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Please I need help with this.. i need a) find the sample mean b) find the sample standard deviation c) a 90% confidence interval for

Please I need help with this..

i need

a) find the sample mean

b) find the sample standard deviation

c) a 90% confidence interval for the population mean is?

Please show work to understands better

image text in transcribed
The grade point averages (GPA) for 12 randomly selected college students are shown on the right. Complete parts (a) through (c) 2.4 below. 3.1 2.9 1.9 0.7 4.0 Assume the population is normally distributed. 2.2 1.1 3.8 0.1 2.1 3.2 (a) Find the sample mean. (Round to two decimal places as needed.)

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