The following sample data has been drawn from a population w

The following sample data has been drawn from a population with unknown variance.

Download the data

a)It would be appropriate to use the t procedure for this data when the histogram for the data most closely resembles graph ABC.

b)Calculate the 95% confidence interval for the population mean. Give your answers to 1 decimal place.

? ? ?

Sample data
177	183	182.5	186.2	175.6	170.2	155.9	180.5	155.9	164.2	171.4	197.6
175.2	174.5	191.9	178.1	184.8	166.2	172.1	173.9	165.2	155.7	175.5	164.3
172.2	160.8	163.7	166.8	179.2	168.6	168.9	174.8	172.9	153.9	167.1	178.8
178.7	163.3	180.1	165.6	154.3	166.7	188.1	175.7	171.1	179.7	176.6	163.5
176.5	168.3	166.8	159.8	189.8	172.9	172.9	163.2	157.4	173.9	162.4	169.2

The following sample data has been drawn from a population with unknown variance. Download the data a)It would be appropriate to use the t procedure for this data when the histogram for the data most closely resembles graph ABC. b)Calculate the 95% confidence interval for the population mean. Give your answers to 1 decimal place. ? ? ?

Solution

(a) C

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(b)

169.2

169.2	confidence interval 95.% lower
174.2	confidence interval 95.% upper
2.4779	margin of error