Week 1 Quiz Flashcards
Q1: What is a t-distribution?
a. A means of calculating the standard error
b. A representation of the distribution of the means
c. A means of calculating probability
d. A probability distribution that changes shape as the degrees of freedom increase
d. A probability distribution that changes shape as the degrees of freedom increase
Q2: Which of the following statements would be considered a two-tailed hypothesis?
a. A female doctor will be more empathetic than her male counterpart.
b. As rates of immunization for measles increase, the incidence of measles will decrease.
c. There will be a relationship between a healthy balanced diet and feelings of well-being.
d. The use of antibiotics will not impact the progression of a viral infection.
c. There will be a relationship between a healthy balanced diet and feelings of well-being.
Q3: Which of the following statements best describes the value of an ‘effect size’ to research?
a. It has a key role to play when calculating assumptions about collected data.
b. It is a vital statistic when calculating the significance of an experimental study.
c. It is a measure of the power of an experiment and therefore its significance.
d. It is a standardized measure that allows for the comparison across different studies that have used different variables or measurement scales.
d. It is a standardized measure that allows for the comparison across different studies that have used different variables or measurement scales.
Q4: A frequency distribution in which low scores are most frequent (i.e., bars on the graph are highest on the left-hand side) is said to be:
a. Positively skewed.
b. Leptokurtic.
c. Platykurtic.
d. Negatively skewed.
a. Positively skewed.
Q5: Of the following results of studies undertaken, which could have been subject to a Type II error?
a. A study of the use of silver nitrate dressings versus the use of acupuncture demonstrated equal healing times for the treatment of leg ulcers within the elderly community. The researchers concluded that both types of treatment were equally effective.
b. A study of sleep behavior showed that there is a relationship between raised body temperature and the number of hours of sleeping. The conclusion drawn was that a person would sleep more if they had a high body temperature.
c. In a study of children’s reading habits at home, a relationship between reading and eating bananas was found. The conclusion was drawn that eating bananas improved reading ability.
d. Following the discovery that a person’s pain threshold increases when subjected to repeated electrical stimulation, researchers concluded that shock therapy is recommended for pain control.
a. A study of the use of silver nitrate dressings versus the use of acupuncture demonstrated equal healing times for the treatment of leg ulcers within the elderly community. The researchers concluded that both types of treatment were equally effective.
