Majesty Video Production Inc. wants the mean length of its advertisements to be 26 seconds. Assume the distribution of ad length follows the normal distribution with a population standard deviation of 2 seconds. Suppose we select a sample of 14 ads produced by Majesty.   What can we say about the shape of the distribution of the sample mean What is the standard error of the mean time? What percent of the sample means will be greater than 27.25 seconds? What percent of the sample means will be greater than 24.50 seconds? What percent of the sample means will be greater than 24.50 but less than 27.25 seconds?

Q: An education researcher has been studying test anxiety using a particular measure, which she…

A:

Q: A vending machine is designed to dispense a mean of 7.6 oz of coffee into an 8-oz cup. If the…

A: Given X is normal Distributed with mean µ = 7.6 and standard deviation σ = 0.2 now will using…

Q: students has a mean age of 15.8 years with a standard deviation of 0.6 years. The ages are normally…

A:

Q: What is the corresponding Z- score, mean is 110, standard deviation is 8 and x is 90

A: In question, We'll find the Z - score for mean 110, standard deviation 8 and x = 90. The solution is…

Q: The U.S. Department of Transportation provides the number of miles that residents of the 75 largest…

A:

Q: Dr. Samwell Tarly wants to estimate the number of books checked out of the library in the past year.…

A: It is given that the mean is 10,000 and the standard deviation is 10.

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 distribution of the cost of a family’s dine-out meal has a mean of $55.30 and a standard…

A: Given ,Mean μ=$55.30Standard deviation σ=$4.00

Q: Assume that the mathematics scores on the SAT are normally distributed with a mean of 500 and a…

A:

Q: Let us suppose that the amount of bread consumed by adult Americans per day can be modeled by a…

A: Given: Mean(μ)  = 32 oz Standard deviation (σ) = 13.3 oz

Q: A normally distributed set of data has been generated where 50% of the data lies below 97 and 70%…

A:

Q: Do the data support your claim at the 1% level?

A: The summary of the statistics is, The type of test is right tailed test

Q: If a distribution has a mean of 50 and a standard deviation of 5, what value would be -1 standard…

A: Given, μ=50σ=5z=-1x=?

Q: Suppose that the average length of American songs is 245 seconds with a standard deviation of 28…

A: Solution: Let X be the length of American songs. From the given information, X has mean µ=245…

Q: The department of public safety has an old memo stating that the number of accidents per week at a…

A: From the provided information, Sample size (n) = 52 Sample mean (x̅) = 2 Population standard…

Q: If the probability of defective bolt is 0.1, find the mean and the standard deviation for the number…

A: Given the probability of a defective bolt is, 0.1 That is, p=0.1 The total number of bolts is, n=400…

Q: Assume that the mathematics scores on the SAT are normally distributed with a mean of 500 and a…

A: Topic- Probability

Q: The principal decided that the top 30% of the class with the highest grades in statistics will be…

A:

Q: If the mean is 8, then the mean absolute deviation of the scores 10 9 3 8 10 is?

A: Given mean (μ) = 8 Then Mean Absolute Deviation is given by  1n∑xi-μ

Q: The heights of adult men in America are normally distributed, with a mean of 69.1 inches and a…

A:

Q: A university dean of students wishes to estimate the average number of hours students wish to spend…

A: The formula for the sample size is as follows:

Q: When Christian runs the 400 meter dash, his finishing times are normally distributed with a mean of…

A:

Q: Suppose the scores of students on a Statistics course are Normally distributed with a mean of 440…

A:

Q: If research samples 28 college students and wants to compare the sample mean of 8 to the population…

A: From the provided information, Sample size (n) = 28 Sample mean (x̄) = 8 Population mean (µ) = 12…

Q: Suppose that you are conducting a survey on how many students have blue eyes in each first period…

A: Given: Number of students having blue eyes = X  Mean of X = 6 standard deviation of X = 2 .

Q: The weekly mean income of a group of executives is $1,000 and the standard deviation of this group…

A:

Q: Companies who design furniture for elementary school classrooms produce a variety of sizes for…

A:

Q: If the true mean is .9560 with a standard deviation of .0020 what is the sampling distribution of X

A: if the true mean is 0.9560 with a standard deviation of 0.0020 i.e.  μ=0.9560  and σ = 0.0020

Q: The distribution of the number of hours people spend at work per day is unimodal and symmetric with…

A: Solution-: Given: μ=8hours,σ=0.7hours We find, (a) If Saba’s z-score for his work hours was −1.3 ,…

Q: If mean is 20 and standard deviation is 5, what value of x contain the lowest 20% of the…

A: Solution

Q: If the true mean is 9590 with the standard deviation of 0.0080 within what interval will 98% of…

A: Given that , True mean = 9590 Standard Deviation = 0.0080

Q: It is given that a vending machine dispenses a mean of 7.6 ounces with a standard deviation of 0.4…

A: Given: Mean = 7.6  Standard deviation =  0.4 oz

Q: The prices of all college textbooks follow a bell-shaped distribution with a mean of $108 and a…

A: HERE GIVEN FOR BELL SHAPED DISTRIBUTION  MEAN=$108 S.D=$21

Q: The systolic blood pressure (given in millimeters) of males has an approximately normal distribution…

A:

Q: The U.S. Department of Transportation provides the number of miles that residents of the 75 largest…

A: confidence interval is a part of interval estimation. Interval estimation gives the value of the…

Q: Professor Brown administered an achievement test, which as he remembers from years of experience,…

A: Given: Population mean score(μ)=85 Sample mean(X¯)=89 Sample standard deviation(s)=14 n: no of…

Q: A quantitative data set has a size 50. At least how many observations lie within 3 standard…

A: Suppose X is a random variable with expectation, μ and standard deviation, σ. Then, for any positive…

Q: It is known that the mean is 65 and the standard deviation is 10. There are 30 students in the…

A:

Q: The scores of 800 students in a 100-item exam resemble a normal distribution with a mean of 78 and a…

A: Let X be the random variable from Normal distribution with mean (µ) = 78, standard deviation (σ) = 8…

Q: A computer scientist estimates that the proportion of users that properly back up their data is p =…

A: Given data,n=380 usersp=0.304Find the mean and standard deviation of sample proportion?

Q: Jonathan, a college business student wants to study how many pages of notes fellow classmates took…

A:

Q: The distribution of scores on the SAT is approximately normal with a mean of μ = 500 and a standard…

A: Note: Please repost part d as i can answer only 3 subparts as per my policy. Given dataμ=500σ=100

Q: The mean ACT score for 43 male high school students is 21.1 and the standard deviation is 5.0. The…

A: From the given output use the p-value to make your conclusion.

Q: Is a measure of 29 inches "far away" from a mean of 19 inches? As someone with knowledge of…

A: The number of standard deviation 29 inchs far away from the mean is: Thus, 29 inches is 5 standard…

Q: how far from the mean in terms of the standard deviation are the following height of the students?

A: here given, The average height of the students in Ms. Joan’s class is 130 cm. Assuming that the…

Q: The mean for data set is 59, the standard deviation is 4, and the z- score is 0.03, what is the raw…

A: Here given that the mean =59, standard deviation=4, z score=0.04, we need to find the raw score x.

Q: A sociologist found that in a sample of 45 retired men, the average number of jobs they had during…

A: Given : population mean ,u = 7.2  population standard deviation,σ = 2.3

Q: A study of commuting times reports the travel times to work of a random sample of 1068 employed…

A: Given data,  x = 54.0  s = 60.9 minutes n=1068 standard error of the mean=?

Q: there are 75 students in the class and 20 students are getting a+ grade in the class find the mean…

A:

Q: According to the Department of Education the mean number of hours college students spend studying…

A: Given, mean(μ)=28standard deviation(σ)=6 Let x=no.of hours of study

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.