An industrial psychologist is concerned that a recent round of layoffs at a plant may have increased the stress felt by employees who retained their positions. To measure whether this survivor stress actually exist the psychologist administered a stress measurement to a sample of employees before and after the layoffs occurred. Use α = .01. (4)   Employee Stress Score (X₁) Stress Score (X₂) A 21 23 B 24 26 C 15 15 D 18 22 E 19 20 F 20 19 G 18 21 a. Does a recent round of layoffs at a plant significantly increase the stress level? b. Compute the 90% confidence interval

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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.