If you flip over the x-axis A' would be (1, -1) (just change the sign on the x)
Then rotate 180 reverse the points to get A'' at (-1, 1)
Answer: z=-1.00
Step-by-step explanation:
Given : Population mean :
Sample size : n=120 ;
Sample mean: ;
Standard deviation:
Test statistic for population mean:
Hence, the value of the test statistic : z=-1.00
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