1. What shape would your distribution histogram be if the variable is approximately normally distributed? 2. True or False. As the amount of confidence increases, the required sample size should decrease. Explain your answer.
The golf scores for the 20 members of a country club were as follows: 81, 76, 107, 95, 119, 92, 83, 74, 108, 88 95, 74, 83, 76, 97, 82, 79, 91, 93, 89 Create a relative frequency histogram using ten-point intervals to show the distribution of the scores.
The solution addresses the tobacco industry case. Tobacco industry representatives have steadfastly maintained that code provisions are still being observed. A 1988 Tobacco Institute publication, "Three Decades of Initiatives by a Responsible Cigarette Industry," refers to the industry code as prohibiting advertising and prom
The heights (in inches) for a sample of 16 male adults are 62, 82, 79, 76, 73, 70, 67, 64, 72,72, 69, 69, 69, 66, 66, 63 Draw the histogram for these data using an initial class boundary of 61.5 , an ending class boundary of 86.5 , and 5 classes.
Describe the difference between a histogram and a dot plot. When might a dot plot be better than a histogram?
A sample of 28 student scores on the chemistry midterm exam is shown. (a) At α = .10, does the population median differ from 50? Make a worksheet in Excel for your calculations. (b) Make a histogram of the data. Would you be justified in using a parametric t test that assumes normality? Explain. 74 60 7 97 62 2 100 5 99
The Webster Mail Order company sells expensive stereos by mail. The following table lists the frequency distribution of the number of orders received per day by this company during the past 100 days. # of orders received per day: 2 3 4 5 6 Number of days: 12 21 34 19 14 a. Construct a probability distribution table for
To evaluate the effectiveness of a treatment, researchers will often measure individuals before and after treatment, and record the amount of difference between the two scores. If the differences average around zero, it is an indication that the treatment has no effect. However, if the differences are consistently positive (or c
2.19 A company executive has read with interest the finding that the average U.S. office worker receives 36 e-mails per day. Assume that an executive, wishing to replicate this study within her own corporation, directs information technology personnel to find out the number of e-mails each of a sample of 100 office workers recei
Ecocommerce.com, a large internet retailer, is studying the lead time (elapsed time between when an order is placed and when it is filled) for a sample of recent orders. The lead times are reported in days. Lead Time (days) Frequency 0 up to 5 6 5 up to 10 7 10 up to 15 12 15 up to 20 8 20 up to
The heights (in inches) for a sample of 15 male adults are 62,82,79,76,73,70,67,64,61,72,72,69,69,69,66 Draw the histogram for these data using an initial class boundary of 60.5 and a class width of 7. Note that you can add or remove classes from the figure. Label each class with its endpoints.
The heights (in inches) for a sample of male adults are 62,82,79,76,73,70,67,64,61,72,72,69,69,69,66 Draw the histogram for these data using an initial class boundary of 60.5 and a class width of 7. Note that you can add or remove classes from the figure. Label each class with its endpoints.
I am trying to figure out how to enter data to create a histogram based on the following info. I want to create the histogram based on the cumulative frequency distribution. Any help is appreciated. Thanks. Pennies by Year: Year # of Coins 1967 3 1968 2 1969 2 1970 1 1971 1 1972 2 1974 1 1975 1 1976 1 1977 3 19
The golf scores for the 20 members of a country club were as follows: 81, 76, 107, 95, 119, 92, 83, 74, 108, 88 95, 74, 83, 76, 97, 82, 79, 91, 93, 89. Create a relative frequency histogram using ten-point intervals to show the distribution of the scores.
I need help in how to display the following data in a histogram. Can you provide step by step advice on how I can go about solving this problem? 1. Display the frequency distribution of the salaries graphically in a histogram (choose intervals to use along the horizontal axis) and tell what is the mean, median and ske
In a relative frequency histogram for a large set of GPAs, the mean and the standard deviation are 2.10 and 0.21 respectively. What proportion of GPAs falls within 1.68 and 2.52? What about the proportion of measurements that are at most 1.89? Discuss how you arrived at these results.
Manufacturing plants A and B produce sports shoes. The following are the data for plant A: 39, 32, 34, 40, 45, 35, 54, 36, 40, 41, 55, 43, 44, 46, 47, 49, 51, 54, 59, 46 The following are the data for Plant B: 27, 37, 29, 44, 31, 33, 34, 46, 58, 59, 32, 32, 55, 57, 63, 33, 56, 58, 62, 51 a) Make a histogram, one above
A civil service exam is given to 200 job applicants. In recent years, grades have followed a normal distribution with mean 66.5 and variance 100. The grades of the job applicants are distributed as follows: Grades Observed Frequency Under 49.5 22 49.5 - 59.5 38 59.5 - 69.5 56 69.5 - 79.
Long-term history has shown that 65% of all elected offices in a rural county have been won by Republican candidates. This year there are 5 offices up for public election in the county. Let r be the number of public offices won by Republicans. a) Find P(r) for r=0,1,2,3,4, and 5. b) Make a histogram for the r probability dis
A nurse measured the blood pressure of each person who visited her clinic. Following is a relative-frequency histogram for the systolic blood pressure readings for those people aged between 25 and 40. Use the histogram to answer the questions below. The blood pressure readings were given to the nearest whole number. 1. Approx
Many regions along the coast in North and South Carolina and Georgia have experienced rapid population growth over the last 10 years. It is expected that the growth will continue over the next 10 years. This has resulted in many of the large grocery store chains building new stores in the region. The Kelley's Super Grocery St
Histogram of Educational Debt. See attached files for full problem description.
1) You may utilize statdisk at www.aw.com/triola in assisting with solution. Click on the text's picture and then on the "Statdisk" button to download the software . Histogram Use the 40BMI indices of women from the data set Fhealth and print a histogram. Instead of using the default values, use a class width of 6.0 and using
34. A recent study of home technologies reported the number of hours of personal computer usage per week for a sample of 60 persons. Excluded from the study were people who worked out of their home and used the computer as a part of their work. (see chart in attached file) a. Organize the data into a frequency distribution
How important is GPA in determining the starting salary of recent business school graduates? Does graduating from a business school increase the starting salary? The Director of Undergraduate Studies at a major university wanted to study these questions. She gathered the following sample information on 15 graduates las
1. Create a real-life research question or topic of your choosing. This question may be something that you work with in your career, see on a daily basis, come from a hobby, etc. The answers to the question (your data) should be quantitative (numerical). Solution: The United States is experiencing high death rate due to
1. Create a real-life research question or topic of your choosing. This question may be something that you work with in your career, see on a daily basis, come from a hobby, etc. The answers to the question (your data) should be quantitative (numerical). 2. Choose a legitimate sampling strategy and collect at least 30 dat
Based on the data in the attach file, can you provide some assistance with a hisograms for both of the sample question and explain the chart for clarification. Thanks.
I have one simple statistics exercise. Please provide explanations. See the attached files.
Question 1 The file ?assignment data.xls? (SEE ATTACHED FILE)contains daily data on water consumption in the cities of Canberra and Queanbeyan from January 1st 2000 to March 25th 2004. (a) Extract the data for the year 2000 when there were no water restrictions and the year 2003 when there were water restrictions. Use the hi