Suppose that 20% of the otters in a large aquatic community are typically infected with a...
Suppose that 20% of the otters in a large aquatic community are typically infected with a parasite. A biologist samples 16 otters at random and records for each if the animal is infected with the parasite. What is the probability more than 50% of the sampled otters are infected?
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Suppose that 20% of the otters in a large aquatic community are
typically infected with a...
In a certain population of mussels (Mytilus edulis), 80% of the individuals are infected with an...
In a certain population of mussels (Mytilus edulis), 80% of the individuals are infected with an intestinal parasite. A marine biologist plans to examine 100 randomly chosen mussels from the population. a) Find the probability that 85% or more of the sampled mussels will be infected using normal approximation to binomial distribution. b) What is the expected number of infected mussels in 50 randomly chosen mussels?
Suppose the horses in a large stable have a mean weight of 873lbs, and a variance...
Suppose the horses in a large stable have a mean weight of 873lbs, and a variance of 17,161. What is the probability that the mean weight of the sample of horses would differ from the population mean by greater than 15lbs if 50 horses are sampled at random from the stable? Round your answer to four decimal places
Suppose babies born in a large hospital have a mean weight of 3366 grams, and a...
Suppose babies born in a large hospital have a mean weight of 3366 grams, and a variance of 244,036. If 118 babies are sampled at random from the hospital, what is the probability that the mean weight of the sample babies would differ from the population mean by more than 45 grams? Round your answer to four decimal places.
Exercise 1: Mussels are Canada's top shellfish aquaculture product, produced in Newfound- land and Labrador, Nova...
Exercise 1: Mussels are Canada's top shellfish aquaculture product, produced in Newfound- land and Labrador, Nova Scotia, Prince Edward Island and Quebec. Mussels filter the sea water between their shells and accumulate viral, bacterial, and parasitic pathogens in their tissues. Among the mussels collected from a certain Canadian coastline 80% are infected with a parasite. A biologist examines 120 randomly selected mussels in this region. What is the probability that more than 86% of the mussels in this sample are...
1) Suppose a bag contains 50 red balls, 30 green balls and 20 blue balls. (a)...
1) Suppose a bag contains 50 red balls, 30 green balls and 20 blue balls. (a) If you draw 2 balls at random without replacement, what is the probability that they are red and green? (b) If you draw 3 balls at random without replacement, what is the probability that all 3 are of different colour? (c) If you draw 3 balls at random without replacement, what is the probability that you draw at least 1 red ball? 2) A...
Suppose cattle in a large herd have a mean weight of 1228lbs and a variance of...
Suppose cattle in a large herd have a mean weight of 1228lbs and a variance of 8100. What is the probability that the mean weight of the sample of cows would be greater than 1240lbs if 115 cows are sampled at random from the herd? Round your answer to four decimal places.
When they send out their fundraising letter, a philanthropic organization typically gets a return from about...
When they send out their fundraising letter, a philanthropic organization typically gets a return from about 5% of the people on their maling list To see what the response rate might be in the future, they did a simulation using samples of size 20, 50, 100, and 200. For each sample size, they simulated 1000 mailings with success rate p 0.05 and constructed the histogram of the 1000 sample proportions, as shown in the accompanying table. Explain how these histograms...
Suppose the horses in a large stable have a mean weight of 807lbs, and a variance...
Suppose the horses in a large stable have a mean weight of 807lbs, and a variance of 5776. What is the probability that the mean weight of the sample of horses would differ from the population mean by greater than 18lbs if 41 horses are sampled at random from the stable? Round your answer to four decimal places.
Suppose cattle in a large herd have a mean weight of 1217lbs and a variance of...
Suppose cattle in a large herd have a mean weight of 1217lbs and a variance of 10,404. What is the probability that the mean weight of the sample of cows would differ from the population mean by less than 11lbs if 116 cows are sampled at random from the herd? Round your answer to four decimal place.
Suppose cattle in a large herd have a mean weight of 1158lbs1158lbs and a standard deviation...
Suppose cattle in a large herd have a mean weight of 1158lbs1158lbs and a standard deviation of 92lbs92lbs. What is the probability that the mean weight of the sample of cows would differ from the population mean by less than 12lbs12lbs if 5555 cows are sampled at random from the herd? Round your answer to four decimal places.
In a certain population of mussels (Mytilus edulis), 80% of the individuals are infected with an intestinal parasite. A marine biologist plans to examine 100 randomly chosen mussels from the population. a) Find the probability that 85% or more of the sampled mussels will be infected using normal approximation to binomial distribution. b) What is the expected number of infected mussels in 50 randomly chosen mussels?
Exercise 1: Mussels are Canada's top shellfish aquaculture product, produced in Newfound- land and Labrador, Nova Scotia, Prince Edward Island and Quebec. Mussels filter the sea water between their shells and accumulate viral, bacterial, and parasitic pathogens in their tissues. Among the mussels collected from a certain Canadian coastline 80% are infected with a parasite. A biologist examines 120 randomly selected mussels in this region. What is the probability that more than 86% of the mussels in this sample are...
When they send out their fundraising letter, a philanthropic organization typically gets a return from about 5% of the people on their maling list To see what the response rate might be in the future, they did a simulation using samples of size 20, 50, 100, and 200. For each sample size, they simulated 1000 mailings with success rate p 0.05 and constructed the histogram of the 1000 sample proportions, as shown in the accompanying table. Explain how these histograms...
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