4. On average it has been found in grocery stores that 1% of scanned items are priced incorrectly. Recently, a sample of 1,034 randomly selected items were scanned and 20 were found to be priced incorrectly. Has the rate of incorrectly priced items changed? 4A. What is the appropriate test procedure? z-Test of the mean. t-Test of the mean. z-Test of the proportion. None of these. 4B. What is the appropriate null hypothesis? = 0.01 s 0.01 0.01 2 0.01 4C. What is the appropriate alternative hypothesis? . = 0.01 0.01 4D. Assume it should be a t-test and the sample size is 105. What decision would be made for a hypothesis test at significance 0.05 if you calculated a test statistic of 0.94? Do not reject the null. Reject the null. Sometimes reject the null. Do not reject the alternative.