In a study of 420,000 cell phone users in Denmark, it was found that 135 developed cancer of the brain or nervous system. Estimate the probability that a randomly selected cell phone user will develop such a cancer. Is the result very different from the probability of 0.000340 that was found for the general population? What does the result suggest about cell phones as a cause of such cancers, as has been claimed?

Q: he heights of 18-year-old men are normally distributed with a mean of 67 inches and a standard…

A: Given data,μ=67σ=3If n=9P(66<X<68)=?

Q: Among the workers at a large factory, the number of sick days taken per year is normally…

A: Given that, Among the workers at a large factory, the number of sick days taken per year is normally…

Q: Based on information from a large insurance company, 68% of all damage liability claims are made by…

A: Given that  Sample size n =54 Favorable cases x =41

Q: In Spring 1990, John enrolls in 9, 12, 15 or 18 credit hours with probabilities 0.1, 0.3, 0.4 and…

A: Solution: Let X be the number of hours enrolled for John. From the given information, the…

Q: The mean production of workers in a certain factory is 10 products per hour with a standard…

A: Let production of workers in a certain factory = X μ = 10 σ = 1.5 X ~ N(10, 1.52)

Q: The diameters of apples grown in an orchard are normally 3.4 and standard deviation 0.4 inches. (a)…

A: Mean μ=3.4 Standard deviation σ=0.4

Q: Suppose that the weight of a particular brand of cereal in boxes labeled "12 oz" is normally…

A: The formulae for z-score is as follows below:                                    z = x-μσ where μ is…

Q: cturer claims that the life span of its tires is 48,000 miles. You work for a consumer protection…

A:

Q: A manufacturer claims that the life span of its tires is 48.000 miles, You work for a consumer…

A: Given that, Let, X be life spans of tires A manufacturer claims that life span of tires is 48000…

Q: The height of women in the United States is normally distributed with mean 64.5 inches and standard…

A: Given Information: Women: Mean μ=64.5 Standard deviation σ=2 Men: Mean μ=70 Standard deviation σ=1.5

Q: A local church parish wants to raise money to add to their campus. In a sample from a previous fund…

A: This problem can be solved by finding z value.

Q: Among the workers at a large factory, the number of sick days taken per year is normally…

A: Solution

Q: A company produces light bulbs with a mean lifetime of 800 hours and a standard deviation of 100…

A:

Q: A census of the labor force in a large metropolitan area found that the time is takes for people to…

A:

Q: Suppose that the life span of a new calculator is normally distributed with mean 54.4 months and…

A:

Q: The population frequency of Down’s syndrome children born to 25 yr old females is 1/1000. However if…

A: Let event D be a child has down syndrome so PD=11000,PD'=9991000 Let the event N, be that the child…

Q: The height of 12-year-old children is considered to be continuous random variable which obeys a…

A: Mean()=125Standard deviation()=15

Q: According to a report from a business intelligence​ company, smartphone owners are using an average…

A: Mean(μ)=22standard deviation(σ)=7sample size(n)=25

Q: For all of the California Community Colleges, the population of full-time faculty members have a…

A: According to the given information, we have Given that the ages of full-time faculty members is…

Q: The unfair coin (p=Prob(head)=0.4, q=Prob(tail)=1-p=0.6) is tossed 100 times. Find the probability…

A: Continuity correction factor table: If   P(X=n) use   P(n – 0.5 < X < n + 0.5)If   P(X > n)…

Q: What is the likelihood of a randomly selected individual from a given population having a genetic…

A:

Q: he Northside Racquetball Club is planning to have a championship tournament. They must use Seamtight…

A:

Q: A gasoline tank for a certain model car is designed to hold 15.6 gallons of gas. Suppose that the…

A: Let X be the gas tank of randomly selected car Given Data: mean=15.6 standard deviation=0.3…

Q: Supposed that the mean age of the employees of warrior's corporation is 45.5 years and the standard…

A:

Q: In october 2012, apple introduced a much smaller variant of the apple ipad, known as the ipad mini.…

A:

Q: Assume that the mean daily amount of water consumed by females between the ages of 16 and 30 is 26…

A: normal distributionμ = 26σ = 8.5

Q: For people over 50 years old, the level of glucose in the blood (following a 12 hour fast) is…

A:

Q: The average recovery of an Anterior Cruciate Ligament (ACL) tear after operation ranges from 6 to 12…

A:

Q: The average speed of vehicles traveling on a stretch of highway is 67 miles per hour with a standard…

A: 2. Suppose the random variable X defines the speed of vehicles traveling on a stretch of highway.

Q: Shomee is rolling a die repeatedly. What is the probability that a six will emerge for the first…

A:

Q: newborn baby is classified as having Extremely Low Birth Weight (ELBW) if it weighs less than 1000…

A:

Q: A census of the labor force in a large metropolitan area found that the time it takes for people to…

A:

Q: Suppose weights, in pounds, of dogs in a city have an unknown distribution with mean 80 and standard…

A: We have given that  Mean =80 Standard deviation =12 Sample size n =87

Q: Samuel F.B. Morse (1791 – 1872), the creator of Morse Code, claimed that 12% of all letters used in…

A:

Q: The restaurant in a large commercial building provides coffee for the building’s occupants. The…

A: Let X be the number of cups of coffee consumed per day. It is given that X is normally distributed…

Q: Assuming the fasting blood glucose level among diabetics is normally distributed with mean 106 mg /…

A: Population mean=100Population standard deviation=10

Q: The Flamerock Tire Company manufactures a particular tire model that has a mean lifetime of 65,000…

A: Answer: From the given data, Mean (μ) = 65000 standard deviation (σ) = 4500 X follows normal…

Q: The height of women ages 20-29 is normally distributed, with a mean of 64.8 inches. Assume o = 2.4…

A:

Q: What is the likelihood, based on historical data and current trends, that a randomly selected…

A:

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.