A local chain of coffee shops is collecting data on the time each customer spends in line before placing an order. The frequency of each number of minutes spent waiting in line is given in a histogram for each of the four coffee shops. II IV In which coffee shop is the standard deviation of time spend waiting in line the smallest?

Q: alculate the standard deviation of the following sample table of frequencies:  Round your answer to…

A: X f fx fx^2 1 5 5 5 2 3 6 12 4 2 8 32 8 2 16 128

Q: Assume that the amounts of weight that male college students gain during their freshman year are…

A: Given : Let X : Amount of weight that male college students gain during their freshman  X~N(μ=1.4 ,…

Q: A standard I.Q. test produces normally distributec 13 with a mean of 104 and a standard deviation of…

A:

Q: The average time it takes a certain brand of ibuprofen to start working is 25 minutes, with a…

A: The mean of the sampling distribution of the sample mean is represented as and is given by

Q: The batteries from a certain manufacturer have a mean lifetime of 850 hours, with a standard…

A: According to the given information, we have Mean = 850 hours Standard deviation = 90 hours

Q: A survey of 1000 women ages 20 to 30 found that their heights were normally distributed, with a mean…

A: (a) From the given information The mean is 65 in. and a standard deviation is 2.5 in. The mean x¯ of…

Q: The following BMI scores measured in 12 patients who are free of diabetes and participated in a…

A:

Q: To see if young men ages 8-17 years spend a different amount than the national average of $24.44 per…

A: Solution: Let X be the amount spent per trip. From the given information, x-bar = $23.37, S= $3.70…

Q: Steel rods are manufactured with a mean length of 27 centimeter​ (cm). Because of variability in the…

A: Given Data Population Mean,μ = 27.0 Population Standard Deviation,σ = 0.06

Q: The students in an AFDA class have a mean height of 66 inches and a standard deviation of 7 inches.…

A: Mean(µ) = 66Standard deviations (σ) = 7

Q: In a mango farm of 250 trees, the mean harvest is 96.5 kilos of fruit per tree with a standard…

A: Given,sample size(n)=250mean(μ)=96.5standard deviation(σ)=8.4

Q: The height of adult men in the United States is normally distributed with a mean of 70 inches and a…

A: Z = -0.67 Mu = 70 S = 3

Q: The diameters of watermelons at a local supermarket are normally distributed with a mean of 10…

A: Let X denote diameters of watermelons at a local supermarket. Given that X follows Normal(mean = 10,…

Q: A particular battery claims to have a mean life of 400 hours with a standard deviation of 30 hours.…

A: Mu=400, sigma=30 P(X>420)= ?

Q: The batteries from a certain manufacturer have a mean lifetime of 830 hours, with a standard…

A: (a)   Determine approximate percentage of the batteries have lifetimes between 690 hours and 970…

Q: A midterm exam has a mean of 76.0 and a standard deviation of 8.0. If any student with a z-score of…

A:

Q: Find a 95% CI on the population standard deviation of speeds of drivers ticketed in a 55 mph zone…

A: Confidence interval population standard deviation :  A confidence interval is an statistical…

Q: The batteries from a certain manufacturer have a mean lifetime of 810 hours, with a standard…

A: Given,Mean(μ)=810Standard deviation(σ)=90By using Empirical rules :1)…

Q: Steel rods are manufactured with a mean length of 27 centimeter​ (cm). Because of variability in the…

A: Given,mean(μ)=27standard deviation(σ)=0.06

Q: A certain machine makes electrical resistors having a mean resistance of 40 ohms and a standard…

A: Let X be the normal random variable representing the resistance of an electrical resistors, is…

Q: The batteries from a certain manufacturer have a mean lifetime of 820 hours, with a standard…

A:

Q: A data set of home sales prices in an area has an average selling price of $350,000 with a standard…

A: The z score for x = 390000 is calculated as:

Q: A major credit card company has determined that the amount its customers charge on their accounts is…

A: Given that, Mean = 2800 Standard deviation = 200 Number of customers = 20000

Q: Determine whether each statement below is true or false. About 68% of the data lies within one…

A: To determine whether the given statement is true or false.

Q: A store sells meat in smallmedium and large size packages. The small packages have a mean weight of…

A: Here given that, Mean, mu= 1 And standard deviation, sigma= 0.1 Z score is given by, Z score=…

Q: In a factory producing glasses, the weights of glasses are known to have a mean of 160 grams. It is…

A: By looking at a Z table we can conclude that Q1 and Q3 are each .6745 standard deviations from the…

Q: Find the range and standard deviation for the data items in the histogram below. 5 4 Frequency

A: From the histogram, The frequency table is, Data Frequency 10-20 2 20-30 5 30-40 5 40-50…

Q: A store sells meat in small, medium and large size packages . The small packages have a mean weight…

A: Given that small packages have a mean weight of 1 pound and a standard deviation of 0.1 pound. i.e.…

Q: A manufacturer of light bulbs finds that one light bulb model has a mean life span of 1022 h with a…

A: Standard normal distribution: The standard normal distribution is a special case of normal…

Q: To see if young men ages 8-17 years spend a different amount than the national average of $24.44 per…

A: Givensample size(n)=35standard deviation(s)=3.70Mean(x)=23.37α=0.05

Q: а. How many of the women have a height that is within 1 standard deviation of the mean? b. How many…

A:

Q: Most exhibition shows open in the morning and close in the late evening. A study of Saturday arrival…

A: From the provided information, Mean (µ) = 2 hours and 2 minutes or 122 minutes Standard deviation…

Q: 1.D.G co. has an average gross sales of 37 million per week from their products in all outlets with…

A: Given Pop mean, μ=37Pop sd, σ=6Sample size, n=32Sample mean, x¯=34α=0.05

Q: The results of a national survey showed that on average, adults sleep 6.9 hours per night.Suppose…

A:

Q: On a construction site, the amount of dirt scooped by a forklift machine is normally distributed…

A:

Q: ccording to a survey on part-time workers, the average base salary for women in sales is higher than…

A: Let X denotes the average base salary for men  Given: = $2500/month Converting it to 12 moth period,…

Q: In a class of twenty-five 15-year old girls the average height is M = 62.60 inches. The national…

A: Givensample size(n)=25Mean(μ)=63.80standard deviation(s)=2.66M=62.60

Q: de . Find the standard deviation of the observations 5, 11, 18, 25 and 41, using muill

A:

Q: A group of eight college students were asked how many hours they slept the previous night. The…

A: MINITAB Procedure:Step1: Choose Stat > Basic Statistics > Display Descriptive…

Q: A survey of 1000 women ages 20 to 30 found that their heights were normally distributed, with a mean…

A: (a) From the given information The mean is 65 in. and a standard deviation is 2.5 in. The mean x¯ of…

Q: The following data give the speeds (in kilometer) as measured by radar of 5 selected cars traveled…

A: The data shows the speeds (in kilometer) as measured by radar of 5 selected cars traveled at NLEX.

Q: A person in the U.S. eats about 25 pounds of M&M's per year with a standard deviation of 3 pounds.…

A: Solution: Given  μ= 25 Pounds  Population meanσ= 3 Pounds Population standard deviations Assumed…

Q: As an electrical engineer, you have designed a new efficient light bulb. In order to predict its…

A: Formula  Used: Mean X = ∑FX∑F Standard deviation = ∑FX2-nX2∑F-1

Q: A major credit card company has determined that the amount its customers charge on their accounts is…

A: (15) Obtain the proportion of customers charge more than R2750 per month on their account. The…

Q: Q2:The mean time taken by all participations to run a road race was found to be 200 minutes with a…

A: Chebyshev's theorem: At least 75% of the observations are lies between two standard deviations,…

Q: Q2) A certain machine makes electrical resistors having a mean resistance of 60 ohms and a standard…

A: Given information: μ=60, σ=2

Q: The selling price of a new car is normally distributed with an average of $19110 and a standard…

A: Let X denotes a selling price of a new car. Here, X follows normal distribution with mean value of…

Q: A local chain of coffee shops is collecting data on the time each customer spends in line before…

A: It is an important part of statistics. It is widely used.

Q: .The mean annual incomes of certified welders are normally distributed with the mean of $50,000 and…

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.