A researcher is testing a null hypothesis that states, H0: μ= 50. A sample of 25 scores is selected and M= 55.   Assuming the sample variance is s2 = 100, compute the estimated standard error and the t-statistic. Is this sample sufficient to reject the null hypothesis using a two-tailed test with a= .05? Note: This is a two-tailed test HA:   df=  tα or t value for the critical region =  sM =  t = Decision

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