Question

(a)-1,305 b)-0.872 #) Find the standardized test statistic + for a sample with M= 20, x= 10.9, 5= 2.0, and d.o.on if H, pl. 11.3. round answer 3 decimal places. C)-0.894 d)-1.233 #2) if a sample of 12 is drawn from a Normal population, what should be used as the test statistic? a) to with 13 degrees of freedom b) Zo with Il degrees of freedom C) to witn il degrees of freedom d) zo with lg digues of freedom #3) Determine the critical value, 20, to test the claim about the population proportion p>0.015 given N=150 and p=0.077 Use a =0.01 a) 2.33 C) 2.575 b) 1.94 d) 1.145 #u) using the standard Normal distribution, find the critical value for a two-tailed test with a = 0.08. a) ±1.96 C) ± 1.405 b) ± 1.75 d) = 2.65

Answer 1

S 20 a=0.05 o + n = 20 X = 10.9 H, l < 11.3 test statistic t =x-l = 10.9-11-3 slun 2.0/850 t -0.894 -0.4 = -0,4 2.0/4.472136 0.447214 Answer © -0.8947 2 n = 12 L 30 we use rest t test have n-1 degrees of Freedom degrees of freedom - n - 1 = 12-15 Answer to with 11 degrees of freedom 3 N = 150 1 P> 0.015 critical value ²20.027 2=0,0) = Zocos - 2575 = Za = Zaos 그 Answer ③ [2.575 test N 1 two tailed :. critical value I 20.08 = I Z I 20.04=11.45 U 2. 2 on tical value t 1.75 Answer I 1.75