from scipy.stats import norm # Calculate the critical value for left-tailed Z-test with alpha = 0.05 critical_value_left = 0 - norm.ppf(0.95) print("Critical-value for left-tailed test: ", critical_value_left) # Calculate the critical value for right-tailed Z-test with alpha = 0.05 critical_value_right = norm.ppf(0.95) print("Critical-value for right-tailed test: ", critical_value_right) # Calculate the critical value for two-tailed Z-test with alpha = 0.05 critical_value_right = norm.ppf(0.975) critical_value_left = 0 - critical_value_right print("Critical-value left for two-tailed test: ", critical_value_left) print("Critical-value right for two-tailed test: ", critical_value_right)
The output of the above program will be:
Critical-value for left-tailed test: -1.6448536269514722 Critical-value for right-tailed test: 1.6448536269514722 Critical-value left for two-tailed test: -1.959963984540054 Critical-value right for two-tailed test: 1.959963984540054






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