Question: Consider two dependent samples with sample sizes of n1=40 and n2=50. The mean difference between the two samples is 0.75 with a standard deviation of 0.6. Calculate the 95% Confidence Interval for the mean difference using a dependent samples t-Test.

Q: A sample of 26 observations is taken from a normal Histribution with unknown mean. The sample mean…

A: The 95% confidence interval for the true population mean is obtained below as follows: The formula…

Q: The average income among a sample of 75 students studying at University of Chichester is found to be…

A: sample size(n)=75Mean()=50standard deviation(s)=13confidence interval=95%

Q: What is the smallest sample size required to provide a 95% confidence interval for a mean, if the…

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Q: if a sample n = 16, mean = 10.3,standard deviation is 2.6. calculate a 95% confidence interval.

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Q: A study was made of a sample of 25 records of patients seen at a chronic disease hospital on an…

A: Given data : Sample size = 25 Sample mean = 4.8 Sample standard deviation = 2 Population mean = 4…

Q: Presented are the ozone concentrations in areas of Philippines, Japan, Taiwan, and Singapore. Obtain…

A: Given  the ozone concentrations in areas of Philippines, Japan, Taiwan, and Singapore.

Q: Independent students show that the average length of education of 70 r/s California adults is 12.7…

A: Confidence interval is an interval such that the probability of the unknown parameter to be included…

Q: The time needed for college students to complete a certain test follows a normal distribution. A…

A: We have given that,  Sample size (n) = 9 and sample standard deviation (s) = 3.5 and and sample mean…

Q: mean = 9.4285 Standard deviation= 2.0188 count= 35 students 1. Give and interpret the 95% confidence…

A: From the given information,Mean (x-bar) = 9.4285Standard deviation (σFrom the given information,Mean…

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: From the scores in subject statistics for 8 students, it was found that the mean score is 73 and the…

A: We have given that,  Sample mean (x̄) = 73,  standard deviation (s) = 5.15 and sample size (n) = 8…

Q: Let us suppose we have data on the absorbency of paper towels that were produced by two different…

A: For process 1  Sample size n1=10 meanx1=180 Standard deviations1=15 For process 2  Sample size n2=4…

Q: A sample of 48 observations is taken from a normal population with a standard deviation of 17. The…

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Q: Gary observed the fuel efficiency of his SUV. After the first 100 times he filled up the tank, he…

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Q: The age of managers in particular industry is normally distributed with mean μ=35. A group of 30…

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Q: A Industrial Psychology test was written. From a sample of 50 students and it was found that the…

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Q: A sample of 82 Oscar-winning actresses had a mean age of 35.9 years when they won the award. s =…

A: Given information- Population mean, μ = 33 years Sample size, n = 82 Sample mean, x-bar = 35.9 years…

Q: The average American consumes 82 liters of alcohol per year. Does the average college student…

A: Given,sample size(n)=15sample mean(x¯)=73.1standard deviation(s)=15degrees of…

Q: The time needed for college students to complete a certain maze follows a normal distribution with a…

A: t-test: If the given sample size is less than or equal to 30 and sample standard deviation is given.…

Q: A cellular phone company is interested in estimating the difference between the mean ages of females…

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Q: We are interested in estimating the average amount spent per customer for lunch in a restaurant at…

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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: 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: You would like to estimate the variance of GPA’s at SDSU.  You randomly select 14 students and get a…

A: From the provided information, Sample size (n) = 14 Sample standard deviation (s) = 0.981 Confidence…

Q: 20 TV remote controls were followed over the years to find the mean lifespan of this model. The…

A: Answer - Here  n = 20 TV remote controls were followed  over the years to find the mean…

Q: The operations manager at a light emitting diode (LED) light bulb factory needs to estimate the mean…

A: From the provided information, Sample size (n) = 64 Sample mean (x̅) = 49875 hours Population…

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

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Q: A sample of 106 body temperatures was taken and the mean was 98.2 degrees F. The population standard…

A: Given: n=106, X=98.2, σ=0.62, μ=98.6The null and alternative hypothesis is,H0:μ=98.6Ha:μ≠98.6 The…

Q: If the sample mean is 8, the hypothesized population mean is 4, and the population standard…

A: The hypothesized population mean is 4, the sample mean is 8 and the population standard deviation is…