Construct a 90% confidence interval for u -42 with the sample statistics for mean cholesterol content of a hamburger from two fast food chains and confidence interval construction formula below. Assume the populations are approximately normal with unequal variances. Stats X1 = 121 mg, s, = 3.85 mg, ng = 20 X2 = 115 mg, s2 = 2.13 mg, n2 = 15 Confidence interval when variances are (x1 -x2) -te-+ not equal g• (2x - bx) > Zt - +> d.f. is the smaller of n -1 or n2-1 Enter the endpoints of the interval.

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Types of Bias

Statistics is the study of data collection, organization, analysis, interpretation, and presentation. Statistical bias is a characteristic of a statistical technique or its findings in which the expected value deviates from the actual root quantitative parameter being estimated. According to the actual definition of bias, it refers to the tendency of a statistic to overestimate or underestimate a parameter.