What are the response variables and explanatory variables for observing vehicles to see what the cars do as they approach a stop sign during rush hour on a local street?

Data were collected on the times to recovery (in days) for athletes who had serious concussions. There were two data sets. One data set consisted of the recovery times of 200 athletes who were treated for their concussion and the other data set consisted of the recovery times of 200 athletes who received no treatment for their concussions. The histograms summarize the two data sets. For simplicity call the histogram on the left Figure 1, and the one on the right Figure 2. (a)Researchers claim that those who were not treated for concussion tended to have longer recovery times than those who were treated. According to this claim, which of these two histograms corresponds to the data for those who were not treated? (b) In no more than two sentences, justify your answer to part (a). (c) From Figure 1, find the (approximate) proportion of athletes that recovered in 55 or fewer days. (d) Which measure of centrality would you prefer to use for the data that led to Figure 2: the sample mean or…

A researcher conducts a study comparing anxiety levels in teens based on their social media usage. Teens with higher scores on the anxiety measure are considered more anxious. Below is a table made from their results. Briefly interpret the results by explaining both descriptive and inferential statistics identified.

You work as a data scientist for a real estate company in a seaside resort town. Your boss has asked you to discover if it's possible to predict how much a home's distance from the water affects its selling price. You are going to collect a random sample of 7 recently sold homes in your town. You will note the distance each home is from the water (denoted by x, in km) and each home's selling price (denoted by y, in hundreds of thousands of dollars). You will also note the product x.y of the distance from the water and selling price for each home. (These products are written in the row labeled "xy"). (a) Click on "Take Sample" to see the results for your random sample. Distance from the water, .x (in km) Take Sample Selling price, y (in hundreds of thousands of dollars) xy Send data to calculator Based on the data from your sample, enter the indicated values in the column on the left below. Round decimal values to three decimal places. When you are done, select "Compute". (In the table…

A categorical variable with multiple categories is converted to sufficient indicator variables for inclusion in a model. Will those indicator variables be correlated to one another? CLearly explain

r. Lyte wishes to study speed of Reaction Time to press a button in response to the onset of a lamp.  The independent variable (IV) is the color of the light produced by the lamp (red, orange, yellow, green, or blue).  Since only 10 participants are available, she elects to administer the IV within-subjects with all 10 participants being exposed to all five levels of the color variable.  The order of the color of the light presentation is to be counterbalanced. Using concepts from the textbook, why would Dr. Lyte need to use counterbalancing in this scenario?

The following table was generated from the sample data of 10 junior high students regarding the average number of hours they are unsupervised per night, the average number of hours they play video games per night, and their final grades in their math class. The dependent variable is the final grade, the first independent variable (x1) is the number of hours unsupervised each night, and the second independent variable (x2) is the number of hours of video games each night. Coefficients Standard Error t-Stat p-value Intercept 62.711817 4.607133 13.611896 0.000010 Hours Unsupervised 0.635048 0.915495 0.693666 0.513836 Hours Playing Video Games 7.528738 1.296727 5.805955 0.001145 Copy Data Step 1 of 2: Write the multiple regression equation for the computer output given. Round your answers to three decimal places. Answer 田 Tables 国 Keypad How to enter your answer (opens in new window) Keyboard Shortcuts X +

For this activity, identify the independent (or quasi-independent) and dependent variables in the following examples. Also have identify the type of manipulation used for the independent variable and the scales of measurement for the dependent variable(s). Discuss each example and consider any confounding variables that may pose a problem for the study.  A researcher would like to know whether men and women experience jet lag differently. He surveys people traveling from San Francisco to New York to measure their feelings of sleepiness and disorientation upon arriving at their destination.

If observations are independent, that means that one observation has influenced another. True False

Explain in simple words the difference between the Causal and Correlated metric types.