Please note this is all one problem CNNBC recently reported that the mean annual cost of auto insurance is 993 dollars. Assume the standarddeviation is 275 dollars, and the cost is normally distributed. You take a simple random sample of 15 autoinsurance policies. Round your answers to 4 decimal places.a. What is the distribution of X? X - N(b. What is the distribution of z? a - N(c. What is the probability that one randomly selected auto insurance is more than $971?d. a simple random sample of 15 auto insurance policies, find the probability that the average cost is morethan $971.e. For part d), is the assumption of normal necessary? O Yes No

Given Mean annual cost of auto insurance=μ=$993 Standard deviation =σ=$275 Let X be cost of auto…

Answered: CNNBC recently reported that the mean…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Sarah studies Business and Management and she also has a part-time job as a waitress at a restaurant. The restaurant does not include service charges in their bills, and therefore Sarah often receives tips from the customers. Some customers give her very generous tips, while others leave hardly anything or nothing at all. Sarah began to wonder what the size of the tip may depend on. Just out of curiosity, she started to keep a record of the total prices on the bills and the tips she received. At first, she fit a simple linear regression model to the data and found that the size of the tip was significantly related to the total price. But at this point, she speculated that the tips may be affected by other factors as well, and an even better model could possibly be constructed by including further independent variables. For instance, the chef who prepares the dish(es) might affect the customers' satisfaction. The restaurant employs three chefs: Richard, Thomas, and Linda. Sarah decides…
Sarah studies Business and Management and she also has a part-time job as a waitress at a restaurant. The restaurant does not include service charges in their bills, and therefore Sarah often receives tips from the customers. Some customers give her very generous tips, while others leave hardly anything or nothing at all. Sarah began to wonder what the size of the tip may depend on. Just out of curiosity, she started to keep a record of the total prices on the bills and the tips she received. At first, she fit a simple linear regression model to the data and found that the size of the tip was significantly related to the total price. But at this point, she speculated that the tips may be affected by other factors as well, and an even better model could possibly be constructed by including further independent variables. For instance, the chef who prepares the dish(es) might affect the customers' satisfaction. The restaurant employs three chefs: Richard, Thomas, and Linda. Sarah decides…
Just need part D
The difference of two real numbers is d, where d is a fixed number. What two numbers will minimize the product?
Please answer ASAP
In an area of the Great Plains, records were kept on the relationship between the rainfall (in inches) and the yield of wheat (bushels per acre). The table shows the number of inches of rainfall and the yield (in bushels per acre). Use for problem #17 and #18. Rainfall (in inches), x 9.8 8.1 12.7 11.8 18.1 9.6 6.3 14.9 15.3 Yield (bushels per acre), y 48.5 44.2 56.8 57 80.4 47.2 29.9 74 76.8 17. Compute the linear correlation coefficient between the two variables above. (Round to thousandths.) 18. Determine whether a linear relation exists. (Show work to justify answer.)
Netflix made headlines in September 2011 when it split its streaming video service and its DVD by-mail service into two companies. This decision was based on projections that streaming videos will replace DVDs in the future. In this problem, you will explore these projections. Numbers below are close to the correct values, but vary to allow more practice with this idea. Total DVD and Blu-ray disc sales in 2009 were $8.72 billion. For the purposes of this problem, you will combine DVD and Blue-ray disk sales into one category of DVD sales. A study by In-Stat predicted that "physical disc sales will decline by $4.7 billion by 2014," and that "streaming, on the other hand, should grow from its current $2.1 billion to $6.3 billion over the same time period (2009–2014)." What is the slope, including units, of the model for streaming videos?
The battle to life achievement requires a lot of patience. Patience is accepting the ups and downs in life. An individual's maturity is measured by how long he can wait and battle between achievement and reward. The enjoyment to a reward is increased when one has waited a long time to receive it. Life is just like a carousel ride. One experience the ups and downs of the ride and a starting point or an initial ride and when time comes, the ride now terminate. A carousel ride can be repeated and be experienced once more if one decided to continue the ride. The experience depends on a person's choice to where he will sit. Some prefers on the outside or others on the inside row but still they will stop on the same point to where they can descend. One summer, you and your friend decided to go to an amusement park and ride the carousel. You always select a horse on the outside row while your friend chose the row closest to the center. These rows are 6 meters and 4 meters from the center,…
A certain magical substance that is used to make solid magical spheres costs $500 per cubic foot. The power of a magical sphere depends on its surface area, and a magical sphere can be sold for $50per square foot of surface area. If you are manufacturing such a sphere, what size should you make them to maximize your profit per sphere?

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