skip to Main Content

 Observational studies have suggested that low dietary intake or low plasma con

 Observational studies have suggested that low dietary intake or low plasma concentrations of retinol, beta-carotene, or other carotenoids might be associated with increased risk of developing certain types of cancer. However, relatively few studies have investigated the determinants of plasma concentrations of these micronutrients. A cross-sectional study was conducted to investigate the relationship between personal characteristics and dietary factors, and plasma concentrations of retinol, beta-carotene and other carotenoids. Study subjects (N = 315) were patients who had an elective surgical procedure…

A manager of a small fabrication plant must decide on a production schedule of

A manager of a small fabrication plant must decide on a production schedule of two new products for the automobile industry. The unit profit is $20 for product 1 and $70 for product 2.The manufacture of these products depends largely on the availability of certain subassemblies the plant receives daily from a local distributor. It takes two of these subassemblies for each unit of product 1 and also two for each unit of product 2. Twenty such subassemblies are delivered…

Ask yourself, “during the school year, how many hours do I spend, on average on

Ask yourself, “during the school year, how many hours do I spend, on average on school related work per week – for example, reading books, attending class, doing homework, and writing papers. Record your value of estimated hours spent per week. Then ask a random sample of at least 10 students the same question. Test the hypothesis using a = .05 that the average of all the students is the same as yours. Students             Study Hours1                             32                             83                             104                            125                            116                             97                             78                             209                             1710                          5

It is said that Napoleon assessed probabilities at the battle of Waterloo in 18

It is said that Napoleon assessed probabilities at the battle of Waterloo in 1815. His hopes for victory depended on keeping the English and Prussian armies separated. Believing that they had not joined forces on the morning of the fateful battle, he indicated his belief that he had a 90% chance of defeating the English; P(Napoleon Wins=0.9) . When told later that the elements of the Prussian force had joined the English, Napoleon revised his opinion downward on the basis…

The Mayfair Department Store in Davenport, Iowa is trying to determine the amou

The Mayfair Department Store in Davenport, Iowa is trying to determine the amount of sales lost while it was shut down during July and August because of damage caused by the Mississippi River flood. Sales data for January through June follow.Sales ($1000s)January 185.72February 167.84March 205.11April 210.36May 255.57June 261.19a. Use exponential smoothing, with a = .4, to develop a forecast for July and August. (Hint: Use the forecast for July as the actual sales in July in developing the August forecast.)…

The Gatson manufacturing company has estimated the following components for a n

The Gatson manufacturing company has estimated the following components for a new product. Fixed cost = $50,000 Material cost per unit = $2.15 Labor cost per unit = $2.00 Revenue per unit = $7.50 Round your answer to the nearest whole number. 1. Using a spreadsheet model, what will be the resulting profit if the company decides to make 70,000 units of the new product? 2. Construct a one-way data table with production volume as the column input and profit as the output. Breakeven…

A certain test preparation course is designed to help students improve their sc

A certain test preparation course is designed to help students improve their scores on the LSAT exam. A mock exam is given at the beginning and end of the course to determine the effectiveness of the course. The following measurements are the net change in students’ scores on the exam after completing the course:Using these data, construct a confidence interval for the average net change in a student’s score after completing the course. Assume the population is approximately normal.Step 2 of 4 :  Calculate the…

What is the probability that Jim will die in his 60th year? (Enter a number. En

What is the probability that Jim will die in his 60th year? (Enter a number. Enter your answer to five decimal places.)Using this probability and the $50,000 death benefit, what is the expected cost to Big Rock Insurance (in dollars)? (Enter a number. Round your answer to two decimal places.) $ What is the expected cost to Big Rock Insurance for years 61, 62, 63, and 64 (in dollars)? (For each answer, enter a number. Round your answers to two…

1. Ashely is senior at GWU and will be graduating in 3-4 weeks. When she starte

1. Ashely is senior at GWU and will be graduating in 3-4 weeks. When she started at GWU in the Fall of 2014, she decided to use an index for her basic spending for each semester. She compiled her data at the end each semester (after the final exams). Her data (fictitious) is provided below                       Item                Cost                Quantity2014-Fall        Textbooks      $100               6                       Pizza               $15                 30                       Personal         $50                 52015-Spring   Textbooks      $120               5                       Pizza               $12                 25                       Personal         $50                 52015-Fall        Textbooks      $110               7                       Pizza               $20                 20                       Personal         $50                 72016-Spring   Textbooks      $100               4                       Pizza               $18                 25                       Personal         $100               82016-Fall        Textbooks      $150               4                       Pizza               $15                 30                       Personal         $100               42017-Spring   Textbooks      $150               5                       Pizza               $15                 10                       Personal         $80                 82017-Fall        Textbooks      $150               8                       Pizza               $15                 20                       Personal         $80                 102018-Spring   Textbooks      $N/A              N/A                       Pizza               $N/A              N/A                       Personal         $N/A              N/A1.    Compute Simple price index for textbook for Fall of 2017. Use Fall of 2014 as the base. (1 pt)2.    Compute Lasperyres and…

The number of flaws per square yard in a type of carpet material varies with me

The number of flaws per square yard in a type of carpet material varies with mean 1.5 flaws per square yard and standard deviation 1.3 flaws per square yard. An inspector studies 100 square yards of the material, records the number of flaws found in each square yard, and calculates the mean number of flaws per square yard inspected. what is the mean of the sampling distribution of the sample mean. What is standard deviation of the sampling distribution of…