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Descriptive Statistics

Creating histograms and calculating means and variances.

Rent Resident: Amount of monthly profit from residential rent homes There is a data file attached. Rent Commercial: Amount of monthly profit from rent paid on commercial buildings. A realtor owns numerous residential and commercial buildings and collects rent on these properties. The realtor selects 100 months over t

A scientist studying babies born prematurely...

Please see the attached file for full problem description. --- A scientist studying babies born prematurely would like to obtain an estimate for the mean birth weight, , of babies born during the th week of the gestation period. She plans to select a random sample of birth weights of such babies and use the mean of the sam

Four symmetrical distributions

Four symmetrical distributions, labeled (a), (b), (c), and (d), are represented below by their histograms. Without performing any calculations, order the respective standards deviations σ_a, σ_b ,σ_c , and σ_d of the distributions. A X X X X X X X X

Distributions

Four distributions, labeled (a), (b), (c), and (d), are represented below by their histograms. Without performing any calculations, order the respective means , , , and of the distributions. A X X X X X X X X X 1 2

Integer Problem

I need to verify my work and need help with work on Exercises 4, 5, 6, 7 from attached PDF file and Excel file. Please help soon. Please find the attached zip file for all the related files. 4. The Big Bang Novelty Company makes three basic types of noise-makers: Toot, Wheet, and Honk. A Toot can be made in 30 minutes and has

Integer Problem

I need to verify my work and need help with work on Exercises 1, 2, 3 from attached PDF file and Excel file. Please help soon. Please find the attached zip file for all the related files. 1. A manager of a firm's research and development is currently reviewing a set of proposals prepared by her staff. She must soon decide w

Class Width

Using a class number of 8, a highest value of 259, and a lowest value of 125, find the class width.

Word Problem

At the time Beth was hired as a server at a Restaurant, she was told she could average $20 a day in tips. Over the first 35 days she was employed at the restaurant, the mean daily amount of her tips was $24.85 with a standard deviation of $3.24. At the .01 significance level, can Beth conclude that she is earning an average of

Inference for distributions

A). Find the mean IQ scores for girls and for boys. It is common for boys to have somewhat higher scores on standardized tests. It that true? b). Compute 95% T intervals of the Girls' IQ's and the Boys' IQ's and explain what these intervals mean. c). Make a histogram for each set of data to determine whether each distribu

Determining the reorder point and the optimal number

East value Distributors distributes industrial valves and control devices. The Eastern Valve Co. Has an annual demand of 20000 units and cost of $90 per unit. The cost of ordering is $100 per order and inventory-carrying cost is estimated to be 5 percent of the cost of each value. Lead-time is four working days. Determine(a

Under what conditions could trigger strategies be used by these firms to support the collusive level of advertising? Identify the costs that are relevant for your decision, and then determine whether Gear Net should produce 250 hubs or 500 hubs.

15. At a time when demand for ready-to-eat cereal was stagnant, a spokesperson for the cereal maker Kellogg's was quoted as saying, "... for the past several years, our individual company growth has come out of the other fellow's hide." Kellogg's has been producing cereal since 1906 and continues to implement strategies that ma

Integer goal programming model : a. Please describe several economic or "hard" constraints that you would include in your model. b.Please describe several goal or "soft" constraints that you would include in your model. c.Please describe how you would prioritize and/or relative weight the goals you have described in b.

You have now become an expert in the use of goal and integer programming. Consider now how you would creatively apply an integer goal programming model to this problem setting. You are asked here to provide a conceptual or written formulation rather than a mathematical formulation. a. Please describe several economic or "har

Testing for independence

Suppose that a survey of 100 individuals who live in the western region of New York was conducted. The party affiliation (Democrat, Independent, Republican) of each individual surveyed was recorded, as well as their response to the following three questions: Questions of Study 1. Should legislative pay be cut for every day

Statistics problem

The lengths of adult earthworms are normal with mean 8.6cm. and standard deviation 1.6cm. 40 adult earthworms are chosen at random. Approximate the probability that at lease 18 of them are less than 4.5cm.long.

Statistic qustion about adequate sampling

I have an xbar of 1000 and an Sx of 103. I have a random sample of 30. I am trying to figure out if this is an adequate sample without knowing the total population in an office. Can you lead me to a useable equation?