/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Problem 13 You are interested in the weight... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 1: Problem 13

You are interested in the weights of backpacks students carry to class and decide to conduct a study using the backpacks carried by 30 students. (a) Give some instructions for weighing the backpacks. Include unit of measure, accuracy of measure, and type of scale. (b) Do you think each student asked will allow you to weigh his or her backpack? (c) Do you think telling students ahead of time that you are going to weigh their backpacks will make a difference in the weights?

Short Answer

Expert verified
Use a digital scale with at least 0.1 kg accuracy; not all students may agree to weigh; prior notification could alter backpack contents.

Step by step solution

01

Establish Measuring Guidelines

First, choose a suitable unit of measure such as kilograms (kg) or pounds (lb) for consistency. Use a reliable digital scale capable of measuring with an accuracy of at least 0.1 kg or 0.1 lb to ensure precise weights. Position the scale on a flat, stable surface before use. Ask each student to gently place their backpack on the scale to get the measurement, taking care not to touch it during the process, and then record the weight.
02

Consider Willingness of Participants

While most students will likely allow their backpacks to be weighed for a study, consider that some may have privacy concerns or personal reasons for declining. Be prepared to address concerns courteously by explaining the purpose of the study and assuring them that individual weights will remain confidential.
03

Evaluate Potential Impact of Prior Notification

Informing students beforehand about the backpack weighing might influence the content of their backpacks due to awareness of the study. Students could modify what they carry that day to align with what they perceive as average, potentially skewing the results from typical daily payloads.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with 91影视!

Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Data Collection
Data collection is the foundation of any research study, providing raw information for analysis.
Gathering student backpack weights requires careful planning and execution to ensure reliable data. Here's how to approach it:
  • Begin by deciding on the measuring unit: kilograms (kg) or pounds (lb). This allows for clear communication and comparison of data.
  • Ensure consistency by using the same scale for all measurements, avoiding any discrepancies that could arise from using different scales.
  • Choose a digital scale known for its accuracy, ideally one that measures in increments of 0.1 kg or 0.1 lb. This level of precision gives a more accurate picture of the backpacks' weights.
  • Place the scale on a stable surface to avoid errors caused by instability. This simple step can prevent fluctuating readings.
  • As students put their backpacks on the scale, ensure they place it gently and refrain from touching it until the measurement is recorded.
  • Keeping a systematic recording method is crucial. Note each measurement immediately to maintain accurate records.
Measurement Accuracy
Measurement accuracy is crucial in research as it determines the reliability of your data. Even small inaccuracies can lead to invalid conclusions.
For backpack weighing:
  • Use a digital scale due to its higher precision compared to analog scales. This reduces the margin of error.
  • Verify the scale's calibration before starting the data collection, ensuring it reads zero with no load.
  • Consistency is key. Using the same properly calibrated device throughout the study helps eliminate variability from different equipment.
  • Pay attention to external factors that might affect the readings, like uneven surfaces or interference during measurement.
  • To minimize manual errors, double-check the readout before recording each weight.
  • By ensuring the scale and environment are optimal, you improve the accuracy and dependability of your research findings.
Participant Willingness
Participant willingness can significantly impact the outcome of your research. Ensuring participants are comfortable is key to collecting genuine data.
For this exercise:
  • Understand that while many students will cooperate, some might refuse due to privacy concerns or personal issues.
  • Approach participants with respect, explaining the study's purpose transparently to build trust.
  • Provide assurance that individual data will be kept confidential to alleviate privacy concerns.
  • Consider that notifying students in advance might affect their behavior, such as altering the backpack contents. This could influence the data's authenticity.
  • To mitigate this effect, it may be beneficial to randomly weigh backpacks without prior notice, while still respecting participants' right to opt-out.
By strategically approaching participants and considering their willingness, researchers can gather data that more accurately reflects typical conditions.

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

Use a random-number table to simulate the outcomes of tossing a quarter 25 times. Assume that the quarter is balanced (i.e., fair).

Modern Managed Hospitals \((\mathrm{MMH})\) is a national for-profit chain of hospitals. Management wants to survey patients discharged this past year to obtain patient satisfaction profiles. They wish to use a sample of such patients. Several sampling techniques are described below. Categorize each technique as simple random sample, stratified sample, systematic sample, cluster sample, or convenience sample. (a) Obtain a list of patients discharged from all MMH facilities. Divide the patients according to length of hospital stay ( 2 days or less, \(3-7\) days, \(8-14\) days, more than 14 days). Draw simple random samples from each group. (b) Obtain lists of patients discharged from all MMH facilities. Number these patients, and then use a random-number table to obtain the sample. (c) Randomly select some MMH facilities from each of five geographic regions, and then include all the patients on the discharge lists of the selected hospitals. (d) At the beginning of the year, instruct each MMH facility to survey every 500th patient discharged. (e) Instruct each MMH facility to survey 10 discharged patients this week and send in the results.

What is the difference between a parameter and a statistic?

Categorize these measurements associated with student life according to level: nominal, ordinal, interval, or ratio. (a) Length of time to complete an exam (b) Time of first class (c) Major field of study (d) Course evaluation scale: poor, acceptable, good (e) Score on last exam (based on 100 possible points) (f) Age of student

If you were going to apply statistical methods to analyze teacher evaluations, which question form, A or B, would be better? Form \(A\) : In your own words, tell how this teacher compares with other teachers you have had. Form \(B\) : Use the following scale to rank your teacher as compared with other teachers you have had. \(\begin{array}{ccccc}1 & 2 & 3 & 4 & 5 \\ \text { worst } & \text { below } & \text { average } & \text { above } & \text { best }\end{array}\) average \(\quad\) average
See all solutions

Recommended explanations on Math Textbooks

Theoretical and Mathematical Physics

Read Explanation

Mechanics Maths

Read Explanation

Statistics

Read Explanation

Discrete Mathematics

Read Explanation

Applied Mathematics

Read Explanation

Calculus

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.