A firm specializing in the preparation of income tax returns, claims the mean refund for customers who received refundslast year was R150. For a random sample of 12 customers who received refunds last year, the mean amount was found tobe R125, with a standard deviation of R43. The test statistic (rounded off to two decimals) is:O A. Z=-2.01O B. T=2.20O C. T=-2.01O D. T<-2.20

Answered: A firm specializing in the preparation…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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