Question

Listed below are foot lengths in inches for 11 randomly selected people taken in 1988. Find the​ range, variance, and standard deviation for the given sample data. Include appropriate units in the results. Are the statistics representative of the current population of all​ people?

8.58.5     

10.210.2     

9.49.4     

10.110.1     

10.210.2     

8.68.6     

10.210.2     

8.68.6     

9.39.3     

8.58.5     

9.49.4

  

The range of the sample data is

1.71.7

people.people.

​(Type an integer or a decimal. Do not​ round.)

The standard deviation of the sample data is

nothing

▼

people.people.

inches squared .inches2.

inches.inches.

people squared .people2.

​(Round to two decimal places as​ needed.)

The variance of the sample data is

nothing

▼

people.people.

inches squared .inches2.

inches.inches.

people squared .people2.

​(Round to two decimal places as​ needed.)

Are the statistics representative of the current population of all​ people?

A.

Since the measurements were made in​ 1988, it is not necessarily representative of the population today.

B.

The statistics are not representative because a smaller sample is needed to represent the population.

C.

The statistics are representative because they are taken from a random sample.

D.

The statistics are representative because the standard deviation of the sample data is less than 1.

Answer 1

PINOO Answer:- uw Given that, data the in ascending order Arranging 8.5, 815, 816, 8.6, 9.3, 9.4.914, 10.1, 102, 1012, 10.2 » Range maximum value minimum value S - 1012-815 117 Range =117 inches Mean ()- Eq -> n x=815+855 +816 +816+913+914 +9.4 +0.1+10.2+10.2tloid 103 11 X = 9.36 inches Standard deviation (3) > 461-3j2 n-1 5.30545 10 0.72 inches - variance C ཐུན) 015305 52 0153 inches since the measurements made in 1998, db is not necessary representative of population today. is correct Hence, option