In a lower tail test about the population mean, where the population standard deviation is known, a sample of size 40 was taken. Use 5% significance. Find the critical value(s). Select one: O a. Only 1.645 O b. Both -2.023 and 2.023 O c. Both -1.96 and 1.96 O d. Only 1.685 O e. Only -1.685 O f. Only -1.645

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In a lower tail test about the population mean, where the population standard deviation is known, a sample of size 40 was
taken. Use 5% significance. Find the critical value(s).
Select one:
O a. Only 1.645
O b. Both -2.023 and 2.023
O c. Both -1.96 and 1.96
O d. Only 1.685
O e. Only -1.685
O f. Only -1.645
Transcribed Image Text:In a lower tail test about the population mean, where the population standard deviation is known, a sample of size 40 was taken. Use 5% significance. Find the critical value(s). Select one: O a. Only 1.645 O b. Both -2.023 and 2.023 O c. Both -1.96 and 1.96 O d. Only 1.685 O e. Only -1.685 O f. Only -1.645
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