A random sample of  n1 = 49  measurements from a population with population standard deviation  σ1 = 3  had a sample mean of  x1 = 10.  An independent random sample of  n2 = 64  measurements from a second population with population standard deviation  σ2 = 4  had a sample mean of  x2 = 12.  Test the claim that the population means are different. Use level of significance 0.01.  (c) Compute  x1 − x2.   x1 − x2 =  Compute the corresponding sample distribution value. (Test the difference μ1 − μ2. Round your answer to two decimal places.)

Q: 6. Ackerman and Goldsmith (2011) report that students who study from a screen (phone, tablet, or…

A: Given :  μ = 77 σ = 8  n = 16

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A: H0: σ12 =σ22 HA:σ12 > σ22 ============= DF = n-1

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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.