Los Angeles workers have an average commute of 34 minutes. Suppose the LA commute time is normally distributed with a standard deviation of 12 minutes. Let X represent the commute time for a randomly selected LA worker. Round all answers to 4 decimal places where possible. a. What is the distribution of X? X- N b. Find the probability that a randomly selected LA worker has a commute that is longer than 37 minutes. c. Find the 80th percentile for the commute time of LA workers. minutes

Q: The administration at Warmfuzzy University gave a 7-item questionnaire to a representative sample of…

A: N is the total number of observations.∑X is the summation of the total observations.

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: The distribution of the IQ (Intelligence Quotient) is approximately normal in shape with a mean of…

A: Given information: μ=100σ=15 Standard deviation rule: 68% of the data lies between μ-σ,μ+σ95% of the…

Q: Find the mean, median, mode, range, variance, and standard deviation for the following data, which…

A:

Q: The following data give the prices (in thousands of dollars) of 6 homes that were sold in a small…

A: Solution: Let X be the price. The given data is 195, 205, 219, 265, 283 and 825.

Q: Which of the following statistics would be helpful for measuring dispersion? (the spread

A: Given problem Given that   Which of the following statistics would be helpful for measuring…

Q: b. Find the probability that a randomly hit fly ball travels less than 330 feet. Round to 4 decimal…

A:

Q: find the mean, standard deviation, the IQR, and tell how the data is skewed, if it is. using the…

A: If the distribution is divided into two parts and the two sides are a mirror image of each other,…

Q: (Simplify your answer.) (Simplify your answer.)

A: It is given that  Mean, μ = 73 Standard deviation, σ = 6 Sample size, n = 36

Q: The following table shows the number of people that have either 0, 1, 2 or 3 cars registered in…

A: The provided information is as follows:The total number of samples is .The data is given as…

Q: The accompanying data are 45 commute times to work in minutes for workers of age 16 or older in…

A: First, we need to organize the data in ascending order. This will make it easier to count the…

Q: Before the furniture store began its ad campaign, it averaged 213 customers per day. The manager is…

A: D.   Consider that μ defines the population mean number of customers.   Here, it is needed to check…

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: the mean is 146, and standard deviation is 35. A score of 181 is how many z-scores above the mean?

A:

Q: The table below gives the annual income for eight families, in thousands of dollars. Find the number…

A: Given : Family A B C D E F G H Income 51 53 52 50 49 50 47 48

Q: can be considered as the mid point of the distribution. Select one: a. mode b. none of these C. mean…

A: Median = Middle number of the sorted data.  Mean = Sum of all observation / total number of…

Q: The frequency distribution was obtained using a class width of 0.5 for data on cigarette tax rates.…

A: Given , the frequency distribution,  we need to find the population mean and population standard…

Q: The salaries of 1200 pro athletes form a normal distribution with a mean of $79,000 and a standard…

A: For the distribution of the salaries (in $) of 1200 pro athletes, which is defined to be normally…

Q: Suppose that insurance companies did a survey. They randomly surveyed 400 drivers and found that 310…

A: Given: Sample size (n) =400 Number of  drivers claimed (x) = 310

Q: Find the indicated IQ score. The graph to the right depicts IQ scores of adults, and those scores…

A:

Q: Which of the following data sets has the smallest standard deviation? a. 1, 2, 3, 4, 5 b.…

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.