To reduce laboratory​ costs, water samples from two public swimming pools are combined for one test for the presence of bacteria. Further testing is done only if the combined sample tests positive. Based on past​ results, there is a 0.009 probability of finding bacteria in a public swimming area. Find the probability that a combined sample from two public swimming areas will reveal the presence of bacteria. Is the probability low enough so that further testing of the individual samples is rarely​ necessary?

Q: The probability of a randomly selected adult in one country being infected with a certain virus is…

A:

Q: Charlie wishes to investigate the effects of gummy bears which have been claimed to help increase…

A: The null hypothesis claims that there is no difference between the speeds, so the ratio of speed…

Q: It has been shown by claims that have been made that 20% of parcels arrive damaged when using an…

A:

Q: A study reported that about 40% of high school students have tried out for a sport at their school.…

A: Proportion is almost similar to the concept of probability. Proportion is a fraction of a population…

Q: A medical researcher claims that 60% of people with shellfish allergies do not have their first…

A: The line of random numbers is 064226149126030872472050368603.

Q: Hotel attendants have to check guests’ IDs because there is probably a law about that.  Employees do…

A:

Q: A jar contains green wrapped candies and yellow wrapped candies.  A person selects two wrapped…

A:

Q: The probability of flu symptoms for a person not receiving any treatment is 0.058. In a clinical…

A: Given Information: The probability of flu symptoms for a person not receiving any treatment is…

Q: Physicians at a clinic gave what they thought were drugs to 850 asthma, ulcer, and herpes patients.…

A: Solution-: Given: We find p-value=?

Q: A study showed that ​69.7% of occupants involved in a fatal car crash wore seat belts. Of those in a…

A:

Q: . To see if this result is surprising, the class conducts a simulation to estimate the probability…

A:

Q: n a genetics experiment on​ peas, one sample of offspring contained  424 green peas and  502 yellow…

A: Given data  424 green peas 502 yellow peas __________________ 926 total peas   select one at random…

Q: One source approximates that 39% of Canadian nationals identify as Catholic, 73.4% of Mexican…

A: Given information: PC|Can=0.39. PC|Mex=0.734. PC|Ame=0.211 The event C indicates the selected people…

Q: She then conducts a hypothesis test to see whether there is significant evidence to conclude that…

A: The hypotheses can be constructed as: H0: The speeds are the same i.e. no effect from ingesting…

Q: On average, hotel guests who take elevators weigh about 160 pounds with an SD of about 40 pounds. An…

A: Consider that the mean and standard deviation of a random variable X are µ and σ, respectively.…

Q: If the probability of contracting a certain illness is 0.0433, would it be considered statistically…

A: Let p be the probability of contacting a certain illness  Given  p=0.0433

Q: In an automated filling operation, when the process is run at slow speed, the probability of an…

A: Let Event X denote the incorrect fill. and Event Y denote the high speed process   P (X/Y) = 0.001 P…

Q: High blood pressure has been identified as a risk factor for heart attacks and strokes. The National…

A: Given data: p = 0.3 n = 38

Q: An experimental drug has been shown to be 75% effective in eliminating symptoms of allergies in…

A: Obtain the probability that the drug is effective on half of the participants. The probability that…

Q: If a particular shipment of thousands of aspirin tablets actually has a 44​% rate of​ defects, what…

A: It is given that aspirin tablets have a 44% rate of defects. That is probability of getting a…

Q: A well-mixed cookie dough will produce cookies with a mean of 6 chocolate chips apiece. What is the…

A: Given problem is poisson distribution Mean=6

Q: Find the expected value.

A: Let X denote the rush X = 80 with a probability of 0.35  and X = 60 with a probability of 0.65…

Q: A study showed that the sex ratio of children born to families in a native community of Ontario…

A: A study showed that the sex ratio of children born to families . Given: A news paper report about…

Q: A medical researcher claims that 60% of people with shellfish allergies do not have their first…

A: The random sampling method is one of the sampling method. In this method, the elements of sample are…

Q: Mathew is pleased to see a positive difference in the pilot sample, but Russell is cautious about…

A: Mathew is pleased to see a positive difference in the pilot sample, but Russell is cautiousabout…

Q: What is the expected value for the number of defective LCD

A: The number of LCDs (n) is 5.

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.