The annual earnings (in dollars) of 35 randomly selected microbiologists are shown in the data table. Use the data to (a) find the sample mean, (b) find thể sample confidence interval for the population mean. 99,129 81,179 78,032 68,121 51,544 67,846 93,641 66,471 O 79,117 73,389 44.332 86,752 60,865 58,193 54,934 78,246 63,189 74,491 47,446 98,288 80,897 93,468 74,708 50,453 61,060 91,986 84,590 79,727 63,986 56,734 47,272 89,371 75,412 61,474 81.960 (a) Find the sample mean. X= (Type an integer or decimal rounded to two decimal places as needed.)

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