Hello,using the standard normal distribution chart to find the z,my answer was .51595. I dont know how they came across z=-1.75 . pls explain which standard normal distribution was used

Suppose that we have a problem for which the null and alternative hypothesis are given by: Ho H 1020 HEUS 1020 Is this a right tailed test. left failed test, or two-tailed test. Find the z value based on a level of significance of .04. Your Answer: Ho: U: 1020 Hiu. 1020 a= 0.04 Standard Normal Distribution Chart: z- -1.75 This is a left-tailed test because due to the alternative hypothesis predicting It will be less than 1020