The distribution of average wait times in drive-through restaurant lines in one town was approximately normal with mean u = 185 seconds and standard deviation o = 11 seconds. A journalist wrote an article about the restaurants whose average drive-through wait times were in the top 25% for that town.

Q: The physical plant at the main campus of a large state university receives daily requests to replace…

A: We want to find the probability (%) P(49<X<79)= ?  X~N(μ=49,σ2=102)

Q: Assuming cholesterol data indicated a mean total cholesterol level for adult persons 20 years of age…

A: The probability that a randomly selected sample of 25 adults will have a mean level < 180  is…

Q: If a sample has a mean of 250 and a standard deviation of 15, what is the value in the data set that…

A:

Q: The weight of oranges growing in an orchard is normally distributed with a mean weight of 8 oz. and…

A: Given that, μ=8 ozσ=1 Then, P7<x<9 Then, by the empirical rule solve as,…

Q: The number of plants pollinated by bees follows a normal distribution with a mean of 6,543 plants…

A:

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

A:

Q: Suppose the platelet count of such patients with dengue fever follows a normal distribution with a…

A: Suppose the platelet count of such patients with dengue fever follows a normal distribution with a…

Q: If a sample has a mean of 100 and a standard deviation of 6, what is the value in the data set that…

A:

Q: According to the data from the National Health Survey, the height of all adult American women are…

A: The score is calculated below:

Q: The total cholesterol levels of a sample of men aged 35-44 are normally distributed with a mean of…

A: Given:μ=219 and σ=36.6Sample size = n = 247We have to find how many would you expect to have a total…

Q: The waist girth of 2,500 employees in a large company follows the normal distribution with mean of…

A:

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

A: Mean(μ)=500 Standard deviation(σ)=100 The objective is to find the min. SAT score needed to be…

Q: If the average mid twenties male weighs 169lbs. and a weight of 150 is in the 31st. percentile, what…

A: We are given,Mean = μ = 169X = 150Percentile = 31st

Q: According to a recent survey, the population distribution of number of years of  education for…

A: What is the standard error of mean?

Q: A normally distributed variable has a mean of 75 and a standard deviation of 2. What is the z-score…

A: The z-score for 69 is obtained below: From the given information, the value of mean is 75 and…

Q: A random sample of 26 psychology graduates scored an average of 458 on the GRE advanced psychology…

A: From the provided information, Sample size (n) = 26 Sample mean (x̅) = 458 Sample standard deviation…

Q: In an agricultural study, the average amount of corn yield is normally distributed with a mean of…

A: Given :- In an agricultural study, the average amount of corn yield is normally distributed with a…

Q: Assume the speed of vehicles along an open stretch of a certain highway in Texas that is not heavily…

A: It is given that mean is 71 and standard deviation is 3.125.

Q: When Brooklyn commutes to work, the amount of time it takes her to arrive is normally distributed…

A: Given that.   X~N( μ , ?^2 )   μ=54     , ?=4   Z-score =( x - μ )/?

Q: At the 0.05 level of significance, is there evidence that the mean life is different from 375hours?

A: Here sample size n =64 Population standard deviation = 100 hours Sample mean = 350 hours Here claim…

Q: For a population with a standard deviation of 20, what is the zscore corresponding to a score that…

A: The population standard deviation is 20. The z-score corresponding to a score that is 5 points below…

Q: The credit card balances on 1,000 accounts at the Jefferson Valley Bank have a mean of $760 and a…

A: mean = 760 s = 120 n = 1000

Q: The mean speed of a sample of vehicles along a stretch of highway is 64 miles per​ hour, with a…

A: Given, μ=64σ=4P(52<X<76)=?

Q: A candy store sells about 8 million pieces of candy per day with a standard deviation of 300,000…

A: Given : Let X : Number candy that they sell in a given day           μ = 8 million i.e   Mean (μ) =…

Q: The physical plant at the main campus of a large state university receives daily requests to replace…

A: Given, The distribution of the number of daily requests is bell shaped with mean of 52 and standard…

Q: The scores on a marketing exam were normally distributed with a mean of 67 and a standard deviation…

A: Given data normally distributed with mean (μ) =67, standard deviation (σ) =9.Let ‘X’ be a normal…

Q: If a golfer hit drives a golf ball with a mean of 180 yards and a standard deviation of 20 yards,…

A: We have given that  A golfer hit drives a golf ball with a mean of 180 yards and a standard…

Q: A trucking company determined that the distance traveled per truck per year is normally​…

A: Given information- Mean weight of the bears, µ = 80 thousand miles Population standard deviation, σ…

Q: The mean score on the SAT in 2017 was 1060, and the standard deviation was 195. Assume the scores…

A: Given,  Mean μ=1060  Standard deviation σ=195Let x be score of a randomly selected person

Q: The fuel efficiency of cars currently registered in the Commonwealth of Virginia is normally…

A: X follows a Normal distribution with mean = 24 and S.D = 6 Then z=(x-mean)/SD = (x-24)/6  follows…

Q: The physical plant at the main campus of a large state university receives daily requests to replace…

A: We want to find the probability by using emperical rule

Q: The students of a large university in Luzon were studied regarding their hours of sleep at night.…

A: Given Information :  The students of a large university in Luzon were studied regarding their hours…

Q: The amount of money raised by Clayton State teams for the Statistics Games is normally distributed,…

A: Chebyshev's theorem and empirical rule are used to calculate the percentages of data lies within…

Q: The department has decided that all marks from introductory psychology courses should be reported…

A: Here For two different  Distribution Comparison we will Use Standardized statics (Z)..

Q: If the weekly grocery expenditure of households in a certain urban market is known to be normally…

A:

Q: A pipes manufacturer makes pipes with a length that is supposed to be 10 inches. A quality control…

A: The sample size is 39, sample mean is 10.05, sample standard deviation is 0.28. It is clear that the…

Q: A trucking company determined that the distance traveled per truck per year is normally​…

A: Solution-: Let, X= The distance traveled per truck per year Given: We find, P[ either less than…

Q: The students of a large university in Luzon were studied regarding their hours of sleep at night.…

A: As the distribution of the hours of sleep can be modeled as normal distribution with mean μ of 6.9…

Q: A study found that the mean migration distance of the green turtle was 2200 kilometers and the…

A:

Q: What is the z-score of a value of 27, given a set mean of 24, and a standard deviation of 2?

A:

Q: A highway study of 8000 vehicles that passed by a checkpoint found that their speeds were normally…

A:

Q: The number of text messages that teenagers send per month is normally distributed with a mean of…

A: We have given that  X~N(mu,sigma ^2) mu=3400,sigma =450 and X=4415 Z-socre =(X-mu)/sigma

Q: The average wage for bank managers in a certain city is $91,900 per hour with a standard deviation…

A: Given that  X~N( μ = 91900 , ? = 24300) μ = 91900 , ? = 24300 Z-score =( x - μ )/?

Q: The weight of male contestants is normally distributed with a mean of 96 kg pounds and a standard…

A:

Q: In a population of 100 male fruit flies, the mean abdomen length is 2.0 mm and the standard…

A: Given μ=2 and σ=0.3     Use standardization asz=x-μσ

Q: The number of cell phone minutes used by staff of DIT at Bowie State University follows a normal…

A: We have, X= The number of cell phone minutes used by staff of DIT at Bowie State university. Mean=…

Q: The daily sales at a convenience store have a mean of $1280 and a standard deviation of

A: As given, the daily sales at a convenience store have a mean of $1280 and a standard deviation of…

Q: Interpret the ­z-score of 1.45 in terms of its relationship to standard deviation as well as the…

A: Solution: From the given information, z=1.45.

Q: If the foot length of women follows a normal distribution and 95% of women have a foot length…

A: Given data: If the foot length of women follows a normal distribution 95% of women have a foot…

Q: If a raw score is 28 in a distribution in which the mean is 20 and the standard deviation is 2, what…

A: Given information- Population mean, µ = 20 Population standard deviation, σ = 2 We have to find 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.