Round z-score to the nearest hundredth and then find the required A values using the table. The amount of time customers spend waiting in line at a bank normally distributed, with a mean of 3.0 minutes and a standard deviation of 7.5 minute. Find the probability that the time a customer spends waiting is as follows. (A) Less than 3.5 minutes and (B) less than 1.5 minutes.

Q: )Listen The average life of a brand of automobile tires is 30,000 miles, with a standard deviation…

A: Here is given that, mean is 30000 and standard deviation is 2000. We will use z-standard normal…

Q: Determine whether the statement is true or false. If it is false, rewrite it as a true statement. As…

A:

Q: The SAT scores for students are normally distributed with a mean of 1030 and a standard deviation of…

A:

Q: A standardized exam's scores are normally distributed. In a recent year, the mean test score was…

A: The following information has been given: Let X be a normally distributed random variable that…

Q: Assume that the readings at freezing on a bundle of thermometers are normally distributed with a…

A:

Q: are normally distributed with

A:

Q: X=21 christmas cards N= 7  standard deviation  Find probability that Americans will recieve no…

A: Given that x=21 S.d=7

Q: Assume that adults have IQ scores that are normally distributed with a mean of μ= 105 and a standard…

A: given data,normal distribution μ=105σ=15probabilty that selected asults has an IDQ score less than…

Q: The area of the shaded region is

A: Consider X denotes the IQ score. X~Nμ=100,σ=15

Q: The average hourly wage for manufacturing workers in the United States is $16.08 per hour, with a…

A: Let  be the hourly wage for manufacturing workers in the United States.The average: The standard…

Q: Financial analysts who make forecasts of stock prices are categorized as either​ "buy-side" analysts…

A: Given data:   ​Buy-Side Analysts (X) ​Sell-Side Analysts (Y) Mean μx=0.84 μy=−0.06 Standard…

Q: Assume that adults have IQ scores that are normally distributed with a mean of μ=105 and a standard…

A: Let "X" be the IQ score of the adults.

Q: The amount of coffee that people drink per day is normally distributed with a mean of 14 ounces and…

A: Determine the distribution of the random variable X follows.   The distribution of the random…

Q: Assume that thermometer readings are normally distributed with a mean of 0  and standard deviation…

A:

Q: d. The standard deviation is e. Find the probability that the time will be at most 13 minutes. f.…

A:

Q: A standardized​ exam's scores are normally distributed. In a recent​ year, the mean test score was…

A: mean (μ)=1543standard deviation (σ)=320 Z- score is given as Z=x-μσ The z- score of 1970 is…

Q: 1C. What amount of time would place a student using the elliptical at the UCF gym in the bottom…

A: It is given that  Mean, μ = 18.9 Standard deviation, σ = 2.15

Q: e amounts of nicotine in a certain brand of cigarette are normally distributed with a mean of 0.952…

A:

Q: 7) The probability a student passes a class is 0.79. If 7 students are randomly selected, find the…

A:

Q: Assume that the readings at freezing on a batch of thermometers are normally distributed with a mean…

A: Here, µ=0°C, σ=1.00°C.

Q: The weights of steers in a herd are distributed normally. The standard deviation is 200lbs. and the…

A: Let "X" be the weight of steers in a herd.

Q: The population mean annual salary for plumbers is $49,000.  A random sample of 25 plumbers is drawn…

A: We have given that Mean(µ) = 49000Standard deviations (σ) = 5800n = 24

Q: A 138.

A: Probability is the method used to obtain the chance of an event happening. It never takes negative…

Q: The lengths of pregnancies are normally distributed with a mean of 268 days and a standard deviation…

A:

Q: Find the standard deviation of the distribution.

A: Let X denote the number of defective parts in one day. The standard deviation of the distribution is…

Q: Assume that thermometer readings are normally distributed with a mean of 0°C and a standard…

A: Assume that thermometer readings are normally distributed with a mean of 0°C and a standard…

Q: The average THC content of marijuana sold on the street is 10.8%. Suppose the THC content is…

A: Given, mean= 10.8  Standard deviation= 1 So, variance= 12=1 So, X~N(mean,variance)= N(10.8,1)…

Q: b. Find the probability that a randomly selected person at the hot springs stays longer then 60…

A: Given that  Mean = M = 62  Standard deviation = SD = 18 X ~ N( M = 62 , SD = 18 )

Q: Private nonprofit four-year colleges charge, on average, $27,363 per year in tuition and fees. The…

A: Given information: μ=27363σ=6865 b) The probability that a randomly selected Private nonprofit…

Q: A survey asked recently retired people how many different employers they had during their working…

A: For the given probability distribution table, mean and standard deviation can be calculated as…

Q: A sample of 9 shoppers at a supermarket is interviewed as they queue at the checkout. The number…

A:

Q: Assume that thermometer readings are normally distributed with a mean of 0°C and a standard…

A: Given data,μ=0σ=1P(1<X<2.25)=?

Q: The average number of kilos of meat a person consumes in a year is 105 kilos. Assume that the…

A: Average (µ) = 105 Standard deviation(σ) = 12 Distribution is approximately normaln = 40 We have to…

Q: Provide an appropriate response. Use the Standard Normal Table to find the probability. IQ test…

A:

Q: Assume that a randomly selected subject is given a bone density test. Bone density test scores are…

A: GivenMean(μ)=0standard deviation(σ)=1

Q: GlenBluss Community College has a population mean GPA is 2.82 with population standard deviation of…

A: Let X be the GPA of college students. Let us assume that X is normally distributed with mean 2.82…

Q: Scores on a test are normally distributed with a mean of 78 and a standard deviation of 6. A student…

A: Given: Mean μ=78 Standard deviation σ=6 A student is selected at random.

Q: On average, indoor cats live to 12 years old with a standard deviation of 2.4 years. Suppose that…

A:

Q: The breaking point of a particular type of rope is normally distributed, with a mean of 310 pounds…

A: Given data,μ=310σ=24

Q: Assume that the readings at freezing on a batch of thermometers are normally distributed with a mean…

A: Method: Normal distribution

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.