The test statistic of zequalsnegative 2.40 is obtained when testing the claim that less than 0.32. a. using a significance level of alphaequals0.10, find the critical value(s). b. should we reject upper h 0 or should we fail to reject upper h 0

a) Critical value = -1.285

b) We should reject null hypothesis that the mean equals 0.32

Step-by-step explanation:

Given that the  statistic of z equals negative 2.40 is obtained when testing the claim that less than 0.32

i.e. for hypotheses

(one tailed test at 10% significance level)

Z critical value for 90% one tailed = -1.285

Since our test statistic is less than -1.285 we reject null hypothesis

a) Critical value = -1.285

b) We should reject null hypothesis that the mean equals 0.32

c

c

c

c

c

c

c

cc

c

step-by-step explanation: