New procedures are put in place to impact the time it takes to hire an employee in days.

Following is the data, before and after implementation, for two independent samples of 10 employees. Do the procedures have an impact?

Hypothesis: the new procedure impacts the amount of time to hire employees.

a) State the null and alternative hypothesis

b) You are given the mean and standard deviation for before and after. Calculate the overall standard error.

c) Calculate the t-score for the difference of means

d) Interpret your results

Transcribed Image Text:

average St.dev Before 36.4 49.2 26.8 32.2 41.9 29.8 36.7 39.2 42.3 41.9 37.64 6.708733942 After 32.2 45.2 31.3 27.1 33.4 29 24.1 38.2 38 37.2 33.57 6.22701 average St.dev Before 36.4 49.2 26.8 32.2 41.9 29.8 36.7 39.2 42.3 41.9 37.64 6.708733942 After 32.2 45.2 31.3 27.1 33.4 29 24.1 38.2 38 37.2 33.57 6.22701

Answer rating: 100% (QA)

a Null hypothesis H0 1 2 Alternate hypothesis H1 1 2 b Overall s... View the full answer