The weight of a certain machined part has a standard deviation of 4 grams. How many parts from the assembly line would you need to sample to calculate a 95% confidence interval estimate of the average weight of the parts being manufactured with a margin of error of 2.27 grams?

Q: How large a sample should be selected to provide a 90% confidence interval with a margin of error of…

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Q: From a population of 540, a sample of 60 individuals is taken. From this sample, the mean is found…

A: Given that, From a population of 540, a sample of 60 individuals is taken. From this sample, the…

Q: you wish to estimate the mean weight of a machine components of a certain type and you require a 99%…

A: It is given that the confidence level is 0.99, the standard deviation is 0.06, and the margin of…

Q: An Army official wants to estimate the mean weight of a particular type of weapon.  He takes a…

A: Given that, Mean = 48.1 Standard deviation = 0.12 Sample size = 100 98% confidence level

Q: A 95% confidence interval for a population mean was reported to be 134 to 142.  If the population…

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Q: if E=0.07 and population standard deviation=0.8 then find the sample size for 99% confidence…

A: Margin of error(E)=0.07 population standard deviation(σ)=0.8 confidence level=99%

Q: You collect a sample of 61 observations of animal heights, in mm. The sample mean is 65.19 and the…

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Q: How large a sample should be selected to provide a 95% confidence interval with a margin of error of…

A: Given : Margin of error = 5 α = 0.05 Population standard deviation = σ = 30 zα2 = z0.052 = 1.96

Q: Pete kept records of the fuel efficiency of his car. After the first 100 times he filled up the…

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Q: You measure 32 textbooks weight and find they have a mean weight of 67 ounces. Assume the standard…

A: Given: Sample size (n) = 32 Mean (x̄) = 67 ounces Population standard deviation (σ) = 8.302…

Q: Noise levels at various area urban hospitals were measured in decibels. The mean of the noise levels…

A: The formula of the margin of error is,

Q: How large a sample should be selected to provide a 95% confidence interval with a margin of error of…

A:

Q: Find the margin of error for a​ 95% confidence interval for estimating the population mean when the…

A: Sample S.D = s = 110

Q: A sample of 8 adult elephants had an average weight of x = 12300 pounds. The sample standard…

A: Given that, Mean = 12300 Standard deviation = 22 Sample size = 8

Q: A survey of 30 adults found that the mean age of a person’s primary vehicle is 5.6 years. Assuming…

A: A confidence interval is a type of estimate computed from the statistics of the observed data. This…

Q: 3. A sample of 8 adult elephants had an average weight of 12,300 pounds. The standard deviation for…

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Q: random sample of 36 people in Edirne city was asked how much their monthly income was. The sample…

A: Given: Sample size (n) = 36 Sample standard deviation (s) = 1200 Sample mean x¯=16000 Confidence…

Q: Find the 90% confidence interval for the standard deviation of the lengths of pipes if a sample of…

A: given data s = 10.2 n = 22 90% CI for σ = ? α = 1 - 0.90 = 0.10df = n - 1 = 21χ2L = χ21-α2,n-1…

Q: A medical doctor who wanted to study the heights of adult men and women took a random sample of 150…

A: Given n1=150 n2=120

Q: A large number of bags of cement have been manufactured. You sample 10 of the bags and find that…

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Q: You measure 27dogs' weights, and find they have a mean weight of 63 ounces. Assume the population…

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Q: Find the Margin of Error, if we are asked for 90% confidence interval where the mean is 52.3, the…

A: The provided information are: Confidence level = 90% Population standard deviation (σ)=2.15 Sample…

Q: Mrs. Gallas wanted to estimate the average weight of an Oreo cookie to determine if the average…

A: In statistical inference, there are two types of estimation,  Point estimation and Interval…

Q: The average hemoglobin reading for a sample of 20 LHS teachers was 16 g/100 ml, with a sample…

A: We need to find the 95% confidence interval for the given sample data.

Q: A random sample of 500 observations yields x̅ =400 and s=50. What is the  95% confidence interval…

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Q: Find a 95% confidence interval that contains the population variance if a sample of 41 generates a…

A: Given : sample varience s^2=25 and sample size n=41  then to find 95% confidence interval of…

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.