Assume that the time used by a baker preparing a birthday cake follows a normal distribution with a mean of 140 minutes and a standard deviation of 40 minutes. The probability is 0.9 that a randomly chosen baker requires more than how many minutes to prepare the birthday cake ? a) 88.8 O b) 46 c) None of the naswers are correct d) 71.6 e) 111.6

Q: The mean annual cost of automobile insurance is $939. Assume that the standard deviation is $245.…

A: Given, Mean(μ)=939 $ standard deviation(σ)=245 $ sample size(n)= 400 find P(939-25 < x¯ <…

Q: The students in a certain high school have an average height of 160 cm with a standard deviation of…

A: mean  μ=160σ=12n=12 x~N(160,12)

Q: Assume that four months are chosen randomly, and determine the probability that at least one of the…

A:

Q: SAT exam scores are normally distributed with mean 500 and standard deviation 100.  Give the…

A: Let X= SAT exam score  Given that X follows normal distribution with mean=500 and standard deviation…

Q: SAT exam scores are normally distributed with mean 500 and standard deviation 100.  Give the…

A: Let X= SAT exam score  Given that X follows normal distribution with mean=500 and standard deviation…

Q: In order to estimate the average time spent per student on the computer terminals at a local…

A: sample size(n) = 81population standard deviation = 1.5 hoursstandard error for mean = ?

Q: automatic machine in a manufacturing process is operating properly if the lengths of an important…

A: Given Data Population Mean,μ = 115.0 Population Standard Deviation,σ = 5.4

Q: A population has a mean of 180 and a standard deviation of 24. A sample of 64 observations will be…

A: Given data, mean=180 sd=24 If n=64 P(183<X<186)=?

Q: Blood glucose levels are normally distributed with a mean of 85 mg/dl and a standard deviation of 25…

A: Answer: Given that:   ‘x’ is Normally distributed with                 Mean  µ =85       standard…

Q: random variable has a mean of 6.5 and a standard deviation of 3.45. With a random sample of 40…

A:

Q: The weights of the fish in a certain lake are normally distributed with a mean of 13lbs and standard…

A: Normal distribution, also known as the Gaussian distribution, is a probability distribution that is…

Q: The average speed of cars passing a checkpoint is 60 miles per hour with a standard deviation of 8…

A: From the provided information,n = 50

Q: Provide an appropriate response. 21) One year, professional sports players salaries averaged $1.9…

A:

Q: What is the probability that the 49 fly balls traveled an average of less than 240 feet?

A: Suppose that the distribution of fly balls hit to the outfield (in baseball) is normally distributed…

Q: 7) Let the random variable Y represent the number of children in a randomly selected household.…

A:

Q: a) 0.0985 b) 0.8815 c) 0.9015 d) 0.7613 Find the indicated probability. Assume that the salaries of…

A:

Q: An automatic machine in a manufacturing process is operating properly if the lengths of an important…

A:

Q: 22. Each American uses 650 pounds of paper a year. Suppose that the distribution is normal with a…

A: It is given that each one uses 650 pounds of paper a year.The distribution is normal with a…

Q: Assume that women’s heights are normally distributed with a mean of 63.6 inches and a standard…

A:

Q: a) The probability that more than 16 ounces is dispensed in a cup is A) 0.1500 B) 0.1587 C) 0.1640…

A:

Q: The average score of all golfers for a particular course has a mean of 75 and a standard deviation…

A: The Z-score of a random variable X is defined as follows: Z = (X – µ)/σ. Here, µ and σ are the mean…

Q: 3. Thermometers in a freezer are normally distributed with a mean of 0 degrees and a standard…

A: Given that the thermometers in a freezer are normally distributed with a mean of degrees and a…

Q: that the heights of students at a university follow a normal distribution with a mean of 170 cm and…

A: It is given that Suppose that the heights of students at a university follow a…

Q: The average price of a Google Chrome book is P21,100. Assuming that the prices approximately normal,…

A:

Q: An automatic machine in a manufacturing process is operating properly if the lengths of an important…

A: (A) Obtain the probability that one selected subcomponent is longer than 119 cm. The probability…

Q: Find the probability that one selected subcomponent is longer than 121 cm.   Probability =  B.…

A: An automatic machine in a manufacturing process is operating properly if the lengths of an important…

Q: automatic machine in a manufacturing process is operating properly if the lengths of an important…

A: Given Data Population Mean,μ = 117.0 Population Standard Deviation,σ = 4.9

Q: ppose that the average song length in America is 4 minutes with a standard deviation of 1.25…

A: As it is known that song length is not normally distributed, this probability cannot be determined…

Q: At one college, GPA's have a distribution that is unimodal and symmetric with a mean of 2.6 and a…

A: Given Mean= 2.6 Standard deviation=0.5

Q: An automatic machine in a manufacturing process is operating properly if the lengths of an important…

A: Given data, μ=113σ=5.7

Q: The probability that a restaurant passes its health department inspection is 0.94. The owners of 58…

A: Binomial distribution :P(X=x)=nCxpxqn−x;0≤x≤nWhere :n : number of trials .p: Probability of…

Q: Two machines are used for filling plastic bottles with a net volume of 16.0 ounces. The fill volume…

A:

Q: An automatic machine in a manufacturing process is operating properly if the lengths of an important…

A: