The population standard deviation for the age of GPTC students is15 years. If we want to be 95% confident that the sample mean age is within two years of the true population mean age of GPTC students, how many randomly selected GPTC students must be surveyed? Round your answer UP to the next higher interger to ensure that the sample sizi large enough.

Q: Humerus bones from the same species of animal have approximately the same length-to-width ratios. It…

A: Solution: Given information: n= 100 Sample size  x= 5.6 Sample mean s= 0.25 Sample standard…

Q: In estimating the population mean with the population standard deviation unknown, if the sample size…

A: Given that, Population standard deviation is unknown and sample size (n) = 27

Q: When the mean of the sample 15 countries' fiscal-balance-to-GDP ratio (expressed as %)  is -5.74 and…

A: Sample mean, x = -5.74  sample standard deviation , s = 5.97 sample size, n = 15   Claim to be…

Q: A Seattle consumer agency believes that plumbers’ rates are too high and wants to estimate the mean…

A: GivenConfidence Interval(c)=95%Margin of Error(E)=3%=0.03Let…

Q: Women's heart beats per minute  are normally distributed with a mean of 72bpm and a std. dev. of…

A: We have to find the percent of women who would have heartbeats between 48bpm and 96bpm.

Q: Suppose that striped dolphin lengths are normally distributed with a population standard deviation…

A: The formula for the minimum sample size is as follows: Here, zα/2 is the critical value at 95%…

Q: umerus bones from the same species of animal have approximately the same length-to-width ratios. It…

A:

Q: oby's Trucking Company determined that on an annual basis, the distance traveled per truck is…

A:

Q: If you want to be99​% confident of estimating the population proportion to within a sampling error…

A: Proportion is almost similar to the concept of probability. Proportion is a fraction of the…

Q: What sample size is needed to give a margin of error within +3 in estimating a population mean with…

A:

Q: Determine the minimum sample size needed if we want to estimate the mean age of Camden County…

A: Obtain the required sample size: The given confidence level 100*(1–α)% = 95%. The critical value is…

Q: The average and standard deviation for the number of stamps owned by stamp collectors around…

A: Given : mean = 961 S.D = 284 Sample size = 134

Q: A process window is set so that 95.44% of product passes the process spec. In order to pass, the…

A: question: A process window is set so that 95.44% of product passes the process spec. In order to…

Q: How many adults must be randomly selected to estimate the mean FICO (credit rating) score of working…

A: By using the provided information, We have 95% confidence level Margin of error = 4 Population…

Q: How does the sample size affect the value of the mean and the standard deviation? Please elaborate.

A: Mean : The mean is the data's Centre point or typical value and summarizes a complete dataset with a…

Q: accounting examination is 26, how large a sample is needed to estimate the true mean score within 6…

A: HERE GIVEN , n = ??? population standard deviation  =  26  confidence level  = 99%

Q: If you want to be 95​% confident of estimating the population proportion to within a sampling error…

A: z-critical value at alpha(0.95) = 1.96 margin of error =0.08   p = 0.5

Q: If you have a population standard deviation of 10 and a sample size of 4, what is your standard…

A: Given,population standard deviation(σ)=10sample size(n)=4

Q: The University of Sydney conducted a survey to find out the average number of hours an academic…

A:

Q: If the number of degrees of freedom for a chi-square distribution is 28, what is the population mean…

A: It is known that for chi-square distribution: μχ2=degree of freedom   So,μχ2=28

Q: Suppose that another sample of resting heart rates for five Math students was obtained: 72, 68, 66,…

A: From the given data we want to know the data value .

Q: i want to estimate the mean number of minutes that a 7 year old watches TV daily. How many kids…

A: Given data,σ=45E=15z-value at 99% confidence is Zc=2.576n=?

Q: What is the relationship between the standard error of the mean and the sample size "n"?

A: The relationship between the standard error of the mean (SEM) and the sample size "n" is inverse.…

Q: Suppose a claim is made that the mean age of members of a golf club is 52 years. The population…

A: Given: μ = 52 σ = 6 n = 50 X = 56 Formula Used: Test-statistic Z = X-μσn

Q: The dispersion of the copper determination in the seawater sample is 2.24%. How many parallel…

A:

Q: The standard deviation on a final examination was 9, while the mean grade was 72. The best 14% of…

A: GivenMean(μ)=72standard deviation(σ)=9

Q: 99% confidence interval for the mean of entire student.

A:

Q: A university dean wishes to estimate the average number of hours that freshmen study each week. The…

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Q: You are conducting a study to estimate the mean height of students in a university. The university…

A: To calculate the sample size required to estimate the mean height of students in the university with…

Q: The standard IQ test has a mean of 99, and a standard deviation of 16. We want to be 90% certain…

A: Given data,μ=99σ=16E=5Z-value at 90% Confidence is Zc=1.645n=?

Q: The latest available data showed health care spending were $8086 per person in the United States…

A: Givenpopulation mean = $8086population standard deviation = $2500sample size = 100Health care…

Q: A grocer finds that the cantaloupes in his store have weights with mean 0.7 kg and standard…

A: Given, Mean weight of cantaloupes is 700 gm. Standard deviation is 53 gm

Q: If this​ 3-year-old boy grows up to be a man with a height at the same​ percentile, what will his…

A: The population mean is 70 and population standard deviation is 3.

Q: ppose that at Yellowstone National Park, they want to estimate the population mean weight of the…

A:

Q: In a standardized exam the mean score is 400 with a standard deviation of 50. If a random sample of…

A: Given that  μ= 400 , σ= 50 , n = 25

Q: The height of seaweed of all plants in a body of water are normally distributed with a mean of 10 cm…

A: It is given that the mean is 10 and standard deviation is 2.

Q: According to the U.S. Census, the average adult woman is the United States is 65 inches tall and the…

A: Given X is normal Distributed with mean µ = 65.0 and standard deviation σ = 3.0 Need to find Z score…

Q: What is the SD of a distribution if the mean is 4.5 and a z score of 3.5 corresponds to a raw score…

A: GIVEN DATA, μ=4.5z score =3.5raw score =x=15standard deviation =σ=?

Q: An economist would like to estimate the mean amount of money that a family spends to within $30. If…

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.