RC-Cars purchases batteries which they include with their remote control cars for sale to the consumer. Bill the owner received a large shipment this month. To guarantee the quality of the shipment he...

RC-Cars purchases batteries which they include with their remote control cars for sale to the consumer. Bill the owner received a large shipment this month. To guarantee the quality of the shipment he selected a random sample of 307 . He found that 26 were defective. Use this information to answer the following questions.
a) Obtain a point estimate of the proportion of defectives in population. For full marks your answer should be accurate to at least three decimal places. IProportion: 0 b) Develop a 99-percent confidence interval estimate for the proportion of defectives in the population. For full marks your answer should be accurate to at least three decimal places.
IConfidence interval: ( 0 , 0 )1