26. Birth Weights. The WONDER database, maintained by theCenters for Disease Control and Prevention, provides a single pointof access to a wide variety of reports and numeric public health data.From that database, we obtained the following data for one year'sbirth weights of male babies who weighed under 5000 grams (about11 pounds).Weight (g)Frequency0-under 5002,025500-under 10008,4001000-under 150010,2151500-under 200019,9192000–under 250067,0682500-under 3000274,9133000-under 3500709,1103500-under 4000609,7194000-under 4500191,82631,9424500-under 5000a. Obtain a relative-frequency histogram of these weight data.b. Based on your histogram, do you think that, for the year inquestion, the birth weights of male babies who weighed under5000 grams are approximately normally distributed? Explain youranswer.

Relative Frequency: Relative frequency of a number is defined as the ratio of the actual frequency…

Answered: 26. Birth Weights. The WONDER database,…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Over the past several decades, the United Nations has kept records of the number of births worldwide, categorized by the age of the mother. A frequency table displaying this data for the years 1960 to 1970 is shown. Consider the class consisting of mothers between the ages of 40 and 45 years, who gave birth to an estimated 52,335,000 children worldwide between 1960 and 1970. Age of mother,in years Estimated number of occurrences,in thousands 15 – 20 125,075 20 – 25 312,055 25 – 30 300,458 30 – 35 217,581 35 – 40 131,236 40 – 45 52,335 45 – 50 10,577 Over the past several decades, the United Nations has kept records of the number of births worldwide, categorized by the age of the mother. A frequency table displaying this data for the years 1960 to 1970 is shown. Consider the class consisting of mothers between the ages of 40 and 45 years, who gave birth to an estimated 52,335,000 children worldwide between 1960 and 1970. What is the lower limit of this class?…
Which of the following is the most appropriate type of chart for determining the number of observations at or below a specific value? Select one: a. A histogram. b. A pie chart. c. A time-series chart. d. A cumulative frequency ogive.
5. Suppose a marketing research firm would like to examine if the social networking site that a person primarily uses is influenced by his or her age. In a randomly drawn sample, 369 social network users were asked which site they primarily visited. These data are presented in the following table along with each person's age group. Complete parts a. through c. below. 1 Click the icon to view the data table. a. Using a = 0.025, perform a chi-square test to determine if age group and social networking site used are independent of one another. Identify the null and alternative hypotheses for a chi-square test of independence based on the information in the table. Choose the correct answer below. O A. Ho: Age group and social networking site are independent of one another. H: Age group and social networking site are not independent of one another. O B. Ho: Age group and social networking site are independent of one another. H,: The age group affects the social networking site. OC. Ho: Age…
130 adults with gum disease were asked the number of times per week they used to floss before their diagnoses. The (incomplete) results are shown below: # of times floss per week Frequency Relative Frequency Cumulative Frequency 0 16 0.1231 16 1 21 0.1615 37 2 17 0.1308 54 3 15 4 15 0.1154 84 5 14 0.1077 98 6 16 0.1231 114 7 0.1231 130 a. Complete the table (Use 4 decimal places when applicable) b. What is the cumulative relative frequency for flossing 5 times per week? %
1. What information should be present in a frequency table and why?
16 – 17. Use the following frequency table containing randomly selected people's ages shopping at a local mall to answer questions 16 through 17. IT AGE FREQUENCY 0-4 5-9 10-14 15-19 20-24 25-29 2 4 7 10 12 14 16. What percent (to the nearest whole number) of the shoppers were at most 19 ycars old? а. 20 b. 22 с. 47 а. 53 с. 73 17. What is the shape of this distribution of shopper's ages? a. skewed left b. bimodal c. skewed right d. bell shaped e. Uniform
We asked UST employees to tell us how many megabytes of memory (RAM) they have on their computer. We would like to test to see if the mean amount of memory is the same for three different academic departments. We have the memory amounts for six faculty members' machines in the three departments shown below. Dept. 1 Dept. 2 Dept.3 1 2048 4096 4096 1024 2048 4096 3. 1024 2048 8192 computer 4 2048 4096 8192 1024 2048 4096 2048 8192 2048 Here is the ANOVA table: Source DF Adj SS Adj MS F-Value P-Value Factor x 39263346 19631673 x.xX 0.025 Error xx 61691221 4112748 Total XX 100954567 After ANOVA, assume that we want to do all of the pairwise comparisons between the means in this case. Tukey Pairwise Comparisons: Grouping Information Using the Tukey Method and

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