How large of a sample size in needed for the sample mean to be within 0.1 hours of the population mean with 90% confidence

Q: n this scenario, what is the test statistic? A linguist believes the average age children learn a…

A: Given: n= 21.0 ,x̄= 9.2 ,s= 2.5 µ= 10.0 ,degree of freedom= 20.0

Q: The means of two single large samples of 1200 and 2300 members are 76.5 inches and 86 inches…

A:

Q: For each data example, identify whether it is qualitative, quantitative discrete, or quantitative…

A: Quantitative data is information about quantities, and therefore numbers whereas Qualitative data is…

Q: A teacher says that the top 9​% of the class received an A on the last test. The scores were…

A: Given that the mean is 67 and the standard deviation is 18. That is, μ=67, σ=18 A teacher says that…

Q: a 95% confidence interval for the mean of diastolic BP in women is 62 to 110mmHg.  What is the…

A: We have given that 95% confidence interval CI = ( 62, 110) Confidence level (c) = 95% = 0.95…

Q: According to National Health Survey heights of men are normally distributed with mean of μ=69.0…

A: The standard deviation is obtained below Critical value: From the standard normal distribution…

Q: The lengths of pregnancies are normally distributed with a mean of 280 days and a standard deviation…

A:

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: Vhich distribution is used to construct an interval estimate of a population standard deviation?

A: Which distribution is used to construct an interval estimate of a population standard deviation?

Q: An IQ test has a mean of 97 and standard deviation of 10. Which is more unusual, an IQ of 87 or an…

A: Given data  μ = 97σ = 10which score is more unusual? 87 or 110?

Q: The scores of students on an exam are normally distributed with a mean of 496 and a standard…

A: The mean is 496 and the standard deviation is 67.

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: The height of men is a normally distributed variable with a mean of 68 inches and a standard…

A: Mean(μ)=68Standard deviation(σ)=3

Q: Assume that the heights of women are normally distributed with a mean of 65.4 inches and a standard…

A: We have given that  Mean=μ=65.4 Standard deviation=σ=2.7 X~Normal(μ=65.4,σ=2.7)

Q: Find a 90% interval estimate of the mean daily time spent on rigorous exercise by all employees.

A: From a random sample of 25 employees, the mean time spent on vigorous daily exercise was 28.5…

Q: According to the Empirical rule, 99.74% of the data would fall between what two values for a…

A: Given : Population mean : μ=438 Population standard deviation : σ=135

Q: Today, the waves are crashing onto the beach every 5.6 seconds. The times from the shoreline until a…

A: Multiple Sub-parts: Solve first three sub-parts in a multiple sub-part question, unless the student…

Q: The length of pregnancies are normally distributed with mean of 268 days and a standard deviation of…

A: Given : Length of pregnancies = X  X is normally distributed  Mean of X = 268 days  Standard…

Q: The length of time to complete a standard achievement test possesses a mean of 58 minutes, with a…

A: Consider that the mean and standard deviation of a random variable X are µ and σ, respectively.…

Q: are normally distributed with a mean of 100 and a standard deviation of 15. What IQ is in the 90th…

A: Kwe have to find out given probabiity..

Q: If research samples 28 college students and wants to compare the sample mean of 8 to the population…

A: From the provided information, Sample size (n) = 28 Sample mean (x̄) = 8 Population mean (µ) = 12…

Q: when designing aircraft cabins, what ceiling height will alow 98% of men to stand without bumping…

A:

Q: A student will spend 15 hours average each week in class. If the standard deviation is 2 hours, what…

A: Given that mean=15 and standard deviation = 2 Let, X= number of hours spent by a student in the…

Q: The MF exam has a population mean of 500 and a standard deviation of 200. What are the scores for…

A: Let X=MF exam scores We have given information, The population mean μ=500 And population standard…

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

A:

Q: An economist would like to estimate the mean amount of money that a family spends to within $36. If…

A: Given that  Population standard deviation =200 Margin of error =E =36 91% confidence.

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

A:

Q: A survey found that women's heights are normally distributed with mean 62.3 inches and standard…

A: Mean(μ)=62.3Standard deviation(σ)=2.2

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: 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: Steel rods are manufactured with a mean length of 28 centimeters. because because of variability in…

A: Answer:- Given, Mean, µ = 28  Standard deviation, σ = 0.06  Let, X = Length of the steel rods.  So,…

Q: A survey found that women's heights are normally distributed with mean 62.3 inches and standard…

A: Mean(μ)=62.3standard deviation(σ)=2.2Live characters employes at an amusement park have height…

Q: A researcher would like to estimate the mean amount of money that a family spends to within $75. If…

A: Determine the sample size.   The sample size is obtained below as follows:

Q: A researcher wants to estimate the mean sleeping time of patients with sleep apnea. In a similar…

A: We have to find how many patients should be sampled to be 95% confident with the result accurate…

Q: An IQ test has a mean of 96 and a standard deviation of 15. Which is more​ unusual, an IQ of 81 or…

A: The Higher z score value will be more unusual The formula of z score is give by…

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.