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Quantative Analysis of Data

Calculating mean, critical t-value, sample size

1. A local bank needed information concerning the checking account balances of its customers. A random sample of 15 accounts was checked. The mean balance was $686.75 with a standard deviation of $256.20. Find a 98% confidence interval for the true mean. Assume that the account balances are normally distributed. 2. Find t

This problems is about Mean, Median, Mode, Range, and Standard Deviation

Using the following data points (6, 6, 8, 12, 11, 9, 6, 7, 8, 10), create a situational context for the data (for example: the data points represents the number of miles I jogged during my last 10 workouts or the number of applicants that successfully passed the call center simulation to get a face-to-face interview, from Feb 1

Unbiased Estimator of Teta

Let X1, X2, X3......Xn represent a random sample from the Rayleigh distribution with destiny function given exercise 15. Determine: a) The maximum likelihood estimator of theta and then calculate the estimate the vibratory stress data gven in the exercise. Is this estimator the same as the unbiased estimator suggested in Ex

Inferences and Assumptions

An experiment was conducted to compare the effects of two teaching styles for grade 12 mathematics. The individuals in experiment were grade 12 math students from one particular high school. The students were randomly assigned of the two treatment groups. After 3 week course all students took an identical standardized exam. The

Median and Percentile

Kevin Horn is the national sales manager for National Textbooks, Inc. He has a sales staff of 40 who visit college professors all over the United States. Each Saturday morning he requires his sales staff to send him a report. This report includes, among other things, the number of professors visited during the previous week. Lis

Rate of Return Problem

18.) Portfolio Analysis. Use the data in the previous problem and consider a portfolio with weights of .60 in stocks and .40 in bonds. a.) What is the rate of return on the portfolio in each scenario? b.) What is the expected rate of return and standard deviation of the portfolio? c.) Would you prefer to invest in the por

RHI Management Resources

RHI Management resources conducted a survey of 1400 chief financial officers. When asked how much an impact interest rates have on the purchasing decisions they make for their company, 672 reported that they have little or no impact, 700 financial officers stated that interest rates have a significant impact or somewhat signifi

Job Satisfaction of Employees

The data set for our course is available via the following link DataSet and contains the following eight sections of data that will be used throughout our course: (1) Gender (2) Age (3) Department (4) Position (5) Tenure (6) Overall Job Satisfaction (7) Intrinsic Job Satisfaction - Satisfaction with the actual performance of

Statistics of Weekly Overtime Hours

The weekly overtime hours worked by all the employees at the Publix Market are: 1, 4, 6, 12, 5, and 2. a. Is this a sample or a population? b. What is the mean number of overtime hours worked? c. What is the median? Interpret. d. What is the mode? e. What is the mean deviation? f. What is the standard deviation? g. What i

Confidence levels for Bradford Electric Illuminating Company

(See attached file for full problem description) --- The Bradford Electric Illuminating Company is studying the relationship between kilowatthours (thousands) used and the number of rooms in a private single-family residence. A random sample of 10 homes yielded the following. Number of Kil

Scientific Instrument Company

1. The precision Scientific Instrument Company manufactures thermometers that are supposed to give reading of 0 Celsius at the freezing point of water. The tests on a large sample of theses thermometers reveal that at the freezing point of water, some give reading below 0 Celsius. Assume that the mean reading in 0 Celsius and th

Standard deviation

There are three values: 2.15*10^-18, 1.97*10^-18, 2.48*10^-18. Average value is 2.20*10^-18 Find the standard deviation to correct number of significant figures. Standard deviation should be reported to same power as the average value.

SPSS and Numeric Codes

Enter the following dataset into SPSS. Create numeric codes for the nominal variables, then use "values" to show the meaning of the numbers: ID Age Jog_YN Weight Take_Vit 1 20 N 180 Y 2 30 N 150 N 3 33 N 175 N 4 40 N 163 N 5 41 N 190

Distributions & quantitative analysis

I need verified on the following questions. Please identify the correct answers. The primary purpose of quantitative analysis should be to gain a greater understanding of the problem, not to automate decision making. True False Managers do not need to be familiar with the limitations, assumptions, and

New York Yankees Salary Analysis

I need some help with calculations in these three questions: A. Determine the mean, median, and the standard deviation. b. Determine the coefficient of skewness using Pearson's method c. Determine the coefficient of skewness using the software method. Listed below are the salaries for the New York Yankees for the year

A step by step example of how to figure standard deviation using numbers.

I have lots of data -21 people with various info on each- I need to compare data for each via gender, age, etc.. but my problem is that I need to do this by using standarad deviations- I have tried numerous sites to figure how to do this- But every site uses charts- I need an example that is similar to my problem-using #'s not c


2.A group of 25 subjects have their diastolic blood pressures measured. The results, in SPSS are: |-----------|-------|--------| |N |Valid |25 | |-------|--------| | |Missing|0 | |-----------|-------|--------| |Median |85.00 | |-------------------|--------| |Mode |82.00 | |--

Summary statistics-mean, median, mode, first quartile, third quartile, range, interquartile range, 90th percentile, shape of the distribution, skewness, sample variance and sample standard deviation, coefficient of variation, grouped data

2. (no explanation required) suppose we have a set of sample data. For each quantity listed below, could the quantity be negative? (For each quantity, answer Yes or No.) Quantity Possibly Negative? (Yes or No) Arithmetic Mean Standard Deviation Frequency Median Mode Range First Quartile Interquartile Range

Statistics questions - normal and continuous

1. What are the characteristics of a normal distribution? 2. List some examples of continuous data. 3. What is the name of the distribution that measures the number of occurrences of an event during specified intervals? 4. What would be the characteristics of a binomial distribution? 5. A population consists of t

Q 42 - Refer to the baeball 2000 data attachment...

Refer to the baseball 2000 data attachment. a. At the .10 significance level, is ther a difference in the variation of the number of stolen bases among the teams that play their home games on natural grass versus artificial turf? b. Create a variable that classifies a team's total attendance into three groups: less than 2.

Descriptive Statistics

How do I prepare 4 -7 power point slides using the descriptive statstics that I currently have? (See attached file for full problem description) --- Descriptive Statistics There are several measures of central tendencies that can be applied to the data that was collected for the Small Business Owners Day Care Meal Bu

Making Inferences Based on a Single Sample

I. Explain what the phrase 95% confident means when we interpret a 95% confidence interval for mu. a. In repeated sampling, 95% of similarly constructed intervals would contain the value of the population mean. b. 95% of similarly constructed intervals would contain the value of the sampled mean. c. 95% of the observations in

Inferences Based on Two Samples

A new weight-reducing technique, consisting of a liquid protein diet, is currently undergoing tests by the Food and Drug Administration (FDA) before its introduction into the market. A typical test performed by the FDA is the following: The weights of a random sample of five people are recorded before they are introduced to the

Solve the problem and show solution

Solve the problem and show solution You are given the following population data of the highest IQ's at Really Bright University. 145 168 163 162 185 164 156 194 168 152 168 146 157 173 156 174 136 134 140 171 207 172 153 169 154 Determine the following: 1. Median 2.

Probability, Mean, Standard Deviation

When a female who is a carrier of color-blindness and a male who does not carry color blindness parent a child, the probability is 0.25 that a child born will be a color-blind male. Assume one such couple will have 6 children. Let X = the number of color-blind males parented by this couple. a. Find the probability that this

Solving Continuous Probability Distributions

Refer to the attachment... a. Develop a 90 percent confidence interval for the mean percent of the population over 65 years. b. Develop a 90 percent confidence interval for the mean energy use.

Statistics Problem

An air traffic control error is said to occur when planes come too close to one another. The following data represent the number of air traffic control errors for a random sample of regions around the US for fiscal years 1996 and 2000. a. Compute the sample mean number of errors in 1996 and 2000 b. Compute the median numb

Statistics theory problems

Please find the questions in the attached document. 1. To get through a page in a statistics book can take three or four times longer than to get through a page in a nonnumerical book. True-False Basic math problems: 2. -12 + 8 = 3. 4 * (-5) = 4. -5 / -4 = 5. 3 * 7 - 6 = 6. 4^3 = 7. ((8 + 3) * 2) - 5 =