Casio ALGEBRA FX2.0 Advanced Statistics Examples 2 Instrukcja Użytkownika Pobierz pdf (Strona 6)

examples

Example Suppose 800 students were selected at random from a student body

of 20,000 and given shots to prevent a certain type of flu. All 800

students were exposed to the flu and 600 of them did not get the flu.

Let p present the probability that the shot will be successful for any

single student selected at random from the entire population of

20,000. Let q be the probability that the shot is not successful.

a) What are the point estimates for p and q?

b) Find a 99% confidence interval for p.

Procedure

1 m STAT2

2 4(INTR) b(Z)d(1-Prop)

3 .jjw

gaaw

iaaw

1(None)c

4 1(CALC)

Result Screen

a) The point of estimates for p = 0.75, and the point of

estimates for q = 1-p = 0.25.

b) Thus, the 99% confidence interval for p

becomes 0.71<p<0.79 .

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Casio ALGEBRA FX2.0 Advanced Statistics Examples 2 Instrukcja Użytkownika Strona 6