A researcher is interested in studying how the number of books parents read to their children can influence a child's reading skills in kindergarten. She randomly assigns families with 5 year old children to either read their child 3 books per day, 2 book per day, or 1 book per day for the first 2 months of kindergarten. They then measure the children's reading ability. What is the independent variable?

Q: A researcher wants to see if gender and / or income affects the total amount of help given to a…

A: Ans: Step 1Given: The researcher wants to see if gender and / or income affect the amount of…

Q: A criminologist studied fear of crime, age, and gender of people who were present for Hurricane…

A: Dependent variable:The dependent variable is the quantity under study based on a number of factors,…

Q: A DNP student wants to evaluate the change in knowledge scores of a group of cardiac patients after…

A: In given problem, a DNP student obtains a pretest at the beginning of class and immediately after…

Q: What is the independent variable and dependent variable in this question

A: There are two variables Level of parenting stress Number of children (one child and two or more…

Q: Lauren obtained a significant FOBT from an experiment with five levels. She immediately concluded…

A: Hypothesis is an assumption that is being tested.

Q: You are the manager for a family medicine clinic that has 3 physicians.  The staff have come to you…

A: In order to determine whether there is significant difference in between the mean number of patients…

Q: Officer James has noticed a strong positive correlation between the speed of the vehicles on Main…

A: The best experiment for given problem out of given options is, Officer James could view traffic…

Q: The researcher wants to know if exercising before watching a play causes people to show more…

A: The researcher picks participants from the exercise group or the control condition. Explanation:…

Q: What does it mean to say that two variables are positively​ associated? Negatively​ associated?

A: Association: The association of how two varaibles are connected with each other. It decides how one…

Q: You use “number of hours spent relaxing” as the dependent variable in a study. Choose two possible…

A: Are dependent variable is the one that is affected by the change in the value of the independent…

Q: A researcher conducts an experiment to determine whether moderate doses of St. John's Wort have any…

A: Given that, a researcher conducts an experiment to determine whether moderate doses St. John’s Wort…

Q: A research study was conducted to examine if a new antidepressant could lower depression for…

A: This problem can be solved by defining dependent and independent variable.

Q: A researcher wants to know if brighter lights make factory workers more productive. Workers in a…

A: Independent Variable is the brightness of the lights. Dependent Variable is the productivity of the…

Q: Does PTSD make you a violent person?  Does this question have two Variables?

A: We are given a statement "Does PTSD make you a violent person? " We have to determine whether there…

Q: What is the Independent variable and the Dependent variable in the example above? An experimenter…

A: a) Independent variable = Type of Milk the researcher feeding the infant. Dependent variable =…

Q: A researcher conducts a study examining how the brain chemical serotonin is related to aggression.…

A: (1)   State the hypotheses.   Obtain the value of the test statistic.   The value of the test…

Q: A psychologist conducted a survey of the attitude towards the sustainability of American energy…

A: Attitude Observe Value (280×2nd survey) Expected Value (280×1st survey)…

Q: An experiment is conducted to examine the effects of ingesting hot dogs, pizza, ice cream, sour…

A:

Q: A company wants to study the effects a new drug has on alleviating pain.  Some patients at doctor’s…

A: Variable of interest is the is the variable which is changing  and that is measured.

Q: A researcher conducts an independent-measures study examining how the brain chemical serotonin is…

A: A. Null and alternate hypotheses: The investigator is specifically interested to test whether the…

Q: An experimenter investigated the effects of blue light exposure on people’s sleep quality.…

A: In the given research problem, there are two independent samples- Blue light and No Blue light. The…

Q: In a study of visual acuity, participants view an image under low lighting, moderate lighting, or…

A: We have given that- The participants view an image under low lighting, moderate lighting, or high…

Q: What are the effects of low-fat food labels on food consumption? Do people eat more of a snack food…

A: (a) There are 2 factors in this case Serving Size Regular or Low Fat Serving Similarly, there are…

Q: Sarah is interested in whether the extent to which parents are involved in their children's school…

A: In this case, it is interested in whether the extent to which parents are involved in their…

Types of Bias

Statistics is the study of data collection, organization, analysis, interpretation, and presentation. Statistical bias is a characteristic of a statistical technique or its findings in which the expected value deviates from the actual root quantitative parameter being estimated. According to the actual definition of bias, it refers to the tendency of a statistic to overestimate or underestimate a parameter.