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Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section: Chapter Questions

Problem 27SGR

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Question

9

Given the data below are the number of students in each age group.
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15-18
19-22
23-26
27-30
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31-34
35-38
Based on the frequency distribution above, find the relative frequency for the class with lower class limit
15. Give your answer as a percent, rounded to one decimal place.
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Relative Frequency =
Number of
students
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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 to the right. In this table, 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 What is the lower limit of this class? What is the upper limit of this class? What is the class width? What is the midpoint of this class? Round your answer to one decimal place.
A sample of 276 people was surveyed. People are classified according to their political ideology ("left", "right" or "center"). They are also classified according to their opinions regarding a bill ("in favor", "against" or "indifferent"). The results are indicated in the following contingency table. Among right-wing respondents, what is the relative frequency of those who are indifferent to the bill? Round your answer to two decimal places.
The governor of Florida would like to estimate the mean age of all Florida residents. To do so, he randomly selects 500 Florida residents and determines their mean age to be 58.2 years. However, according the most recent census data, the mean age of all Florida residents is 55.6 years. Which of the following properly describes the number 58.2? sample statistic population parameter
A quantitative data set has 22 observations when arranged in descending order what is the value of the median of the data set? when arranged in ascending order what is the value of the 1st quartile, q1, of the data set? when arranged in ascending order what is the value of the 3rd quartile, q3, of the data set?
In order, what are the corresponding terms or pieces of notation for: Population mean, A sample mean, Population standard deviation, s, A set of sample means A sample standard deviation, σ, µ, x̄, Sampling distribution µ, x̄, σ, A sample standard deviation, Sampling distribution Sampling distribution, x̄, µ, A sample standard deviation, σ Sampling distribution, x̄, µ, σ, A sample standard deviation
Suppose that a polling company surveyed 600 people about how much time they spend watching television each day. The results of this survey were compiled and used to create this relative frequency histogram. Assume that all percentages shown in the histogram are whole numbers. Each of the bars in this histogram includes only the left endpoint of the class except for the last bar, which also includes the right endpoint. What percentage of respondents said that they watch television at least six hours per day? How many respondents said that they watch television between three and five hours per day?
Blood pressure values are often reported to the nearest5 mmHg (100, 105, 110, etc.). Suppose the actual bloodpressure values for nine randomly selected individuals are118.6 127.4 138.4 130.0 113.7 122.0 108.3131.5 133.2a. What is the median of the reported blood pressurevalues?b. Suppose the blood pressure of the second individualis 127.6 rather than 127.4 (a small change in a singlevalue). How does this affect the median of thereported values? What does this say about the sensitivityof the median to rounding or grouping in thedata?
Below are the data for the number of days that it took Wyche Accounting to perform audits in the last quarter of last year. 42, 38, 29, 45, 51, 30, 25, 34, 57 What is the mean of the number of days that it took Wyche Accounting to perform audits in the last quarter of last year?
On the first day, the researcher runs 10 elephant shrews, which receive the following scores: 5, 6, 4, 6, 8, 4, 7, 5, 4, 6 Fill in the missing values in the following frequency table.
Among fatal plane crashes that occurred during the past 60 years, 580 were due to pilot error, 52 were due to other human error, 169 were due to weather, 415 were due to mechanical problems, and 430 were due to sabotage. Construct the relative frequency distribution. What is the most serious threat to aviation safety, and can anything be done about it? Complete the relative frequency distribution below. (Round to one decimal place as needed.)

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