From a practical point of view, what is the difference between a frequency distribution and a relative frequency distribution? Why is a cumulative relative frequency distribution so much more informative that just the relative frequency distribution? Use examples to describe these differences.
Use the frequency distribution, which shows the response of a survey of college students when asked, "How often do you wear a seat belt when riding in a car driven by someone else?" Find the following probabilities of responses of college students from the survey chosen at random. RESPONSE FREQUENCY Never
Identify the class width, class midpoints and class boundaries for the given frequency distributions. Daily Low Temp Frequency Daily Low Temp Frequency 50-52 1 62-64 7 53-55 3 65-67 7 56-58 5
A manufacturing company produces electric insulators. If the insulators break when in use, a short circuit will likely occur. To test the strength of the insulators, destructive testing in high powered labs is carried out to determine how much force is required to break the insulators. Force is measured by observing how much
You are the production manager for an operation that produces circuit boards. Each board is tested at the end of the manufacturing process. Rejected boards are discarded and have no future value. For product B-17, you have kept data on the number of rejects for the past 38 weeks. These data are: Number of rejected boards.
Attached is a small data set. This is information that comes from a Mfg line at which I am an intern. I have calculated the mean, std dev, min, and max for the 2 data sets. but I do not understand statistics well enough or the "Data Analysis" add-in in Excel. I am being asked to put the 2 sets of data into "normal distribu
See the attached file. In exercises 5 to 6, it identifies the width of class, the mid-values of class and the borders of the class for the given frequency allocations. 5) Daily minimal temperature (F) Frequency 35-40 1 40-44
The data in the file protein.xls indicate fat and cholesterol information concerning popular protein foods (fresh red meats, poultry, and fish). For the data relating to the number of calories and the amount of cholestrol for the popular protein foods: a. Consruct a frequency distribution and a percentage distribution.
Your customers have been divided into 3 groups. The first group represents 15% of customers, and these customers spent an average of $29.76 last year. The second group represents 29% of customers who spent $58.03 on average. Within the third group, average spending was $75.10. You are interested in finding the average spendi
Frequency distribution a) Use the probability distribution to find the mean of the probability distribution. b) Use the probability distribution to find the variance of the probability distribution. c) Use the probability distribution to find the standard deviation of the probability distribution. d) Use the probability distribution to find the expected value of the probability distribution.
5. A frequency distribution is shown below. Complete parts (a) through (e). The number of dogs per household in a small town Dogs 0 1 2 3 4 5 Households 1261 438 169 46 27 11 (a) Use the frequency distribution to construct a probability distribution. (b) Find the mean of the probability distribution. (c) Find the variance
1. A pharmaceutical company conducted a study to evaluate the effectiveness and safety of a new inhaled form of insulin for the treatment of diabetes. A group of 650 diabetics was given the drug twice a day, while another group of 650 diabetics was given an inhaled placebo twice a day. Insulin levels were checked periodically
For following set of scores, prepare a frequency distribution, a histogram, and a stem-and-leaf display for each variable. Also calculate the mean, the median and the standard deviation of each score. Are there any outliers in the distribution? If so,what is the result if these scores are removed fro the data set? Draw a scat
I have attached several problems that I need solved. Questions - u4 The questions are to be answered with full solutions. Be sure to focus on proper mathematical form, including: 1. One equal sign per line, 2. Equal signs in each question lined up vertically with each other, 3. No self-developed short form notations.
Temperature Frequency 96.5 - 96.8 1 96.9 - 97.2 8 97.3 - 97.6 14 97.7 - 98.0 22 98.1 - 98.4 19 98.5 - 98.8 32 98.9 - 99.2 6 99.3 - 99.6 4 Find the mean, standard deviation, and variance for this frequency distribution.
See the attached file. Sales Price (Thousands) Frequency Percent Frequency Cumulative Frequency Cumulative Percent Frequency 20 - 39 1 40 - 59 2 60 - 79 4 80 - 99 2 100 - 119 1 Sales records for a real estate company for the month of May show the fo
The following frequency distribution reports electricity cost for a sample of 50 two-bedroom apartments in Albuquerque, New Mexico during the month of May last year. Electricity Cost Frequency $ 80 up to $100 3 100 up to 120 8 120 up to 140
The following frequency distribution reports the number of frequent flier miles, reported in thousands, for employees of Brumley Statistical Consulting, Inc. during the first quarter of 2004. Frequent Flier Miles Number of Employees 0 up to 3 5 3 up to 6 12 6 up to 9
Q2) The owner of a small business wants to analyze profits over the past 30 years. Profits (in thousands of dollars) were obtained for the 30-year period. The ranked data values are: 15 17 18 19 20 20 20 21 23 23 24 24 24 24 24 25 25 25 25 25 26 26 27 27 28 29 30 30 31 32 a. Complete the following grouped frequency d
A podiatrist recorded the recovery times, measured in days, for 36 patients. He was trying out a new procedure and hoped that the recovery time would be less than the usual 6 days. The recorded time were: 8 7 6 9 4 5 3 7 8 10 7 7 6 4 10 3 6 8 2 5 4 5 3 8 7 4 6 3 7 12 4 3 6 6 9 4 a) Construct the frequency distribution
The largest value in a set of data is 160, and the smallest value is 70. If the resulting frequency distribution is to have six classes of equal width, what will be the class interval? The options are 15, 6, 12, and 5.
You are the production manager for an operation that produces circuit boards. Each board is tested at the end of the manufacturing process. Rejected boards are discarded and have no future value. For product B-17, you have kept data on the number of rejects for the past 41 weeks. These data are found in this Excel spreadsheet.
Consider the following frequency table of the performance ratings on a scale of 1-good, 2-fair, and 3-poor, bestowed on their local baseball team by a collection of 100 fans: Rating Frequency 1 20 2 30 3 50 The cumulative relative frequencies for each performance rating are a. 1-20%, 2-30%, 3-50%
The shortest player in a random sample of 50 male NBA basketball players measured in at 67 inches in height. The tallest player's height was 88 inches. The frequency table that you are constructing in order to display the results of this study should contain _____________ height classes, and the size of each class should be ____
Don Larch, the manager of a popular local barbershop, has decided to evaluate the time required by his customers to obtain a haircut, pay, and depart. Doug borrowed the clock punch from one of the offices in the shopping center and asked the next 36 customers to punch in when they arrived at his shop and punch out after paying f
1. A sample of 2,000 licensed drivers revealed the following number of speeding violations. Number of Violations Number of Drivers 0 1,910 1 46 2 18 3 12 4 9 5 or more 5 Total 2,000 1. What is the experiment? 2. List one possible event. 3. What is the probability that a particular driver had
For commercial banks in each state, the U.S Federal Deposit Insurance Corporation has listed their total deposits (billions of dollars) as follows. Deposits Deposits Deposits AL 62.6 LA 55.2 OH 200.2 AK 6.0 ME 16.7 OK 46.3 AZ 61.8 MD 82.1 OR 3
See attachment. Please show steps/work for problems. 1. During the last 10 years marketing executives believed that the same proportion of adult men and adult women watched TV news programs. The marketing executives would like to perform a statistical test to assure themselves that a greater proportion of women now watch TV
A sample of people is selected. The people sampled are classified according to their place of residence and the highest educational degree that they have earned. The results are given in the contingency table below. Highest Degree Warned No Degree 2 yr degree 4 yr degree Advanced degree Urban 29 30 29 15 Places
DATA: - Height of arch, feet, 3-9, 10-29, 30-49, 50-74, 75-higher - Number of arches 111 96 30 33 18 in park QUESTION: For an arch chosen at random in Ahches National Park, use the preceding information to estimate the probability that the height of the arch opening is: a) 3 to 9 ft
Statistics Concepts - 15. A doctor's office staff studied the waiting times for patients who arrive at the office with a request for emergency service. The following data with waiting times in minutes were collected over a one month period. ... [Please the attached questions file.]
11. Consider the following data. 14 21 23 21 16 19 22 25 16 16 24 24 25 19 16 19 18 19 21 12