This archive file of BUS 308 Week 2 Quiz shows the solutions to the following problems: 1. Question : In a statistical study‚ the random variable X = 1‚ if the house is colonial‚ and X = 0 if the house is not colonial‚ then it can be stated that the random variable is continuous. True False 2. Question : The set of all possible experimental outcomes is called a(n) sample space. event. experiment. probability. 3. Question : If two events are independent‚ then the probability of their
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mathematical model that defines a functional relationship between various input variables (or independent variables) and one or more bottom-line performance measures (or dependent variables). The following equation expresses this relationship: Y = f(X1‚ X2‚ ...‚ Xk) In many spreadsheets‚ the values of various input cells are determined by the person using the spreadsheet. These input cells correspond to the independent variables X1‚ X2‚ ...‚ Xk in the previous equation. Various formulas (represented
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Section B Attempt Any Six Questions (6*5= 30) 1. Company A’s costs are mostly variable‚ whereas Company B’s costs are mostly fixed. When sales increase‚ which company will tend to realize the greatest increase in profits? Explain. 2. Crystal Telecom has budgeted the sales of its innovative mobile phone over the next four months as follows: Sales in Units July. . . . . . . . . . . . . . 30‚000 August . . . . . . . . . . . 45‚000 September . . . . . . . . 60‚000 October . . . .
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2. A continuous random variable may assume only integer values within a given interval. 3. An inspector correctly identifies defective products 90% of the time. For the next 10 products‚ the probability that he makes fewer than 2 incorrect inspections is 0.736. 4. A decision tree is a diagram consisting of circles decision nodes‚ square probability nodes‚ and branches. 5. Excel can only be used to simulate systems that can be represented by continuous random variables. 6. Starting
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3 What are some similarities and differences between skimming pricing‚ prestige pricing‚ and above-market pricing? 4 Touché Toiletries Inc. has developed an addition to its Lizardman Cologne line tentatively branded Ode d’Toade Cologne. Unit variable costs are 45 cents for a 3-ounce bottle‚ and heavy advertising expenditures in the first year would result in total fixed costs of $900‚000. Ode d’Toade Cologne is priced at $7.50 for a 3-ounce bottle. How many bottles of Ode d’Toade must be sold
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Definitions Random Variables A random variable represents a possible numerical value from an uncertain event. Discrete random variables produce outcomes that come from a counting process (e.g. number of courses you are taking this semester). Continuous random variables produce outcomes that come from a measurement (e.g. your annual salary‚ or your weight). 5-3 Definitions Random Variables Random Variables Ch. 5 Discrete Random Variable Continuous Random Variable Ch. 6 5-4 Discrete Random Variables
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continuous probability distributions (stattrek.com). A random variable is represented by “x” and it is the result of the discrete or continuous probability. A discrete probability is a random variable that can either be a finite or infinite of countable numbers. For example‚ the number of people who are online at the same time taking a statistics class at CTU on a given day is a discrete random probability. Another example of a discrete random probability is the number of people who stand in a checkout
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Decision Variables O.F. – Objective Funtion S.T. or CONST - Constraints Constrained Mathematical Model – a model with an objective and one or more constraints EXAMPLE: 50D + 30C + 6M is the total profit for a production run($50 profit for Desk‚ $30 profit for Chair and $6 per pound for steel) Functional Constraints - ≤ ≥ or = --Restrictions that involve expressions with 1 or more variables EXAMPLE: 7d+3c+1.5M <= 2000 (constraint on raw steel) Variable Constraints – Involve only 1 variable – Nonnegativity
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the costs for the year. The restaurant wanted to see what some of their fixed and variable costs were for the year. They also wanted to make sure they remain in their relevant range. The costs focused on were the cost of hamburgers (raw materials) and the cost of building rent. It was determined that the raw materials were the variable costs because the cost will vary based on production of hamburgers. A variable cost is a cost that will change in direct proportion to changes in the cost-driver
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Summary Chapter 1-7 Chapter 1 * Population – consists of members of a group which you want to draw a conclusion * Sample – portion of population * Parameter – numerical measure that describes a characteristic of a population * Statistic – numerical measure that describes a characteristic of a sample * Descriptive statistics – collecting‚ summarizing and presenting data e.g. survey * Inferential statistics – drawing conclusions about a population based on sample data
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