A poll of 1350 adults in the United States asked how much confidence they had in banks. A total of 203 adults said they had a great deal of confidence. An economist claims that less than 15% of U.S. adults have a great deal of confidence in banks. Can you conclude that the economist's claim is true? Use the a = 0.01 level of significance. %3D Fill in the blanks 1) State the null and alternative hypothesis A. 3D0.15 B. p > 0.15 C.p< 0.15 D. p#0.15 H1: 2) Compute Test Statistics. Round your answer in 4 decimal places The test statistics is 3) Find Critical Value. Round your answer in 2 decimal places

NOTE: As per the guidelines, only first three subparts have been solved here Given information: A poll of 1350 adults were asked in a poll that how much confidence they had in banks. A total of 203 adults said that they had a great deal of confidence in banks. Therefore, the sample parameters are: n=1350X=203 where, n is the sample size and X is the number of people who said that they have a great deal of confidence in the banks. The economists claims that the population proportion p of adults that said they have great deal of confidence in the banks is less than 15%. The test if performed at 0.01 level of significance.1) Since it is claimed that less than 15% of US adults have a great deal of confidence in the banks, therefore, the alternative hypothesis is framed accordingly. In contrast, the null hypothesis is stated. The null and the alternate hypothesis for testing the claim is: Ho: p=0.15Ha: p<0.15 2) The sample proportion is computed as, p^=Xn=2031350=0.1504 The test statistic for testing is computed as: Z=p^-pp×1-pn=0.1504-0.150.15×1-0.151350=0.0412 Thus, the calculated z-test statistic is 0.0412.3) The critical value for left-tailed tabulated value z at 0.01 level of significance is -2.33.Since the calculated value of the z test statistic is not less than the tabulated value of z at 0.01 level of significance, therefore, Ho could not be rejected and thus, accepted. Hence, there is enough evidence to conclude that the population proportion p of adults that said they have a great deal of confidence in the banks is not less than 15%.