### Statistical question - Why is population shape of concern when estimating a mean? What does sample size have to do with it?

Why is population shape of concern when estimating a mean? What does sample size have to do with it?

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Why is population shape of concern when estimating a mean? What does sample size have to do with it?

Weights of regular coke. Using sample data on the weights of coke, we find that the mean is 0.81682 lbs., the standard deviation is 0.00751 lbs, and the distribtution is approx. bell-shaped. Using the empirical rule, what is the approx percentage of cans of regular coke with weights between 0.80931 lbs. and 0.82433 lbs?

120 Professional Hrs 150 Professional Hrs Type of cost Salaries Sr. Accountant $2500 $2500 Fixed Office assistant $1200 $1200 Fixed Internet and software subscriptions $700 $850 Mixed Consulting by Sr Partner $1200 $1500 Variable Depreciation 2400 2400 Fixed Supplies 905 1100 Mixed Administration 500 500 Fixed Rent

Flee Market Bargains sells cartoon watches that have a cost of $10.00. All unsold watches may be returned to the supplier. Booth rental costs $ 100.00 for the day. The selling price of the watches is $20.00. Use the above information to calculate the number of watches (units) and the sales dollars we need in order for our flea

Hamburger Joe's sells the best burgers in town. The variable unit cost for making one burger is $.97. The fixed cost of making burgers for 12 months will be a total of: $140,000. Remember, fixed costs cover things like your rent, your phone bill, and insurance coverage - these items tend not to vary in amount per month over the

The UN must evacuate an aid team and their belongings from Iraq. They can hire two types of planes to handle the evacuation. One is an Airbus 201 which can handle 25 passengers and 10 tons of cargo for $800 per day. The other is a Boeing 179 which can handle 40 passengers and 4 tons of cargo at a cost of $1000 per day. The ev

Administrators at a university are planning to offer a summer seminar. It costs $3000 to reserve a room, hire an instructor, and bring in the equipment. Assume it costs $25 per student for the administrators to provide the course materials. If we know that 20 people will attend, what price should be charged per person to break e

What is your age today? Explain why the descriptive stats could be important to your college, how might the college use the info to determine their market. ... [Please see the attached Question File.]

During the "Spring Fling", the bumper car amusement attraction has a problem of cars becoming disabled and in need of repair. Repair personnel can be hired at the rate of $20 per hour, but they only work as one team. Thus, if one person is hired, s/he works alone whereas two or three people would work together on the same broken

The problem is about Roche brothers expanding their super market - and the incremental cash flows associated with it

A company distributes a printed guide for the approximate 22,000 visitors it has each year. Holding costs for the brochures are 10% of purchase cost - and it costs $30 to place an order with the printer (unless you order the largest discount category in which case the order cost drops to $25). . The printer has a discounted p

The internal revenue service is auditing the operators of some 13,000 private airports by taking a random sample of 100 of them. The IRS discovers an average error in reported taxable income of $14,750, and the population standard deviation is known to be $3,600. Determine a 90 percent confidence interval for the average error

A team of introductory statistics students (with too much free time) when to Marsh and recorded the calories and fat for various kinds of soup. Write a succinct summary of the central tendency, dispersion, and shape of the data. [See the attached Data File.]

Listed on the MEGASTAT attachment is the average daily circulation for the 50 U. S. newspapers with the largest circulation. Please show all work/outputs. a. Find the mean, median, Q1, and Q3. b. Find the 15th and the 90th percentiles. c. Find the coefficient of skewness and interpret the result. d. Develop a box plot a

Please see the attachment. 12. Table 1. Results of a screening test for diabetes, using a cutoff point of 160 mg.dl. True Diagnosis Test result Diabetic Not Diabetic Total Positive 34 20 54 Negative 116 9,830 9,946 Total 150 9,850 10,000 The specificity of the screening test for diabetes is a. 0.3% b.

Considering all of the day to day activities you are engaged in at work and in your personal lives, write a 200 (or more) word paper that describes at least three (3) different statistical usages that you see regularly. For each, describe how the statistics enhance the understanding of an issue or problem for the reader. Finally

Please see attachment.

2. What is the level of measurement for these items related to the newspaper business? (page 14) a. The number of papers sold each Sunday during 2004. b. The departments, such as editorial, advertising, sports, etc. c. A summary of the number of papers sold by county. d. The number of years with the paper for each employee

Use the following problem to determine the binding constraints for the optimal solution. MAX P = 30X + 40Y 4X + 2Y < 16 A 2X - Y > 2 B Y < 1 C X , Y > 0 Constraint A Constraints

Cal and Becky have known each other since high school. Two years ago, they entered the same university, and today they are taking undergraduate courses in the business school. Both hope to graduate with degrees in finance. In an attempt to make extra money and to use some of the knowledge gained from their business courses, C

2. A math test was given with the following results: 80, 69, 92, 75, 88, 37, 98, 92, 90, 81, 32, 50, 59, 66, 67, 66 Find the range, standard deviation, and variance for the scores. 3. For a particular sample of 50 scores on a psychology exam, the following results were obtained. Mean = 78 Midrange = 72 Third quartile = 94

Please answer the problem below and show the work-steps to how the answers were derived. ________________________________________________________________________ Markland Manufacturing intends to increase capacity by overcoming a bottleneck operation by adding new equipment. Two vendors have presented proposals. The fixed

A drug manufacturer wants to estimate the effect of its new drug designed to increase patients white blood cell count. How many sample runs of the drug must be performed to ensure that the estimate is accurate to within 50 cells (per microliter of blood) at 95% confidence? Assume the population standard deviation to be 110 cells

19. A group of statistics students decided to conduct a survey at their university to find the average (mean) amount of time students spent studying per week. Assuming a standard deviation of 6 hours, what is the required sample size if the error is to be less than ½ hour with a 95% level of confidence? 20. A survey of

Please provide an answer to the problem below and make sure to show all the work as to how the answer was derived. ------------------------------------------------------------------------ Barbara Flynn is in charge of maintaining hospital supplies at General Hospital. During the past year, the mean lead time demand for b

I am having trouble with a question for queuing: A single-server queuing system with an infinite calling population and a first-come, first-served queue discipline has the following arrival and service rates: µ= 24 customers per hour λ; = 16 customers per hour Determine: L Lq W Wq P0 P3 U Please show i

Small-cap mutual funds gained an average of 8.4% in the first half of 2000. Assume that the distribution of returns in the first half of 2000 for mutual funds specializing in small companies is distributed as a normal random variable with a mean of 8.4% and a standard deviation of 10%. The return for 90% of small company mutua

Given the below activities which activities are on the critical path? What is the length of the critical path? Activity Immediate Predecessors Time (days) A - 3 B A 4 C

Always get overwhelmed by the amount of material when covered at a comprehensive level. Attached is the study material of what to be prepared to cover at the conclusion of this course. I have worked through them but get stumped at several points. Can you provide a systematic approach to these problems and provide a reference to

1. A regulatory agency claims the mean weekly telemarketing calls a citizen receives is 18 or less. A consumer advocacy group surveyed 81 citizens and found that the mean number of calls they received weekly was 19. At a level of significance of alpha = 0.05 is there sufficient evidence to reject the agencies claim? Assume