Test-Statistic Value

Sir/Ma'am, can you answer the act below. I will provide the key answer, however, it might be wrong.

Activity 4. 1. a.step 1. There is no significant diff. bet. The hypothesized mean and the sample mean Step3. 1.96 step 4. Reject Ho Zc >Zt step 5 Zc = 2.53 step 6. There is significant diff. between the hypothesized mean and the sample mean b. step1. 0.05 2. 1.65 3. Ze>Zt 4. Accept the Null hypo. 2. Step 1. U=24 U >24 step 2. 0.05 step 3. Zt = 1.64 step 4. Zc= 9.74 step 5. Reject Ho Step 6. There is no enough evidence to loss 24 pounds 3. Step 1. Ho= 45 Ha#45 step 2.0.025 step 3. -2.24 step 4. reject Ho if Ze