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Descriptive Statistics

Control Limits for Computer Chips

The smallest defect in a computer chip will render the entire chip worthless. Therefore, tight quality control measures must be established to monitor the chips. In the past, the percentage defective for these chips has been 1.1%. The sample size is 1,000. Determine the upper and lower control chart limits for these computer

Responses to Statistic Surveys

1. To what extent do the respondents agree with the statement "I attach great importance to credit cards? (1m)" (Give the percentage value of respondents that "strongly agree" and "agree" with the statement). 2. What is the main reason that most respondents didn't respond to any offer? Please show the frequency table and hist

Promoting the Keem Dishwashing Soap

The advertising agency promoting the new Keem dishwashing soap wants to get the best exposure possible for the product within the $100,000 advertising budget ceiling placed upon it. To do so, the agency needs to decide how much of the buget to spend on each of its two most effective media;(1) television spots during the afternoo

Mean, Median and Standard Deviation and Interpreting Data

Refer to the CIA data, which reports demographic and economic information on 46 countries. a. Select the variable Life Expectancy 1. Find the mean, median and the standard deviation 2. Writer a brief summary of the distribution of life expectancy. Life Expectancy Luxenbourgh - 77.3 Mexico 71.76 Netherlands 78.43 New Z

Seasonal Indexes: Multiplicative Model

The monthly sales volume (in thousands of dollars) for a manufacturer of snow skis is seasonal (there tend to be more skis sold during fall and winter months than during warmer months). The following table shows the monthly seasonal indexes for the company's sales: JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC 1.17 1.0

Histograms, Mean, Median and Mode

1) Over the past several months, customers at Stymie's department store have been asked to fill out customer satisfaction surveys. In the surveys, the customers rate their shopping experience on a scale of 0 to 100. Here are 25 recent ratings: 13, 16, 16, 21, 24, 33, 34, 37, 41, 45, 45, 49, 51, 56, 56, 56, 58, 61, 66, 70, 76,

Important information about Statistics in Psychology

1. A sample of 10 high school students completed a course designed to increase SAT verbal scores. The following is the summary for this group's SAT verbal scores after completion of the course: Σx= 5846, Σx2 =3428148. a. What is the mean and standard deviation for this groups' SAT verbal score? b. What scores mark the

Average Cost

In a slow year, Deutsche Burgers will produce 2 million hamburgers at a total cost of $3.5 million. In a good year, it can produce 4 million hamburgers at a total cost of 4.5 million. a. What is the average cost per burger when the firm produces 1 million hamburgers? b. What is average cost when the firm produces 2 mill

Economic Order Quantity

Southeastern Bell stocks a certain switch box at its central warehouse for supplying field service offices. The yearly demand for these connectors is 15,000 units. Southeastern estimates its annual holding costs for this item to be $25 per unit. The cost to place and process an order from the supplier is $75. The company operate

EOQ model: what value of ordering cost is optimal?

Henry Crouch's law office has traditionally ordered ink refills at 60 units a time. The firm estimates that carrying cost is 40% of the $10 unit cost, and that annual demand is about 240 units per year. The assumptions of the basic EOQ model are thought to apply. For what value of ordering cost would its action be optimal?

Find dependent and independent variables

Variables and Level of Measurement: Identify the dependent and independent variables used in this paper, and their level of measurement (attribute or numeric). Week 2 paper will only have a Dependent Variable. Length: One sentence per variable. I have attached the data to answer the question

Nominal and Ordinal Data

Survey Paper Using the business problem selected ( business, economic or marketing)develop a problem statement which can be addressed with survey research. Prepare a 10-13-question survey to collect primary data regarding your selected problem statement. . Your survey questions should include a mixture of categorical (nomina

Five Step Hypothesis Test for Statistics

Perform a five-step hypothesis test on data below: Below is the descriptive Stats I used to get the mean I used in the numerical hypothesis Descriptive statistics Through 13 years of education Wage count 67 mean 25,386.07 sample variance 132,209,364.95 sample standard deviation 11,498.23 minimum 9879

Optimal production levels, length of production cycle, and costs.

7. Your company manufactures turbine blades for engines in production batches for each type. For one type of blade, the A39T, you have an annual demand of 10,000 units. It costs you $1000 and takes four days to set up each manufacturing run. Holding (storage) cost is $0.50 per unit per year. Once production is set up, 80 uni

Statistical analysis in Minitab

From past experiences, Prof. A believes that the average score on final exam is 75. A sample of 20 students' exam scores is as follows: 80, 68, 72, 73, 76, 98, 71, 71, 35, 50, 63, 71, 70, 70, 76, 75, 69, 70, 72, 74 Assuming a normal population, can we conclude that the students' average is still 75? Use alpha = 0.01 a. I

Solve: Measures of Central Tendency and Dispersion

1. How many intervals should there be in a frequency table? 2. What measure of central tendency would be most appropriate for a measurement of salaries if the salaries are normally distributed, why did you choose the measure that you did? 3. What measure of central tendency would be most appropriate for a measurement of salari

Computing Seasonal Effects in Excel

The U.S. Department of Agriculture publishes statistics on the production of various types of food commodities by month. Shown here are the production figures on broccoli for January of a recent year through December of the next year. Using these computed values, determine the seasonal effects (S ? I). Broccoli

BIP Model

Reconsider the California Manufacturing Co. case study (attached). The mayor of San Diego now has contacted the company's president, Armando Ortega, to try to persuade him to build a factory and perhaps a warehouse in that city. With the tax incentives being offered the company, Armando's staff estimates that the net present val

Statistics -Cell Phones and Brain Cancer

In a study of 420,095 cell phone users in Denmark, it was found that 135 developed cancer of the brain or nervous system. If we assume that such cancer is not affected by cell phones, the probability of a person having such a cancer is 0.000340. a. Assuming that cell phones have no effect on cancer, find the mean and standard

Quantitative Research Methods - Need help in formulating a theory about the correlation between measurable independent variables (causes) and one measurable dependent variable (the effect). Be sure to have ... (See attachment for details)

Need help in formulating a theory about the correlation between measurable independent variables (causes) and one measurable dependent variable (the effect). Be sure to have at least two independent variables. 1) Purpose Statement In one paragraph, state the correlation and identify the primary independent variables. State

Empirical rule - 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?

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?

University Seminar Price Problem

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

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 car.

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

Optimal Order Quanity/ ROP

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