation of a random variable X are µ and σ, respectively.…

Q: the mean IQ of tweleve year old boys in a school district is 118; the standard deviation is 18. if a…

A: Obtain the probability that the mean of the sample is greater than 120. The probability that the…

Q: A professor knows that her statistics students' final exam scores have a mean of 79 and a standard…

A:

Q: đà 6-32. The arithmetic mean and standard deviation of series of 20 items were calculated by a nt as…

A:

Q: 32 individuals from a population and the mean of the population is 120 and the standard deviation of…

A: From the central limit theorem the sample mean blood glucose level will follow normal distribution…

Q: The average price of a kilogram of ham is P1,300. Assume that the standard deviation is P150. If a…

A:

Q: Suppose that you have a set of data that has a mean of 34 and a standard deviation of 6. a) Is the…

A: Given: μ=34σ=6

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.