Excursions In Modern Mathematics, 9th Edition
9th Edition
ISBN: 9780134494142
Author: Tannenbaum
Publisher: PEARSON
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Question
Chapter 14, Problem 60E
To determine
a.
To find:
The total number of students at the university those were not familiar with the new financial aid program.
To determine
b.
To explain:
The results of the survey are reliable or not.
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c) State which sampling method used in the following scenarios
i. Select the first 19 customers who enter building.
ii. Select 40 students in each distriet in proportion of how many students are in each
district
iii. Randomly select 30 customers by assigning each customer a number, then selecting
customers based on which number appears in a random numbers table.
iv. Take note of every fifth car passing over a bridge.
According to the 2016 Consumer Expenditure Survey, Americans spend an average of $1,124 on cellular phone service annually (U.S. Bureau of Labor Statistics website). Suppose that we wish to determine if there are differences in cellular phone expenditures by age
group. Therefore, samples of 10 consumers were selected for three age groups (1834, 35- 44, 45 and older). The annual expenditure for each person in the sample is provided in the table below.
Click on the datafile logo to reference the data.
DATA file
35-44
969
434
1,792
1,500
1,277
1,056
1,922
1,350
18 - 34
1,355
115
1,456
2,045
1,621
994
1,937
1,200
1,567
1,390
a. Compute the mean, variance, and standard deviation for each of these three samples. Round your answers to one decimal place.
18-34
35-44
45+
1,586
1,415
45 and Older
1,135
956
400
1,374
1,244
825
763
1,192
1,305
1,510
Mean
=
Variance
Standard Deviation
b. What observations can be made based on these data?
The age group that spends the least amount on cellular phone…
The department head of a private secondary school in Marikina City surveyed randomly selected students from each grade level to know their readiness in limited face-to-face classes.
a. Simple Random Sampling
b. Systematic Sampling
c. Stratified Sampling
d. Cluster Sampling
Chapter 14 Solutions
Excursions In Modern Mathematics, 9th Edition
Ch. 14 - As part of a sixth-grade class project the teacher...Ch. 14 - As part of a sixth-grade class project the teacher...Ch. 14 - Madison County has a population of 34,522 people....Ch. 14 - Madison County has a population of 34,522 people....Ch. 14 - A big concert was held at the Bowl. Men and women...Ch. 14 - A large jar contains an unknown number of red...Ch. 14 - You want to estimate how many fish there are in a...Ch. 14 - To estimate the population in a rookery, 4965 fur...Ch. 14 - To count whale populations, the capture is done by...Ch. 14 - The critically endangered Mauis dolphin is...
Ch. 14 - Exercises 11 and 12 refer to Chapmans correction....Ch. 14 - Exercises 11 and 12 refer to Chapmans correction....Ch. 14 - Starting in 2004, a study to determine the number...Ch. 14 - Exercises 25 through 28 refer to the following...Ch. 14 - Name the sampling method that best describes each...Ch. 14 - An audit is performed on last years 15, 000...Ch. 14 - Exercise17 through 20 refer to the following...Ch. 14 - Exercise17 through 20 refer to the following...Ch. 14 - Exercise17 through 20 refer to the following...Ch. 14 - Exercise17 through 20 refer to the following...Ch. 14 - Prob. 21ECh. 14 - Prob. 22ECh. 14 - Prob. 23ECh. 14 - Prob. 24ECh. 14 - Exercises 25 through 28 refer to the following...Ch. 14 - Exercises 25 through 28 refer to the following...Ch. 14 - Exercises 25 through 28 refer to the following...Ch. 14 - Exercises 29 and 30 refer to the following story:...Ch. 14 - Exercises 29 and 30 refer to the following story:...Ch. 14 - Prob. 31ECh. 14 - Prob. 32ECh. 14 - Exercises 33 through 36 refer to the following...Ch. 14 - Exercises 33 through 36 refer to the following...Ch. 14 - Exercises 33 through 36 refer to the following...Ch. 14 - Exercises 33 through 36 refer to the following...Ch. 14 - Exercises 37 through 40 refer to a clinical study...Ch. 14 - Exercises 37 through 40 refer to a clinical study...Ch. 14 - Exercises 37 through 40 refer to a clinical study...Ch. 14 - Prob. 40ECh. 14 - Prob. 41ECh. 14 - Exercises 41 through 44 refer to a clinical trial...Ch. 14 - Prob. 43ECh. 14 - Exercises 41 through 44 refer to a clinical trial...Ch. 14 - Prob. 45ECh. 14 - Prob. 46ECh. 14 - Exercises 45 through 48 refer to a study on the...Ch. 14 - Prob. 48ECh. 14 - Exercises 49 through 52 refer to a landmark study...Ch. 14 - Prob. 50ECh. 14 - Exercises 49 through 52 refer to a landmark study...Ch. 14 - Prob. 52ECh. 14 - Exercises 53 through 56 refer to a study conducted...Ch. 14 - Prob. 54ECh. 14 - Exercises53_ through 56_ refer to a study...Ch. 14 - Exercises53 through 56 refer to a study conducted...Ch. 14 - Prob. 57ECh. 14 - Prob. 58ECh. 14 - Exercises 57 through 60 refer to the following...Ch. 14 - Prob. 60ECh. 14 - Prob. 61ECh. 14 - Prob. 62ECh. 14 - Prob. 63ECh. 14 - Prob. 64ECh. 14 - Read the examples of informal surveys given in...Ch. 14 - Leading-question bias. The way the questions in...Ch. 14 - Prob. 67ECh. 14 - Prob. 68ECh. 14 - Prob. 69ECh. 14 - Prob. 70ECh. 14 - Prob. 71ECh. 14 - Prob. 72ECh. 14 - One of the problems with the capture-recapture...Ch. 14 - Darrochs method. is a method for estimating the...
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- A researcher divided subjects into two groups according to gender and then selected a fixed proportion of members from each group for his sample. What sampling method was the researcher using? A. Stratified sample. B. Simple random sample. C. Voluntary response sample. D. Cluster sample.arrow_forwardc) State which sampling method used in the following scenarios i. Select the first 19 customers who enter building. 11. Select 40 students in each district in proportion of how many students are in each district iii. Randomly select 30 customers by assigning each customer a number, then selecting customers based on which number appears in a random numbers table. iv. Take note of every fifth car passing over a bridge.arrow_forwardA graduating education student is interested to know the engagement of senior high school students in their mathematics class. In doing so, he randomly selected 8 public senior high schools in Marikina City and surveyed 100 students from each school. a. Simple Random Sampling b. Systematic Sampling c. Stratified Sampling d. Cluster Samplingarrow_forward
- Mrs. Trahan samples her class by picking 10 numbers from her hat and each number is assigned to a student. This is random sampling. Select one: a. simple b. cluster C. systematic d. stratifiedarrow_forwardSee attached table for the questions below: Thank you! a) Identify the population for this investigation.b) Identify the sample for this investigation. c) Identify the sampling method that was used to select the sample. Give one advantage and one disadvantage of using this sampling method. d) For each of the following charts: stem-and-leaf diagram, box-and-whisker diagram, bar chart and histogram, indicate whether or not the chart would be suitable for presenting the data displayed in Table 1 above. Give reason for your answer. e) Use Table 1 to calculate:i.the mean employees’ morale. ii.the median iii.The modearrow_forwardA researcher wishes to conduct an English newspaper readership survey based on race in a town with a population of 100,000 people. The population breakdown is as follows: 50 % Chinese, 30% Malay, 18% Indian and 2% others, State the population for this survey. State the possible sampling frame for this survey. Suggest a sampling method that is appropriate for this survey. State one advantage of the sampling method used. State the method of data collection for the above survey. Give two reasons why this method is suitable in this situation. Suppose the researcher is unable to locate a sampling frame for this survey, suggest an appropriate sampling method for the researcher. Briefly describe the sampling method suggested.arrow_forward
- A surveyor decides to sample a number of households in a community for a needs assessment project. Suppose he does a sample size calculation and determines that he only needs to sample 15 out of 100 households. What is the sampling fraction?arrow_forwardA geography student in Parkville, Missouri is conducting a housing survey, including questions about a proposed rent control initiative. She knows that about 38% of the people in Parkville live in apartments, and wants about 38% of the surveys given to apartment dwellers. What kind of sampling should she use?arrow_forwardIf you were conducting a survey to find out how many of your fellow students approved of the state providing free community college tuition, what method of sampling would you use and why?arrow_forward
- 1. Determine the sampling procedure to be used and explain why. Determine the population under consideration and the sampling unit. The Undersecretary of the Department of Agriculture is interested in the employee’s opinion on his administrative policies. Sampling procedure used: ?? Explanation: ?? Determine the population: ?? Determine the sampling unit: ??arrow_forwardA manufacturer would like to survey users to determine the demand potential for a new power press. The new press has a capacity of 500 tons and costs $225,000. It is used for forming products from lightweight and heavyweight steel and can be used by automobile, construction equipment, and major appliance manufacturers. a. Identify the population and sampling frame that could be used. b. Describe how a simple random sample can be drawn using the identified sampling frame. c. Could a stratified sample be used? If so, how? d. Could a cluster sample be used? If so, how? e. Which sampling technique would you recommend? Why?arrow_forwardIf you were a researcher and wanted to conduct a research within your Barangay, what would it be? What sampling technique are you going to use?arrow_forward
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