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 the sample standard deviation, and (c) construct a 98% confidence interval for the population mean.

100,146	81,264	78,431	67,820	51,386	67,942	93,400	66,220
78,910	73,490	44,382	87,365	60,445	57,551	54,642	78,153
47,297	99,026	81,255	92,865	63,533	74,617	50,870	60,769
92,481	84,357	79,285	64,334	74,488	56,585	46,716	89,531
75,074	61,796	81,987

Question content area bottom

Part 1

(a) Find the sample mean.

Part 2

(b) Find the sample standard deviation.

Part 3

(c) Construct a 98% confidence interval for the population mean.