Question 1

Which of the following is the appropriate symbol for mean?

Accepted Answer

"M" is commonly used to represent the mean in statistical calculations, while "Mdn" represents the median, "Mn" is not commonly used, and "Mo" represents the mode.

Question 2

Dante had to complete a project for his statistics class.He was tasked with going to a nursing home and recording the various types of physical activity and how often residents engaged in each activity on a given day.Dante then had to organize the information in a clear and concise manner.Dante probably displayed his information in a(n):

Accepted Answer

Dante was recording the frequency of different types of physical activity, which fits the definition of a frequency distribution. An observation schedule is a tool used to systematically record observations, but it does not involve organizing the data in a clear and concise manner. A coding system is a way to assign numbers or labels to data, but it does not necessarily involve organizing the data in a clear and concise manner. A mode is a statistical measure that represents the most common value in a dataset, but it does not involve organizing the data in a clear and concise manner.

Question 3

Which of the following is the appropriate symbol for mode?

Accepted Answer

Mo is the appropriate symbol for mode. It is commonly used in statistical notation to represent the mode, which is the most frequently occurring value in a data set.

Question 4

Dr.Regent was evaluating the inter-rater reliability between Trisha and Fitz's study observations.Which would be the most appropriate statistic to measure agreement between their observations?

Accepted Answer

Cohen's kappa is the most appropriate statistic to measure agreement between two raters or observers. It takes into account the possibility of agreement occurring by chance and provides a measure of the degree of agreement beyond chance. Cohen's d is a measure of effect size, Cohen's f is a measure of association, and Cohen's alpha is a measure of internal consistency.

Question 5

Kiyoko is wondering which friend sends and receives the most text messages,on average,during a 1-week period.Kiyoko records the number of text messages received and sent for each friend at the end of each day.Which measure of central tendency would most accurately answer Kiyoko's question?

Accepted Answer

The answer of Kiyoko is wondering which friend sends and...

Question 6

Catrina wants to determine which book on the summer reading list is most preferred by her students.She has collected data at the beginning of the school year for the last 3 years.What statistic should she use to show the most frequently reported preferred book?

Accepted Answer

The mode is the best choice to determine the most frequently reported preferred book as it represents the value that appears most frequently in the dataset. Therefore, Catrina can identify the book that has been reported as the most popular choice by her students across the three years of data collection. The median and mean may not accurately represent the most preferred book as they are affected by outliers and do not give insight into the frequency of responses. The range does not provide any information about the preferred book, but rather the spread of the data.

Question 7

Which of the following is NOT a measure of central tendency?

Accepted Answer

None of the options listed in Choice B are measures of central tendency. The correct measures of central tendency are M (mean), Mo (mode), and Mdn (median).

Question 8

Research suggests that a value of _____ or higher indicates high inter-observer reliability.

Accepted Answer

A value of .7 or higher indicates high inter-observer reliability. Option A (.05) indicates a low level of reliability, while option B (.5) and option D (1.2) are not valid options as the range of possible values for inter-observer reliability coefficients is 0 to 1.

Question 9

Which of the following is the most appropriate calculation to determine the level of agreement between two observers coding categorical items?

Accepted Answer

Cohen's kappa is the most appropriate calculation to determine the level of agreement between two observers coding categorical items. It takes into account the possibility of agreement occurring by chance and is widely used in inter-rater reliability studies. Cohen's f and Cohen's d are used to calculate effect size in experimental studies, while Cohen's alpha is used to calculate internal consistency reliability in psychometric studies.

Question 10

Inter-observer reliability calculations can range from:

Accepted Answer

The answer of Inter-observer reliability calculations can range from:
...

Question 11

According to the text and recent studies,spanking remain a common practice in the United States,with approximately _____ of parents still using this form of discipline.

Accepted Answer

The text mentions that spanking remains a common practice in the United States, and a recent study cited in the text found that approximately 80% of parents in the US use spanking as a form of discipline. Therefore, C) 80% is the best choice.

Question 12

Kyra wanted to determine what types of monetary currency was used to pay for merchandise at a local bargain store.She noted there was an assorted use of currency including,but not limited to,dimes,quarters,$5 bills,$20 bills,and $100 bills.To easily explain the selection of currency taken by the bargain store Kyra should use_____ to describe the data collected.

Accepted Answer

The answer of Kyra wanted to determine what types of...

Question 13

Chanelle needs to choose a measure of central tendency that is less influenced by outliers.Which measure of central tendency would be most appropriate?

Accepted Answer

The median is less influenced by outliers compared to the mean and the mode. The median is the middle value of a set of data when arranged in order, and extreme values do not significantly affect it. Therefore, Chanelle should choose the median as a measure of central tendency when dealing with data that contains outliers.

Question 14

Which of the following is the appropriate symbol for median?

Accepted Answer

The appropriate symbol for median is Mdn. It is a common abbreviation and commonly used in statistical notation.

Question 15

Triny has been recording the number of times she says "um" for the last 7 days to help improve her public-speaking grade.She recorded the following data for the last 7 days: 23,27,12,10,5,5,5.What is the approximate average number of times she says "um" over the 7-day period?

Accepted Answer

The answer of Triny has been recording the number of...

Question 16

Charlese creates charts showing her teacher the number of times she referred to her notes,PowerPoint slides,textbook,flashcards,and classmates to study for the last three exams in the class.Charlese has unknowingly developed a(n):

Accepted Answer

Charlese's charts show the frequency of her use of different study resources, which is a characteristic of a frequency distribution. A continuous variable refers to a measure that can take any value on a continuous scale, such as weight or height. Interval recording and duration recording are methods of collecting behavioral data in psychology and are not relevant to Charlese's study habits.

Question 17

Categorical data is best visually represented by a:

Accepted Answer

Categorical data is best represented by a bar chart where the height of each bar represents the frequency or proportion of each category. This type of graph allows for easy comparison between categories and is simple to read and interpret.

Quiz 6: B: Observational Research: The Many Forms of Discipline in Parents Bag of Tricks