A researcher wants to describe how fine motor skills change as a group of infants age from 18 to 24 months. Describe how this study could be done as a cross-sectional design. Next, describe how this study could be done as a longitudinal study. Although the cohort effect can be a serious problem for cross-sectional research, it is not a problem for longitudinal designs. Explain why not.

Q: *Why is data preparation important to the analysis process and why not being a good steward of the…

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Q: what is a quantitative variable that would have a positive correlation with credit scores? That is,…

A: Correlation between two variables measure the strength and direction between two variables. It…

Q: In a survey of the number of televisions (TV's) owned by households, the data would be…

A: We have to find  correct answer..

Q: What are the different types of data?

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Q: Although the cohort effect can be a serious problem for cross-sectional research, it is not a…

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Q: Most engaged couples expect or at least hope that they will have high levels of marital…

A: The following hypothesis can be formed H0: μhomosexual=μheterosexualHA: μhomosexual<μheterosexual…

Q: Illustrate a data set with 10 numbers that has a negative correlation?

A: Negative correlation: It is a inverse relationship between two variables.   In simple words consider…

Q: How should we analyze the data?”

A: Once the data is rightly collect there  are several  processes to be  for data Analysis in…

Q: How can I create a histogram when the only data I have is the percentage of 16 year olds who used…

A: To construct the histogram, the first thing is to determine the number of class intervals. There is…

Q: A lecturer would like to analyse whether there is a relationship between the country of origin of…

A: First Variable is Country of origin of international students and second variable is Number of hours…

Q: More realistically, suppose you can collect observational data on several thousand fourth graders in…

A: In our country, you are asked to conduct a study to determine whether smaller class sizes lead to…

Q: If the correlation between two variables is close to 0, you can conclude that a scatterplot would…

A: Correlation tell us association between two variables. Correlation coefficient ranges from -1 to…

Q: What variables do Teczar find to have the most significant controlled associa

A: From the given information, The table of correlations is, Women in Ministries sample size 0.5…

Q: What method(observational, designed, retrospective) is mostly used in gathering a data in a high…

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Q: It is desired to investigate whether there is a relationship between gender and occupational groups.…

A: To examine the strength of association (or) relationship between two variables the following are the…

Q: the variance of a data set is 144 and mean is 72 then coefficient of variance is

A: Given,variance(σ2)=144mean(x¯)=72

Q: A study wants to do research on whether or not the median age of social media users is getting…

A: The study seeks to investigate whether the average age of social media users is small or not. Data…

Q: Every Statistics textbook states that correlation is not causation. What are the differences between…

A: Given information: It is asked to write the differences between correlation and causation.

Q: Why do we want to avoid bias when collecting data?

A: Bias : It is any trend or deviation from the truth in data collection, data analysis, interpretation…

Q: Students often incorrectly use the term "bias" to describe anything that is wrong with a research…

A: Sampling Bias and the presence of a Confounding Variable are two different problems for research,…

Q: true about the type of data?

A: A team of researchers was requested to collect data on the household expenditure of two groups…

Q: Two researchers studied the relationship of positive emotions and longevity by examining smile…

A: The objective is to find the research method used when two researchers studied the relationship…

Q: Why does the observed mean difference should not be taken seriously?

A: Mean difference(MD): Mean Difference is also known as Difference in means. Mean difference measures…

Q: If a researcher measured hearing acuity and age for a group of people who were 50 to 90 years old,…

A: If a researcher measured hearing acuity and age for a group of people who were 50 to 90 years old,…

Q: Why do the study on the data variability is called as the complementary to the study on central…

A: Central tendency is the tendency of the quantitative data set to cluster around the some central…

Q: What equation should be used in significance of the value found in scatter diagram of the data

A: A scatter plot is a graphic tool used to display the relationship between two quantitative…

Q: What is Scatterplot?

A: Scatterplot: A scatterplot is a type of data display that shows the relationship between two…

Q: a study was conducted that showed strong positive correlation between eating strawberries and the…

A: Introduction: Correlation and causation are two important concepts in Statistics. The two concepts…

Q: Define the term Sample Correlation? why it is used in linear equation?

A: Correlation measure linear relationship between the variables.   Correlation: Correlation is used to…

Q: What is the shape of this data analysis?

A: Given data:

Q: Does the shape or color of a pain pill influence its effectiveness?  Although logically it…

A: Given Information: Four groups of adult patients were given the same amount of Advil after dental…

Q: Provide a reason why the classication of data is important.

A: In this case, we need to find the reason for the importance of data classification.

Q: How can I describe this set of data based on statistics?

A: Following observations can be made from the given data. Standard deviation has a lower value as…

Q: Report the correlations between the three independent variables (age, educ and Protestant) and your…

A: The correlation is used to estimate whether there is any significance relationship between the two…

Q: If it was found that two variables have a statistically significant relationship, we conclude that…

A: Correlation:   Correlation gives the information about strength of the association and direction of…

Q: How can graphics and/or statistics be used to misrepresent data?

A: Graphical representation or statistical data can be misleading or misrepresented. Some statistics…

Q: Your Statistics instructor wants to determine whether students who have previously taken an online…

A: The response variable is also known as the dependent variable.

Q: A scientist wants to examine factors that may be related to cancer. The scientist believes that…

A: Two-factor ANOVA is an appropriate test to be used here.

Q: What is primary data?

A: In this case, we need to define the primary data.

Q: Describe a real-world example in which one measure of central tendency provides useful information…

A: Let us consider a dataset representing the total money drawn for 10 days- Since there is an outlier…

Q: After being hired as a financial advisor for a large real estate company, you have been tasked with…

A: From the given information, Property Taxes Size 21928 2449 17339 2479 18229 1890 15693…

Q: A study was done to determine if food insecurity/hunger impacts psychological distress (this is fake…

A: Provided data is,  No food insecurity Moderate food insecurity Severe food insecurity 5…

Q: If a histogram is skewed to the right, explain how this affects the decision making process?

A: In a right-skewed histogram, the tail on the right side is longer than the left side.

Q: When the number of data is lesser than 30, what test – statistic are we going to use? How about when…

A: Let, there are two sets of data. One has lesser than 30 and another has more than 30 data. The test…