Pearson eText Biology: Science for Life with Physiology -- Instant Access (Pearson+)
6th Edition
ISBN: 9780135214114
Author: Colleen Belk, Virginia Maier
Publisher: PEARSON+
expand_more
expand_more
format_list_bulleted
Videos
Textbook Question
Chapter 1, Problem 12LTB
What features of the story on milk chocolate and heart health described in question 11 should cause you to consider the results less convincing?
- The study was sponsored by a large milk chocolate manufacturer;
- A total of 10 rats were used in the study;
- The only difference between the rats was that human participants of the experimental group received chocolate along with their regular diets, and the human participants of the control group received no additional food;
- The reporter notes that other studies indicate milk chocolate does not have a beneficial effect on heart health;
- all of the above
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
What is the benefit of doing a modified Furter-Meyer Test? What is the premise of this experiment? How would you know if this test yielded a positive result?
Could you please put in order the following experiment (erase the ones that are not needed):
1) A total of 8 bags will be made, Bags 1-4 will be the control group and 5-8 will be the test group.
2) Put 1 unripe pear in each of the control bags. Seal each bag and one unripe pear and 1 banana in each of the test bags and seal them.
3)Place all the bags together and record the observations from the initial appearance to the final appearance of the fruit each day.
4)After a few days the ripening status of them is tested by staining them with the iodine solution.
5) After preparing the iodine solution, pour the iodine stain into a shallow tray and dip it with a half-cut pear.
6) Allow the fruit to absorb the stain and remove and rinse it with water.
7) Repeat the step by adding more stain as needed to observe the ripening status.
The mean weight of loaves of bread produced at the bakery where you work is supposed to be 1 pound. You are the supervisor of
quality control at the bakery, and you are concerned that new employees are producing loaves that are too light. Suppose you
weigh an SRS of bread loaves and find that the mean weight is 0.975 pound.
What are the appropriate hypotheses for performing this significance test?
Ho : x = 1; H. : x < 1 where i = the sample mean weight (in pounds) of bread loaves produced at the bakery.
Ho : u = 1; H. : µ < 1 where u = the true mean weight (in pounds) of bread loaves produced at the bakery.
Ho : µ < 1; H, : H = 1 where u = the true mean weight (in pounds) of bread loaves produced at the bakery.
Ho : u = 1; H. : p = 0.975 where u= the true mean weight (in pounds) of bread loaves produced at the bakery.
Ho : u = 1; H. : u # 1 where u= the true mean weight (in pounds) of bread loaves produced at the bakery.
Chapter 1 Solutions
Pearson eText Biology: Science for Life with Physiology -- Instant Access (Pearson+)
Ch. 1 - Add labels to the figure that follows, which...Ch. 1 - Which of the following is an example of inductive...Ch. 1 - A scientific hypothesis is ___________. an...Ch. 1 - How is a scientific theory different from a...Ch. 1 - Prob. 5LTBCh. 1 - If I perform a hypothesis test in which I...Ch. 1 - Prob. 7LTBCh. 1 - Prob. 8LTBCh. 1 - A relationship between two factors, for instance,...Ch. 1 - A primary source of scientific results is...
Ch. 1 - Prob. 11LTBCh. 1 - What features of the story on milk chocolate and...Ch. 1 - Prob. 1AAATBCh. 1 - In an experiment examining vitamin C as a cold...Ch. 1 - Prob. 3AAATBCh. 1 - Prob. 1GFOCh. 1 - Much of the research on common cold prevention and...Ch. 1 - The science that you learned in this chapter has...
Additional Science Textbook Solutions
Find more solutions based on key concepts
Why is it unlikely that two neighboring water molecules would be arranged like this?
Campbell Biology (10th Edition)
2. A gene is a segment of DNA that has the information to produce a functional product. The functional product ...
Genetics: Analysis and Principles
CAUTION How can evolutionary fitness be estimated? a. Document how long individuals survive. b. Count the numbe...
Biological Science (6th Edition)
Consider the experiment described in Section 2.1 in which Ted Garland and colleagues bred mice to run long dist...
Evolutionary Analysis (5th Edition)
More than one choice may apply. Using the terms listed below, fill in the blank with the proper term. anterior ...
Essentials of Human Anatomy & Physiology (12th Edition)
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- You are asked to draw and explain the goal of the Meselson-Stahl (1958) Experiment as outlined in the classroom. You need to draw your own diagram and use short sentences to explain the steps and/or important points, deductions. Clearly state what happens at each step.arrow_forwardImagine this experimental modification of the Griffith and the Avery, McLeod and McCarty experiments: You heat kill smooth (S) and rough (R) strain Streptococcus pneumoniae. You make an extract from the S cells and treat it as described below, then combine the extract with heat killed R cells and inject this into mice. Which of the following statements would be true? select all correctarrow_forwarda) Which concentration of anesthetic has the least variation in it's effect on muscle contraction? Question 15 options: 10-6 10-7 10-10 10-8 b) What might the vertical capped bars (Τ) in the graph represent? Choose all that apply. Question 16 options: standard deviation standard error of the mean degrees of freedom number of replications of the experiment c) Which of the following statements accurately describes the effect of anesthetic on muscle contraction? Choose all that apply. Question 17 options: There is a positive relationship between number of muscle contractions and mean anesthetic concentration decreases There is a negative effect of anesthetic concentration on muscle contraction As concentration of anesthetic is…arrow_forward
- Which of the following statements is not true? a. Some RCTs may involve "cross-over" as part of their design b. Community trials may or may not involve randomization c. The participants for a randomized controlled trial must be randomly selected from the target population d. All RCT participants randomized into the treatment group and the control group must be included in data analysis, even if some of them did not complete the studyarrow_forwardWhat is the purpose of randomization in a randomized controlled trial? a. To ensure that there are fewer adverse effects b. To ensure that participants are unaware as to whether they are receiving the medicine or the placebo c. To ensure that participants in the treatment group and those in the pacebo (or control) group are as similar as possible when the study begins d. To ensure that participants in the trial are representative of the target populationarrow_forwardBy convention, when the difference between the observed experimental outcome and the expected outcome is less than 5 percent (< 0.05), the experimental results are considered to be Group of answer choices a)less than one standard deviation from the mean. b)within the normal range. c)not significant. d)statistically significant and different from the expected outcome.arrow_forward
- A researcher reads a news report about a high prevalence of diabetes among children residing in under resourced neighborhoods. The researcher wants to conduct a study to understand risk factors for diabetes in this population. They design a randomized controlled trial where children will be assigned to one group in which they are given 8 glasses of sugar sweetened beverages (SSB) per day (treatment group) and one group in which they are given 8 glasses of water per day (control group). The researcher goes to elementary schools in under resourced neighborhoods and approaches children as they are leaving the campus to tell they they have to participate in the study. The students are not told anything about the potential risks or benefits of study participation and are not compensated for being in the study. Drinking 8 glasses of water per day is known to be better for health compared to drinking 8 glasses of SSB per day. Because one treatment is already known to be more…arrow_forward1. What are the independent and dependent variables in each of the experiments? 2. What information should be added to the diagram to give the reader a better understanding of how these experiments were conducted? 3. What items should have been CONTROLLED in the experiments? 4. How much confidence would you have in the conclusion of experiment 3 if you found out that the temperature was not controlled? Explain your reasoning. 5. Create your own flow chart to answer a causal question.arrow_forwardUsing your knowledge of Bayes’ Theorem, solve the following. A patient goes to see a doctor. The doctor performs a test where 95% of people who are sick test positive and 99% of the healthy people test negative. The doctor knows that only 1 percent of the people in the country are sick. (a) What is the false positive rate? (b) The false negative rate? (c) If the patient tests positive, what are the chances the patient is sick?arrow_forward
- You are testing whether or not there is a difference between the weights of healthy mice, and those infected with the mouse equivalent of COVID-19. You notice that the sick mice tend to have lower weight. To see if this is statistically significant, you run a t-test. What are your null and alternative hypotheses? Choose the best answer. O a. Null: Slck mice have lower weights than healthy mice; Alternative: There is no difference between the groups O b. Null: There is no difference between the groups; Alternative: There is a difference between the groups c. Null: Sick mice have higher weights than healthy mice; Alternative: Sick mice have lower weights than healthy mice O d. There is no difference between the groups; Alternative: Sick mice have higher weights than healthy micearrow_forwardWhy is it a good idea to perform three trials at each temperature? How would you modify the experiment to produce more reliable results?arrow_forwardExplain what Avery’s experiment showed in 1944. Briefly describe the idea behind the experimental set up. Mention the step by step findings and the conclusions.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Animal Communication | Ecology & Environment | Biology | FuseSchool; Author: FuseSchool - Global Education;https://www.youtube.com/watch?v=LsMbn3b1Bis;License: Standard Youtube License