Hi I need help on what is the answer to this problems?
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1.
R Answer sheet in Probability and Statistics- week 1 Shot by Aikiey @ AI QUAD CAMERA Name: Score: Direction : Solve each problem by following the steps in hypothesis testing. Write your answer on the blanks/space provided. DO NOT USE EXTRA SHEETS OF PAPER 1. A manufacturer of cellphone batteries claims that the average population life span of his product is more than 40 hours. A company is willing to buy a large shipment of batteries if the claim is true.A random sample of 36 batteries is tested and it was found that the sample mean life is 45 hours. If the population mean life has a standard deviation of 5 hours, is it likely that the batteries will be bought? ( use 0.05 level of significance ) Step 1 :Ho Ha: Step 2: Step 3: Step 4: Step 5: Step 6 : Conclusion: Interpretation: 2. All freshmen in a particular school were found to have a variability in grades expressed as a standard deviation of 3. Two samples among these freshmen, made up of 20 and 50 students each, were found to have means of 88 and 85 respectively. Is the first group really 2021 06 15 13:05 brighter than the second group at 0.01 level of significance? Step 1: Ho2021/06/15 13:05 Ha: Step 2 : Step 3 : Step 4 : Step 5: Step 6 : Conclusion: Interpretation: AI QUAD CAMERA Shot by Aikiey @ RR Answer sheet in Probability and Statistics- week 2 Came: Score: Erection : Solve each problem by following the steps in hypothesis testing. Write your answer on the Shot by Aikiey Banks/space provided. DO NOT USE EXTRA SHEETS OF PAPER 1. Beta Company is manufacturing steel wire with an average tensil and strength of 50kilos. The AD CAMERA laboratory tested 16 pieces and found out that the mean is 47 kilos and the standard deviation is 15 kilos. Is the result in accordance with the population mean that the average tensil and strength of the steel wire is 50 kilos?( use 0.05 level of significance ) Step 1 :Ho Ha: Step 2: Step 3: Step 4: Step 5: Step 6 : Conclusion: Interpretation: 2. A company is trying to decide which of two types of tires to buy for their trucks. They would like to adopt brand C unless there is some evidence that brand D is better. An experiment was conducted where 16 tires from each brand were used. The tires were run under similar conditions until they wore out. The results are: 2021/06 15 13:05 Brand C: X1 = 40,000kms and $1 = 5400kms Brand D: X2 = 38,000kms and $2 = 3200kmsR Shot by Allday@ AI QUAD CAME Step !: Ho Ha: Step 2 : Step 3 : Step 4 : Step 5: Step 6 : Conclusion: Interpretation: 2021/06/15 13:05
