Question

part 1.

You measure 24 dolphins' weights, and find they have a mean weight of 36 ounces. Assume the population standard deviation is 13.2 ounces. Based on this, construct a 95% confidence interval for the true population mean dolphin weight.

Give your answers as decimals, to two places

part 2.
Linda draws a heart from a standard deck of 52 cards. She returns the heart to the deck, then draws a second card. Her second card is a spade.

1. Are these events independent?
   1. Input Yes or No:

1. Determine the probability of drawing a heart and then a spade withreplacement.
   Write your answer in decimal form, rounded to two decimal places as needed.
   1. Answer =
      
      PART 2.
      The nurse at the elementary school decided to collect data on the students that come to see her throughout the day for symptoms of a sore throat, stomachache, or headache. The table below summarizes her results.
      

      	Sore Throat	Stomachache	Headache	Total
      Male	2	5	12	19
      Female	10	20	19	49
      Total	12	25	31	68

      
      
      If one student is chosen at random,
      
      Find the probability that the student was male OR had a "Headache". Express as decimal rounded to two places.

Answer 1