Compute the sample standard deviation of the sample obtained in Example 1 (b) from Section 3.1.

Approach We follow the same approach that we used to compute the population standard deviation, but this time using the sample data. In looking back at Example 1(b) from Section 3.1, we see that Jennifer (62), Juan (88), Ryanne (77), and Dave (68) are in the sample.

Data from Example 1 Section 3.1.

The data in Table 1 represent the first exam score of 10 students enrolled in Introductory Statistics. Treat the 10 students as a population.

(a) Compute the population mean.

(b) Find a simple random sample of size n = 4 students.

(c) Compute the sample mean of the sample found in part (b).

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Table 1 Student Score 1. Michelle 82 2. Ryanne 77 3. Bilal 90 4. Pam 71 5. Jennifer 62 6. Dave 68 7. Joel 74 8. Sam 84 9. Justine 94 10. Juan 88