A colleague of yours is faced with testing a relationship at the .05 level or significance or the .01 level of significance. What is your advice to your colleague?  Why?

Q: For which of the following situations would a repeated-measures research design be appropriate?…

A: Repeated Measure is a research design where one individual is taken twice for measurements. Once…

Q: Mika studies if age correlates with the average number of hours of sleep, so she selected a random…

A: Given: Age(x) 8 15 22 27 34 40 Sleep(y) 8 8 7 7 5 6

Q: When an analytical chemist uses the word precision when referring to the data obtained from an…

A: Precision is the closeness of the measurements to each other, whereas accuracy is the closeness of…

Q: Based on the histogram below, how are the data distributed, and where is the mean located in…

A: It is negatively skewed histogram.  where the tail of the distribution is longer on the left side…

Q: Suppose researchers conduct an analysis addressing the relationship between cigarette smoking and…

A:

Q: When would you use the median rather than the mean as a measure of central tendency? Why?

A: Mean: The arithmetic mean (also called the mean) is the most commonly used measure of central…

Q: You are told that your IQ scores falls at the 79th percentile.  What conclusion could you make about…

A: Percentiles: If the elements in the data set are arranged in ascending order of magnitude, then the…

Q: A health journal conducted a study to see if packaging a healthy food product like junk food would…

A: From the given information we conduct Z test for one mean.

Q: Mika studies if age correlates with the average number of hours of sleep, so she selected a random…

A: Given that

Q: How would you interpret the following data?

A: Regression Analysis:  The most extensively utilized analysis tool for exploring or measuring the…

Q: If you were to calculate a Rate Difference for the relationship of body mass index and ER-positive…

A: The null hypothesis is depicted as the hypothesis that considers no difference between the…

Q: Which of the following research situations is most likely to use a two sample independent-measures…

A:

Q: The Bank of Canada is interested in studying the relationship between mortgage rates and median home…

A: Given information: The data represents the values of the variables Interest rate (%) and Median home…

Q: If most of the prices in a large data set are of approximately the same magnitude except for a few…

A: Shape of the histogram:The shape of the histogram is said to be symmetric if it resembles a…

Q: Mika studies if age correlates with the average number of hours of sleep, so she selected a random…

A: Determine the sum of the values.   The sum of the values is obtained below as follows:   From the…

Q: what is the independent and dependent variable in the sentence below?   What is the level of…

A: Variables are any characteristics that can take on different values, such as height, age,…

Q: Consider a survey in which 1000 people are asked “How often do you go to the dentist?”  The variable…

A: Given: Number of people that have been involved in the study = 1000

Q: When the mean and the median are far apart in value, there may be some extreme values in the data…

A: If they're far apart, then the values are not normally distributed and the median is the better…

Q: An environmentalist wanted to determine if the mean acidity of rain differed among Alaska, Florida,…

A: a) Here we study mean acidity of rain at different locations, hence acidity of rain is response…

Q: Mika studies if age correlates with the average number of hours of sleep, so she selected a random…

A: The total of x(age) = 146 Total of X^2 = 4258 Total of y^2 = 302 Total of y(sleep time) = 42 Total…

Q: Determine whether the variables is qualitative or quantitative number of infants born in a month

A: Let QlV denote qualitative variable. Let QnV denote quantitative variable.

Q: Given the mean of a certain data set as 155, what will be its new mean if all the data points were…

A: Remark: We know that, The mean (average) of a data set is found by adding all numbers in the data…

Q: What steps should you follow in collecting the data of your study?

A: Data collection: In this stage, the data was collected from various sources for analysis. Here, the…

Q: Does the scatterplot below show evidence of a positive or negative linear relationship between the…

A: The given plot shows the scatterplot for the variable’s percent of people age 25+ with BA degree…

Q: A researcher wants to determine whether there is an association between weight and scores on the…

A: Given: R-value = 0.213 P-value = 0.3

Q: A statistic teacher recorded the Math and Science test scores of twelve students from one section.…

A: Data X  18,16,11,15,15,11,11,13,8,9,13,7 Data Y  20,18,12,17,15,14,12,14,10,13,12,9

Q: Consider the following research question, which will be answered using the data collected from the…

A: To draw statistical inference about the characteristics of population or process of interest the…

Q: From the (Job-Rating) data file provided in the Departmental File (RUN), answer the following…

A: It is given data file provides the job ratings, care analysis score, written presentation score and…

Q: Which of the following is closest to the proportion of people who responded no to color…

A: Total number of people, n = 1092 Number of people who responded no to color consideration and who…

Q: D. What can you say about any influential observations in the data? Justify your answer numerically.

A: Given: The data is given. Find: D) Influential observations.

Q: For the following titled report, indicate whether the research study involved was exploratory,…

A: Statistics:              Statistics is a great technique which is mainly used to collect the data…

Q: Given a data point x, what does the z-score tell us about x?

A: Solution: The Z score is also called as standard curve it tell us that how far from the data points…

Q: To assess the quality of recent research, which of the following question can be asked?

A: Need to check the quality of the research. Time and money are the factors which are important in…

Q: The correlation between two variables is r = −.78 based on a sample size of 137.

A: "Since you have asked multiple questions, we'll solve the first question for you. If you want any…

Q: Which statistical tool studies the relationship between two or more variables? a. Median b.…

A: Answer: Correct option is:  b. Correlation

Q: Suppose you were to collect data for the following pair of variables, drivers: blood alcohol level,…

A: In theory of statistics, dependent variable is the criterion or response variable.

Q: In one or two sentences describe your population. What did you use for your qualitative data? Is it…

A: 1. From the given information, the pie chart is given for species under three categories. In the…

Q: Which of the following measures of central tendency is fit for nominal data like employment status?…

A: Mean: It is the sum of an observations divided by the total number of observations of the data set.…

Q: If you have a known value of 16, which of the following is the best average of your data to verify…

A: Here  We have given a known value of 16 if we go through the option and find their lower and upper…

Q: what does ss tell us about a set of data? under what circumstances will the value equal 0? Can SS…

A:

Q: An introductory statistics class decides to investigate whether there is a relationship between the…

A: From the scatter plot we can see that the midterm 2 marks increases with the midterm 1 marks. We…

Q: Is the following nominal, ordinal, or interval data? Explain your answer.  Stock prices

A:

Q: Consider the following data. Which of the following options best describes the relationships between…

A: The given plot shows the dot plot.

Q: Mika studies if age correlates with the average number of hours of sleep, so she selected a random…

A: The objective is to determine if there is a significant relationship between a person's age (x) and…

Q: A statistic teacher recorded the Math and Science test scores of twelve students from one section.…

A: Consider, y y^2 20 400 18 324 12 144 17 289 15 225 14 196 12 144 14 196 10 100…

Q: From the graphs displayed, is there evidence to suggest that there is a positive linear relationship…

A: The given first chart is a scatterplot with square feet variable scaled on the y-axis against the…

Q: Verbal intelligence was a topic tha was very interested in. She conduc study to see whether children…

A: Reading vocabulary writing ADHD Combined type       Inattentive type       symptoms but not…

Q: For data on "volumes of milk dispensed into 2-gallon milk cartons," should you use the mean or the…

A: Mean is the measure of central tendency which is the generally considered the best measure of…