4. A simple random sample of the weight of 40 women has a mean of 146.22 lb. Research from other sources suggests that the population standard deviation of weight of women is
30.86 lb. Find a 95% confidence interval estimate of the mean weight of all women.
132.11 lb << 160,33 lb
141.58 lb << 150.86 lb
136.66 lb < p < 155.78 lb
138.19 lb

Type the correct answer in the box. use numerals instead of words. if necessary, use / for the fraction bar. a city water tank holds 20 gallons of water. a technician empties 25% of the tank. how many more gallons of water must be removed from thetank so that it has 5 of the water that it started with: the technician must removemore gallons of water for the tank to have 5 of the water that it started with.