Question

The test statistic of z = -1.98 is obtained when testing the claim that p < 0.64. A) Using a significance level of alpha = 0.05​, find the critical​ value(s). b. Should we reject Upper H 0 or should we fail to reject Upper H 0​?

Please answer A and B note For part A

*​(Round to two decimal places as needed. Use a comma to separate answers as​ needed*

Answer 1

Solution :

The null and alternative hypothesis is ,

H0 : p = 0.64

Ha : p < 0.64

Test statistic = z = -1.98

This is the left tailed test,

a) P(z < z ) = 0.05

= P(z < -1.65) = 0.05

z * critical value = -1.65

b) Fail to reject Ho because test statistic less than critical value.