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Quantative Analysis of Data

Find the mean, median, mode, and midrange.

The advertisement for a speed-reading course claimed that the "average" reading speed for people completing the course was 1000 words per minute. Shown below are the actual data for the reading speeds per minute for a sample of 24 people who completed the course. 1000 900 800 1000 900 850 650 1000 1050 800 1000 850 700 750

Empirical Rule

A samples contains 1,000 values. The histogram for this sample is bell-shaped. Approximately 950 values in the sample are known to be within $100 of the mean. Suppose the mean is $5,000. Use Empirical Rule to perform the following: a. calculate a value for the standard deviation. b. determine the data value that is 97.5 percen

Financial analysis

* Calculate the mean, median, range, variance, and standard deviation for revenues, profits, and employees. * Convert the data for each variable to a z-value, and compare BankTen to the average bank for each variable. * Identify the variable that had the greatest relative variation among the b

Probability at a Fast Food Restaurant

A study showed that the average number of hours children in the U.S. watch television each day is 4 hours with a population standard deviation of 1.6 hours. If a group of 64 children is selected at random, what is probability that the average time these children watch television is more than 4.3 hours? Include an appropriate d

Standard Deviation

Using Excel, prepare a frequency distribution from the data you've been collecting. Calculate the Standard Deviation of your data. Is this a normal distribution? What are the implications?

Descriptive Statistics: Passing an Exam

A calculus instructor uses computer aided instruction and allows students to take the midterm exam as many times as needed until a passing grade is obtained. Following is a record of the number of students in a class of 20 who took the test each number of times. Students Number of tests 1

Sampling Distribution of sample mean

A population consists of the four numbers {0, 2, 4, 6}. Consider drawing a random sample of size 2 with replacement. (a) List all possible samples and evaluate for each. (b) Determine the sampling distribution of X. (c) Write down the population distribution and calculate its mean μ and standard deviation σ. (

Means and Standard Deviation

Degrees of Freedom: Ten values have a mean of 75.0. Nine of the values are 62,78,90,87,56,92,70,70, and 93. a. Find the 10th value. b. We need to create a list of n values that have a specific known mean. We are free to select any values we desire for some of the n values. How many of the n values can be freely assigne

Measurement Scales

For the following measurement scales, indicate the measures of central tendency that are appropriate. a. nominal scale b. ordinal scale c. interval scale d. ratio scale

Standard Deviation & Regression Equation

An instructor wants to figure out if a student's score on the first exam is correlated with their score on the final exam or if they predict the final exam. Below are the figures for 10 randomly selected students from her class. (25 points) Student First Exam, Final Exam,

Quantitative Methods

The Willow Furniture Company produces tables. The fixed monthly cost of production is $8,000, and the variable cost per table is $65. The tables sell for $180 a piece. For a monthly volume of 300 tables, determine the total cost, total revenue, and profit. Determine the monthly break-even volume for the Willow Furniture

Standard Deviation & Bell-Shaped Curve

What does the standard deviation unit really represent? Is the distinction among various parts of the bell-shaped curve arbitrary or is there certain logical and rational principle involved that creates such distinctive demarcations shown in a chart like this?

Sample Mean and Confidence Intervals

Find the confidence interval at 95%, than at 99%, using the sample mean of the following problem. From a sample of 30 responses on a 7 point scale, measuring whether an extremist hate group should be given a permit to demonstrate ( 1 = strongly oppose though 7 = strongly favor). 3 5 1 4 3 3 6 6 2 3 3 1 1 2 2

How to Measure the Data That I Collected

1) Can you explain to me what categories and types of data I collected? 2) Would a frequency distribution table be appropriate for displaying my data? Please explain yes or no to help me understand. 3) Please show me how to create and submit an illustrative frequency table to show how such a table might look

Descriptive statistics and charts..

Part 1: (20 Points) Moore Travel Agency, a nationwide travel agency, offers special rates on certain Caribbean cruises to senior citizens. The president of Moore Travel wants additional information on the ages of those people taking cruises. A random sample of 70 customers taking a cruise last year revealed these ages. 57 77

Calculation of descriptive statistics and histogram in Excel.

Using the Excel program, enter the data below onto a worksheet. Then touch the Paste Function button on the toolbar. You'll get a menu. On the left side of the menu, select "Statistical." This will make the right side show all the statistical tests you can do with EXCEL. Pick "average" and it will calculate the mean, pick "stand

Pricing and Sales Volumes

The following uses the files EXAM.XLS and Developing_Country_Pricing.PDF. In this simulation, you are about start selling a new product, an MP3 player (YourPlayer). Management has provided you with a proforma income statement to help assess the viability of the product. They need your help to complete the income statement.

Mean, Median and Mode

The final grades for a random sample of MKT 380 students are as follows: Students Final Grades Student A 70 Student B 85 Student C 90 Student D 93 Student E 97 Student F 80 Student G 85 Student H 88 a. What is the mean for these data? b. What is the mode for these data? c. What is the

Quantitative analysis questions about research article.

Answer the following questions for the attached research article (Dormire, S.L. & Reame, N.K. 2003. Menopausal hot flash frequency changes in response to experimental manipulation of blood glucose. Nursing Research 52(5): 338-343.): 1. Problem What is the problem the study was conducted to resolve? Why is the problem an i

Probability Distributions - Scores

1. The scores for an IQ test are normally distributed with a mean of 100 and a standard deviation of 15. If a person is selected at random, what is the probability that his IQ score will fall below 105 and will it be between 90 and 110. 2. An advertising company plans to market a product for low income families. A study state

Construct the 90 percent confidence interval

A. Construct the 90 percent confidence interval for occupational prestige for respondents with only a high school diploma (N = 1,412). b. Construct the 90 percent confidence interval for occupational prestige for respondents with a bachelor's degree (N = 437). State in words the meaning of the result. c. Use these statistics

Statistical Calculations of Standard Deviation, Mean and Variance

16. The heights (in inches) of 10 adult males are listed below. Find the population standard deviation (o). 70 72 71 70 69 73 69 68 70 71 a. 70 b. 3 c. 2.38 d. 1.42 17. The heights (in inches) of 10 adult males are listed below. Find the population variance (o2). 70 72 71 70 69 73 69 68 70 71 a. 2.35 b. 2.75

Descriptive Statistics

Use the given data to find each of the listed values 56 69 64 68 79 56 73 53 62 (a) Mean (b) Median (c) Mode (d) Midrange (e) P 80 (f) Standard Deviation (g) Variance Which is better: A score of 73 on a test with a mean of 75 and a standard deviation of 5 OR a score of 80 on a test

Quantitative methods interest in linear programming practice problems

Consider the following integer linear programming problem. Max Z = 3x1 + 2x2 Subject to: 3x1 + 5x2 <= 30 4x1 + 2x2 <= 28 x1 <= 8 x1, x2 >= 0 and integer The solution to the linear programming relaxation is: x1 = 5.714, x2= 2.571. What is the optimal solution to the integer linear programming problem? State the v

Statistics Questions

1. Explain the general purpose for measuring central tendency? 2. Explain what is meant by each of the following statements: a. The mean is the balance point of the distribution. b. The median is the midpoint of the distribution. 3. Identify the circumstances in which the median rather than the mean is the preferred mea

Measure of central tendency

Provide a brief description of a real-world example in which one measure of central tendency provides useful information while another measure of central tendency provides meaningless (or even misleading) information.

Statistical Quality Control

Statistical Quality Control. See attached file for full problem description. (1) Twenty five items were selected at random a production process and their quality characteristic was measured resulting in the following data: i x i x 1 97.00 16 78.82 2 87.22 17 94.32 3 102.44 18 95.96 4 112.76 19 101.35 5 111.98 20