A researcher wants to estimate the average of sugar content in the drinks at ABC Restaurant during fasting month with 95% confidence level. From the previous study, it is known that the standard deviation of sugar content in the drinks is 11.2 grams. What is the suitable sample size so that the estimated sugar content from the population mean is within 5.1 grams

Q: Suppose that shoe sizes of American women have a bell-shaped distribution with a mean of 8.21 and a…

A: X~N( μ , ?)   μ=8.21 , ?=1.48   Z-score =( x - μ )/?

Q: It is known that the average weight of the products produced in a factory is 150 grams. The shape of…

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Q: A random sample of 21 Camden County College students had a mean age of 24 years, with a standard…

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Q: he number of square feet per house are normally distributed with an unknown population mean and…

A: Given information- Sample size, n = 33 Confidence level, C = 90% Significance level, α = 0.1 So,…

Q: wo companies manufacture a rubber material intended for use in an automotive application. The part…

A: Solution: Given information: n1= 25 Sample size of company 1n2= 25 Sample size of company 2x1= 22…

Q: Suppose that shoe sizes of american women have a bell shaped distribution with a mean of 8.42 and a…

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Q: Justin started working on the sales force of ECE Calls Inc. On average, she closes the contract if…

A:

Q: Since the number of samples is less than 30, shouldn't t-test be used instead

A: The distribution of weight for the hammers can be assumed to follow a Normal distribution. This…

Q: A local grocery store manager was tracking the amount of water customers purchased during the…

A: Consider that μ defines the population mean amount of water purchased by Americans.

Q: The variability of oil prices per barrel has been very stable for the past 26 weeks.  You would like…

A: State the hypotheses. That is, there is no evidence that the gas prices variability has changed.…

Q: A regulation lacrosse ball should weigh 154 grams. A company produces lacrosse balls for the PLL.…

A: Statistical hypothesis testing is an important method in inferential statistics. It is used to test…

Q: researcher was interested in the mean corn yeild for farmers in Illinois. She took an SRS of 28…

A: Given that  Margin of error =E =3.5 Population standard deviation =13.25 95% confidence level.

Q: We conduct a study to assess if there is the same variation in grades between engineering students…

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Q: A recent research study reported that the mean daily internet usage among preparatory school…

A: From the provided information, Sample size (n) = 22 Sample mean (x̄) = 125 Sample standard deviation…

Q: The claim is that for 12 AM body temperatures, the mean is \mu > 98.6 The sample size is n = 3 and…

A: Given: The researcher's claim is that for 12 AM body temperature, the mean value is greater than…

Q: A marketing group is trying to improve sales for a clothing retail store, but first they are trying…

A: It is given that  Mean, μ = 26.7 Standard deviation, σ = 3.9

Q: A coin operated drink machine was designed to discharge a mean of 9 ounces of coffee per cup. In a…

A: we have given that  sample size (n)=17   , sample mean =9.19  , and standard deviation (s)=0.28

Q: A coin operated drink machine was designed to discharge a mean of 8 ounces of coffee per cup. In a…

A: The random variable discharge follows normal distribution. We have to test whether the true mean…

Q: Using the empirical rule, what percentage of American women have shoe sizes that are no more than…

A: It is given that Mean, μ = 8.33Standard deviation, σ = 1.5

Q: A local hospital wanted to see if the claim was true and randomly sampled 25 baby's weights and…

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Q: During the filling process of a sunflower oil bottling facility, 8 milk bottles were weighed and the…

A: Given: n=8s2=10 The degrees of freedom is obtained as below: df=n-1=8-1=7 The critical value is…

Q: Brown measured his book using a different shaped ruler. He got different measurements, namely 30,…

A: Given that  Different measurements he got 30 , 35 , 29 , 33 , 32 , 28 , 28 , 35 Sum of data value =…

Q: Although, there is a population belief that herbal remedies such as ginko biloba and ginseng may…

A: a. Sample mean is given as 54, population mean is given as 50, standard deviation is given as 12 and…

Q: A farmer grows a particular type of apple which have normally distributed weights with a mean of 150…

A: Given, Mean = 150 Standard deviation = 20   The objective is to find the percentage of apples weigh…

Q: A coin operated drink machine was designed to discharge a mean of 8 ounces of coffee per cup. In a…

A: Given,   Sample size = 19 Sample mean = 7.9 Sample standard deviation = 0.17

Q: quality-control manager at a light bulb factory needs to determine whether the mean life of a large…

A: From the given information we conduct Z test for mean.

Q: Assuming that the distribution of the measurements made was normal, 13 measurements were made for…

A: Given, n = 13 x¯ = 169s = 81μ = 64α = 0.01     To find, Test whether the melting point variability…

Q: A random sample of 46 adult coyotes from Northern Minnesota showed the average age to be 1.13 years…

A: Given that:n=sample size=46σ=population standard deviation=1.13μ=population mean=1.75X=sample…

Q: A city planner wants to estimate the average monthly residential water usage in the city. He…

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Q: We intend to estimate the average driving time of a group of commuters. From a previous study, we…

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Q: A city planner wants to estimate the average monthly residential water usage in the city. He…

A:

Q: The level of nitrogen oxides (NOX) in the exhaust of a particular car model varies with mean 0.7…

A: The question is about sampling distribution.Given :Population standard deviation of NOX in the…

Q: A local grocery store manager was tracking the amount of water customers purchased during the…

A: Consider that μ defines the population mean amount of water purchased by Americans.

Q: In a study of an Oil field, 100 permeability measurements have been usedand resulted in a normal…

A: Level of significance: The level of significance or α is the probability of rejecting H0 when, in…

Q: According to a poll, 73% of California adults (371 out of 506 surveyed) feel that education is one…

A: Since you have posted multiple questions, we will provide the solution only to the first question as…

Q: Overproduction of uric acid in the body can be an indication of cell breakdown. Over a period of…

A: Obtain the 95% confidence interval for population mean concentration of uric acid. The 95%…

Q: As part of a study of the treatment of anemia in pre-menopause women, researchers measured the…

A: GivenMean(x)=6.35standard deviation(s)=1.95sample mean(n)=46

Q: The pH of rain, measured at a weather station in Michigan, was observed for 39 consecutive rain…

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Q: The lengths of adult males' hands are normally distributed with mean 192 mm and standard deviation…

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Q: A major car manufacturer wants to test a new engine to determine whether it meets air pollution…

A: Given that  Sample size n =10 Sample mean =61.1 Standard deviation =3.0

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.