A sample mean, sample size, population standard deviation, and confidence level are provided. Use this information to complete parts (a) through (c) below. x = 20, n = 36, o = 3, confidence level = 95% Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table, ..... c. Obtain the margin of error by using the formula E = z. Identify the critical value. Za = 2 (Type an integer or decimal rounded to two decimal places as needed.) What is the margin of error obtained using the methods of parts (b) and (c)? (Type an integer or decimal rounded to one decimal place as needed.)

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