The shape of the distribution of time required to get an oil change at a 10-minute oil change facility is unknown. However, records indicate that the mean time for an oil change is µ = 11.4 minutes and standard deviation σ = 3.2 minutes.   To compute probabilities regarding the sample mean using the normal model, what size sample would be required? What is the probability that a random sample of  oil changes results in a sample mean time less than 10 minutes?  Can we solve this ?

Q: A population has a standard deviation of 25 and a mean of 300. Given a random sample of size 100,…

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Q: A population has a standard deviation of 18 on average how much difference should exist for a random…

A: From the provided information, Population standard deviation (σ) = 18 Sample size (n) = 36

Q: A random sample of 10 subjects have weights with a standard deviation of 11.9848 kg . What is the…

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Q: A population is normally distributed with mean 158 and standard deviation 45. A random sample of 56…

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Q: A math teacher claims that the mean scores on a math assessment test for fourth grade boys and girls…

A: The provided information is  x¯2=151x¯2=149s1=36s2=34n1=13n2=15α=0.01 a.The null and alternative…

Q: Suppose we are about to sample 150 values from a normally distributed population that has a mean of…

A: Solution-:Given: We want to find  the 80th percentile of the sampling distribution of the sample…

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.