A medical researcher wanted to determine the effect of pH (a measure of alkalinity or acidity, with pure water having a pH of 7) on the growth of a bacteria culture. The table below gives the measurements of different cultures,

38,153 results
  1. CHEM

    You are a researcher for a golf club manufacturer. You are given two identical looking cubes of a metal alloy. You are informed that they are made of the exact same material, but one is a crystalline, while the other is amorphous. It is your job to

  2. mathematics

    A researcher conducted a survey of 6 teachers to determine how many times each teacher tutors students after school. The researcher recorded the findings in the table below. ​Teacher ​Number of Outcomes 1 ​18 2 ​ 15 3 ​12 4 ​23 5 ​ 15 6 ​

  3. Statistics

    A researcher measures eye color for a sample of n = 50 people. Which measure of central tendency would be appropriate to summarize the measurements? a. mean b. median c. mode d. any of the three measures could be used

  4. Medical Assisting

    I need help on this one question! 9. Explain the key training, education, and certification preparation needed for medical assistants? a. The AAMA requires licensure for medical assistants in some states. b. It is optimal for a medical assistant to have

  5. Social Studies

    What did Siddhartha Gautama, also known as the Buddha, want to achieve? A. He wanted to build monasteries throughout India. B. He wanted to free the world from suffering. C. He wanted to become a Hindu prince. D. He wanted to meditate for 100 days.

  6. American History

    What caused many people in the urban middle class to oppose Díaz’s dictatorship and support a political revolution? A. They wanted more land and better lives. B. They wanted a democratic government. C. They wanted better wages and homes. D. They wanted

  7. Math

    A political scientist wants to conduct a research study on a president's approval rating. The researcher has obtained data that states that 45% of citizens are in favor of the president. The researcher wants to determine the probability that 6 out of the

  8. psy 331

    Wilhelm Wundt is known for his research relating to introspection. During the use of this technique, participants receive: (Points : 1) subliminal messages from the researcher and are asked if they remember the messages. a stimulus from the researcher and

  9. math

    Problem of the Week Alternate Dimensions The four shapes to the right are each drawn with a horizontal base and a vertical height. Figure A is a right-angled triangle, Figure B is an isosceles triangle, Figure C is a square, and Figure D is a rectangle.

  10. Statistics

    Emissions of sulfur dioxide by industry set off chemical changes in the atmosphere that result in "acid rain." The acidity of liquids is measured by pH on a scale of 0 to 14. Distilled water has pH 7.0, and lower pH values indicate acidity. Normal rain is

  11. math

    during a clinical study, a medical company found 3 out of 70 people experienced a side effect when using a certain medicine. The company predicts 63,000 people will use the medicine next year. How many people are expected to experience a side effect?

  12. science

    Plants respond to their environment in many different ways. Design a controlled experiment to test the effect of one environmental factor (such as light, acidity of precipitation, etc.) on some aspect of plant growth. In your experimental design be sure

  13. Microeconomics

    Medical doctors earn higher incomes than people who have a Ph.D. in economics. This is partly because A. Medical doctors are more likely to face malpractice lawsuits. B. The costs of receiving necessary medical education are higher. C. A relatively small

  14. Law & Ethics

    describe the effect and the procedure for obtaining access to your medical records under Hipaa

  15. statistics

    A researcher wants to carry out a hypothesis test involving the mean for a sample of n = 20. While the true value of the population standard deviation is unknown, the researcher is reasonably sure that the population is normally distributed. Given this

  16. Chemistry

    Hi I'm doing a research paper on the PH of skin and was wondering if you could answer even a few of these questions. I am in high school. Thanks. what does ph have to do with skin? how would using alkaline products affect skin? what are some symptoms

  17. psych/statistics

    Consider the following: The television network you addressed in Week 4 is asking you to compare the moods of groups that watch different types of shows. You can choose what they mean by moods. You may compare them on general mood, happiness, depression,

  18. math

    A medical researcher believes that the standard deviation of the temperatures of newborn infants is greater than 0.6 degrees. A sample of 15 infants was found to have a standard deviation of 0.8 degrees. At the 0.10 level of significance, does the evidence

  19. Statistic

    Researchers collected samples of water from streams in a mountain range to investigate the effects of acid rain. They measured the pH (acidity) of the water (a lower pH means the water is more acidic). They then classified the steams with respect to the

  20. geometry

    1) A billboard on level ground is supported by a brace, as shown in the accompanying diagram. The measure of angle A is 15 degrees is greater than twice the measure of Angle B. Determine the measure of Angle A and the measure of angle B.

  21. Chemistry

    If a 0.1 mol/L solution is diluted to 0.01 mol/L, the: a) concentration of hydrogen ions increases b) pH decreases c) acidity constant decreases d) the acidity constant does not change I would think the ph decreases? no?

  22. health

    The purpose of environmental epidemiology studies is to prove that an environmental agent is the cause of a particular adverse effect. True False 2. Which of the following is not an accurate statement about dose-response? The NOAEL is the highest data

  23. Math

    The four shapes to the right are each drawn with a horizontal base and a vertical height. Figure A is a right-angled triangle, Figure B is an isosceles triangle, Figure C is a square, and Figure D is a rectangle. The figures are not drawn to scale. Using

  24. Algebra

    A medical researcher wanted to determine the effect of pH (a measure of alkalinity or acidity, with pure water having a pH of 7) on the growth of a bacteria culture. The table below gives the measurements of different cultures, in thousands of bacteria,

  25. math

    A medical researcher wanted to determine the effect of pH (a measure of alkalinity or acidity, with pure water having a pH of 7) on the growth of a bacteria culture. The table below gives the measurements of different cultures, in thousands of bacteria,

  26. algebra

    A medical researcher wanted to determine the effect of pH (a measure of alkalinity or acidity, with pure water having a pH of 7) on the growth of a bacteria culture. The table below gives the measurements of different cultures, in thousands of bacteria,

  27. math

    A medical researcher wanted to determine the effect of pH (a measure of alkalinity or acidity, with pure water having a pH of 7) on the growth of a bacteria culture. The table below gives the measurements of different cultures, in thousands of bacteria,

  28. math

    A medical researcher wanted to determine the effect of pH (a measure of alkalinity or acidity, with pure water having a pH of 7) on the growth of a bacteria culture. The table below gives the measurements of different cultures, in thousands of bacteria,

  29. Chemistry

    Can someone check my answers? Thanks. 1.) If you were involved in an acid rain monitoring project with several other samplers, why would it be important that all of you collect your samples on the same day and do the alkalinity tests within 24 hours? Acid

  30. Chemistry check

    Can someone check my answers? Thanks. 1.) If you were involved in an acid rain monitoring project with several other samplers, why would it be important that all of you collect your samples on the same day and do the alkalinity tests within 24 hours? Acid

  31. Chemistry (3rd time I've posted this)

    Can someone check my answers? I've posted this a couple times and no one has responded. Is no one responding because they're all right or what? 1.) If you were involved in an acid rain monitoring project with several other samplers, why would it be

  32. math statistics

    IQ scores in the US population have an average of µ = 100 and a standard deviation of σ = 15. Suppose a researcher wanted to test whether socioeconomic status (SES) has an effect on IQ scores. The researcher takes a random sample of n = 100 people,

  33. Psychology

    a researcher is studying people of normal weight and obese individuals. She wants to know how the time of day affects hunger feelings in the two groups. When, during the experiment, the researcher looks at her watch, she has introduced a/an __________ into

  34. Stastics

    A researcher wanted to test the effect of a new drug on reducing blood pressure. In the study, there were 35 participants. The researcher measured the participants’ blood pressure before and after the drug was administered. If we want to compare the mean

  35. math

    A researcher wanted to answer the following question: What is the difference in students' computer anxiety based on whether or not they own computers? The researcher surveyed 92 undergraduate education students via an online survey. In the survey, the

  36. Chem

    Ka1 = 4.5E-7 and Ka2 = 4.7E-11 for the carbonate system. Ksp is 5.0E-9 and Kw =1.0E-14. A town’s groundwater has [Ca2+] = 37 mg/L, alkalinity of 1.36E-3eq/L and pH of 8. This is to be mixed with surface water with [Ca2+] = 4mg/L, alkalinity of 8.0E-4

  37. Chem

    Ka1 = 4.5E-7 and Ka2 = 4.7E-11 for the carbonate system. Ksp is 5.0E-9 and Kw =1.0E-14. A town’s groundwater has [Ca2+] = 37 mg/L, alkalinity of 1.36E-3eq/L and pH of 8. This is to be mixed with surface water with [Ca2+] = 4mg/L, alkalinity of 8.0E-4

  38. Math

    Use the acidity model given by pH = −log[H+], where acidity (pH) is a measure of the hydrogen ion concentration [H+] (measured in moles of hydrogen per liter) of a solution. Compute [H+] for a solution in which pH = 6.2. (Enter your answer in scientific

  39. stsats

    A researcher wanted to answer the following question: What is the difference in students' computer anxiety based on whether or not they own computers? The researcher surveyed 92 undergraduate education students via an online survey. In the survey, the

  40. Stats

    I ran this an an independent samples t-test. It is a t rest according to the professor, just want to make sure I have the right one. A researcher wanted to answer the following question: What is the difference in students' computer anxiety based on whether

  41. Statistics

    I bemieve the t test is paired , want to make usre beofre I run the stats. A researcher wanted to answer the following question: What is the difference in students' computer anxiety based on whether or not they own computers? The researcher surveyed 92

  42. Chemistry

    In an experiment we have 4 liters of AlAin water in contain or A , and 2 liters of dubai water in contain out B . The alkalinity of water in container A and the alkalinity of water in container B are 50 and 150mg/l as caco3 ,,respectively the alkalinity of

  43. psychology

    Listed below are the effects of observation on research. Match the bias of the effect with the research situation described. Observation Bias: A. Researcher's own feelings B. Inadequate research methods C. Researcher's closeness to subjects D. Researcher's

  44. science

    Develop hypotheses predicting the effect of pyrite and coal on the acidity of water?

  45. Chemistry

    How do I do this problem? 1. A student did an alkalinity determination correctly, except that the sample titrated had a volume of 90.0 mL. Volume A was found to be 4.50 mL and Volume B was 7.00 mL. a) Calculate the alkalinity value from these data and then

  46. statistics

    A researcher is measuring problem-solving times for a sample of n = 20 children. However, one of the children fails to solve the problem so the researcher has an undetermined score. What is the best measure of central tendency for these data?

  47. Chemistry

    What is the general trend in the acidity of Period 3 oxides moving across the Periodic table from left to right? (Be sure to refer to the term acidity.)

  48. Stats

    A researcher wants to estimate the mean serum cholesterol level for college age women. In a past study the standard deviation for this measure was 42 units. of the researcher wants to be off in his estimate by no more than three units (with 99% confidence)

  49. Statistics

    A researcher wants to estimate the mean serum cholesterol level for college age women. In a past study the stndard devition for this measure was 42 units. If the researcher wants to be off in his estimate by no more than three units ( with 99% confidence),

  50. Science

    Name the type of research for each of the following and rank them 1-5 (1 strongest, 5 weakest: 5 points). A. A researcher collects questionnaires from people who exercise and nonexercising people to determine whether there was a difference in physical

  51. STAT

    Functional foods are those containing nutritional supplements in addition to natural nutrients. Examples include orange juice with calcium and eggs with omega-3. Kolodinsky, et al. (2008) examined attitudes toward functional foods for college students. For

  52. stats

    For each of the following situations, determine: a) the null and research hypotheses; b) the hypothesis test used (normal curve, single sample t-test, dependent samples t-test, independent samples t-test, ANOVA). For situations 1, 3, 4, and 5, also state

  53. college chemistry

    EPA acidity test can be performed by titrating water sample to a pH of 8.2. What titrant in what concentration would you suggest for EPA acidity determination?

  54. college chemistry

    a student did an alkalinity determination correctly,except that the sample titrated had a volume of 90.0 mL. Volume A was found to be 4.50 mL and Volume B was 7.00 mL. 1)Calculate the Alkalinity value from these data and then calculate the correct

  55. Statistics

    3. A researcher wanted to study the effect of low light environments on the growth of alfalfa plants, so she grew six plants and measured their heights after two weeks. She calculated a sample mean of 5.2 cm with a standard deviation of 1.1 cm. If the

  56. Math

    An astronomical researcher is using software to study the parabolic path of an asteroid. By entering the equation for the path of the asteroid, the researcher could determine if the asteroid would collide with any other bodies in the near future. The

  57. Math

    Anna wanted to measure the capacity of a large bucket. What unit of measure should she use? A. cups B. pounds C. inches D. gallons

  58. Chemistry

    To increase the acidity of soil, you can add peat, which contains a complex acid mixture known as humic acid. The complexity of the humic acid makes it difficult to determine how acidic you are making the soil. You decide to use a titration to get a better

  59. kaplan

    Below you will find a medical senerio that includes (3) medical records to read and a medical word chart. Please identify 15 medical terms that would be unfamiliar to layman or non-member medical person and place these terms in the chart below

  60. Statistics

    Need help with this statistics assignment. Of course not asking for you to do it, just an example or help on how to answer. Find some information in a book, research article, newspaper, magazine, or online about any kind of medical research that includes a

  61. stats

    A researcher conducted an experiment on the effects of a new “drug” on depression. The researcher had a control group that received nothing, a placebo group and an experimental group that received the “drug”. A depression inventory that provided a

  62. Triangles

    the measure of angle 1 is twice the measure of angle 2. the measure of angle 3 is 40 degrees less than the measure of angle 2. which of the following tools would you use to determine the measures of the three angles? justify your selection(s). then use the

  63. chemistry

    Acetic acid, CH3CO2H, is the active ingredient in vinegar. It's often abbreviated "HOAc". Vinegar is acidic because acetic acid makes H3O+ when it partially ionizes in water: HOAc(aq) + H2O H3O+(aq) + OAc–(aq) Suppose that you have a solution of

  64. bryant stratton

    provide a detail descripition and definition of medical language and terminology and its components. the narrative should also explore the importance of medical terminology to the medical assisting and medical administrive assisting field while describing

  65. Statistics

    I have a question that involves explaining what is wrong in each of the following situations: (a) A random sample of size 20 is taken from a population that is assumed to have a standard deviation of 12. The standard deviation of the sample mean is 12/20.

  66. Chemistry

    How do you calculate alkalinity in chemistry? Ex: List the values for total alkalinity for Sample A and Sample B A 104 drops of titrant (5.25mL) 3 drops of C20 H14 O4 B 81 drops of titrant (4.25mL) 3 drops od C20 H14 O4

  67. biology

    A researcher wanted to know how many fish were in a dam.He caught 20 fish and marked them by clipping out a small section of their tail fins.He then released them back into dam.A few days later he caught 25 fish and found that 8 had been marked 1.estimate

  68. history

    check: what effect did the Bakke decision have on affirmative action? a. it legalized racial quotas for admission to medical schools b. it encouraged African Americans to apply to medical schools c. it signaled the start of a backlash against affirmative

  69. statistics

    A random sample of n=16 scores is obtained from a population with a mean of µ= 80 and a treatment is administered to the sample. After treatment, the sample mean is found to be M=82. a)Assuming the sample contained n=16 individuals, measure the size of

  70. graphs and angles

    a survey about students government program at a school found that 120 students wanted an after school program and 240 students wanted durning school and 40 students wanted none, If a circle graph is made from this data, what would be the measure of the

  71. Chemistry

    I just wanted to see if my answers made sense. 1. What effect would each of the following have on your calculated value of Kf (too high, too low, or no effect)? In each case explain your answer. a) There was a small bubble in the thermometer, causing all

  72. Psychology

    To measure the relationship between age and cell phone use, a researcher should use a Correlation Central tendency A histogram Standard deviation A t test

  73. Statistics

    In a study of the effect of a medical treatment, a simple random sample of 300 of the 500 participating patients was assigned to the treatment group; the remaining patients formed the control group. When the patients were assessed at the end of the study,

  74. Earth Science

    Please help me with the following questions: 1. A scientist suspected that the increase in the acidity of ocean water could have a devastating effect on organisms such as snails because it could break down calcium carbonate, a chemical that makes up their

  75. Microeconomics

    Medical doctors earn higher incomes than people who have a Ph. D in economics. This is partly because A. Medical doctors are more likely to face malpractice lawsuits. B. The costs of receiving necessary medical education are higher C. A relatively small

  76. statistics

    A group of scientists is studying whether a new medical treatment has an adverse (bad) effect on lung function. Here are data on a simple random sample of 10 patients taken from a large population of patients in the study. Both variables are measurements,

  77. history

    can i please get some help on this question, what effect did the Bakke decision have on affirmative action? a. it legalized racial quotas for admission to medical schools b. it encouraged African Americans to apply to medical schools c. it signaled the

  78. chemistry

    The acidity of a water with initial pH of 5.5 was tested using the following procedure: The pH of a volume of 50.00 mL water sample was adjusted to 4.0 using 5 mL 0.1 N H2SO4 solution. Then this sample was titrated using 0.2 N NaOH. After addition of 7 mL

  79. biology

    All of the following important concepts of population genetics are due to random events or chance except mutation natural selection the bottleneck effect the founder effect sexual recombination I am pretty sure that the answer would be "natural selection",

  80. Medical sociology.

    Please help me urgently. Q1a. Elaborate on the general principle of sociocultural medical problems in Africa. 1b. Discuss on the scope of medical sociology. 1c. What do medical sociologist study?

  81. Statistics

    Variables in the dataset dietstudy Variable name Variable description id Patient ID Basetg Pre measurement lev Final tg Post Measur. Level Base wt pre measure level Final wt Post measure level A researches has collected data to investigate a research

  82. Statistics

    In an experiment, you measure the popularity of two brands of soft drinks (factor A), and for each brand you test males and females (factor B). The following table shows the main effect and cell means from the study: Factor A Level A1: Level A2: Brand X

  83. Science

    Which of the following can be accurately said about climax communities? A. Climax communities are always stable. (B. Restoration of the original climax community is always achieved at the same rate.) C. Climax communities are always uniform. D. Restoration

  84. Medical Billing and Coding

    Had to develop a paragraph using clear, varied sentences containing concrete words and transitions or connectives to create a logical flow. Need assistance in the following paragraph that describes on particular experience I had that inspired you or guided

  85. health

    A unit medical record system allows for amore detailed and comprehensive medical record. This record contains information that may be relevant to the following: past and current medical history, procedures undergone, and so forth >What are the advantages

  86. geometry

    if the sum of the measure of four angles of a pentagon is 396, determine the measure of the fifth angle

  87. STAT

    Do you view a chocolate bar as delicious or as fattening? Your attitude may depend on your gender. In a study of American college students, Rozin, Bauer, and Catanese (2003) examined the importance of food as a source of pleasure versus concerns about food

  88. Chemistry

    What are the Salts are taken into consideration in the calculation of the total alkalinity ????

  89. Algebra

    Could anybody help me with these two problems, or at least the 1st one? Thank you very much. „« The measure of the third angle of a triangle is 38 degrees more than the second angle. The measure of the first angle is two less than twice the second

  90. psychology

    An advantage of conducting an experiment vs. a correlational study is that: A the cause is not related B the researcher can manipulate the situation being studied C experimenter effect increase the empirical evidence D two variables are either related or

  91. Algebra

    Determine the measure of each exterior angle. The triangle looks like an upside down A with one line running longer at the point. The inside angles are A- 50 and in the next corner 75. In the bottom of the A-letter I need to solve for C and A and the extra

  92. statistics

    To test H0:µ =80 versus H1:µ < 80, a simple random sample of size n = 22 is obtained from the population that is known to be normally distributed. (a) If = 76.9 and s = 8.5, compute the test statistic. (b) If the researcher decides to test the hypothesis

  93. social studies

    What caused the Pilgrims to settle in New England? A They wanted to escape poverty and starvation. B They wanted to take part in the fur trade. C They wanted to practice their religion freely. D They wanted to convert American Indians to Christianity.

  94. health

    How might the increase in medical technology have a negative effect on communication among providers? Provide at least two examples. Are there any positive effects of increased technology on communication among providers? Why or why not? How does the

  95. health

    How might the increase in medical technology have a negative effect on communication among providers? Provide at least two examples. Are there any positive effects of increased technology on communication among providers? Why or why not? How does the

  96. chemistry

    Calculate the "exact" alkalinity of a water that contains 0.6580 mg/L of bicarbonate, as the ion, at a pH of 5.66.

  97. statistics

    Effect size is a measure of:

  98. statistics

    The researcher wanted to test the hypothesis that Ho: μ=3, knowing the population, which was normal, had a variance of 1.00. -- How powerful would this test be against the alternative hypothesis that Ha: μ=4, given that n=15, α = .05

  99. Statistics

    Which of these statements is always true for a researcher who is using standard statistical methods in a test of significance? A. A researcher who rejects a true null hypothesis has committed a Type II error. B. A researcher who rejects the null hypothesis

  100. Penn Foster

    Would you please help me with these two questions on which i am not sure of my answers.? I marked my answers with a parenthesis. On the second question I can not make up my mind between c & d. Thank you for any assistance you can provide. waiting for your

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