ers correlate? Here are data on the heights (1H IIICIC3) UI Brother 71 68 66 67 70 71 70 73 72 65 66 Sister 69 64 65 63 65 62 65 64 66 59 62 (a) Use your calculator or software to find the correlation and the equation of the least-squares line for predicting sister's height from brother's height. Make a scatterplot of the data and add the regression line to your plot. (b) Damien is 70 inches tall. Predict the height of his sister Tonya. Based on the scatterplot and the correlation r, do you expect your prediction to be very ac- curate? Why?

Using your favorite statistics software package, you generate a scatter plot which displays a linear form. You find a regression equation and the standard deviation for both variables. The standard deviation for x is 1.32, and the standard deviation for y is 4.28. The regression equation is reported as  y=−3.1 +1.97xy=-3.1 +1.97x  What fraction of the variation in y can be explained by the variation in the values of x? (Enter your answer as a decimal between 0 and 1.)

Practice with correlation coefficients Using the table that appears below each pair of variables, please state the direction and strength (using Cohen’s rules of thumb) of each correlation coefficient, r. Assume all coefficients are statistically significant at p < .05. Then, interpret the correlation. Please describe the pattern, conceptually, without using the word “correlated” in your description. 3. Self-focus, charitable donations: r = -.28Direction & strength: _________________________________________________Interpretation: ________________________________________________________Can you infer causality? Explain. _______________________________________ 4. Stress, physical symptoms: r = .44Direction & strength: ____________________________________________________Interpretation: ___________________________________________________________Can you infer causality? Explain. _________________________________________

For the following questions, THERE IS NO NEED FOR EXPLANATION. PLEASE PROVIDE JUST THE ANSWER THANK YOU. Please DO NOT waste time on writing things to explain. Please answer in 30 mintues or else I will write a bad review. If you follow my rules and answer in less than 30 mintues then I will write a very long and wonderful review about you. ANSWER the questions correlty and please answer all the questions with what it regards in saying exactly.

please answer in text form and in proper format answer with must explanation , calculation for each part and steps clearly

Please write clearly.   Thank you.

You will be comparing two sets of data for this assignment. 1. Determine the average number of toilet paper rolls* for Fall 2022 biochemistry and genetics students (individually) and calculate the standard deviation of each using the equation. Please be sure to show your work. I know that you can easily use tools like Microsoft Excel to calculate standard deviation, but I would like to see you complete the work by hand so that you get a sense of the role of each component of the equation. Ignore students that did not provide answers (don't use those students in the mean or N value calculations). 2. Please answer the following questions when you submit your data. Which group had a higher mean number of rolls of toilet paper? Which value had the most variability? Referring to the equation, how could you decrease the amount of variability in the mean? Did you find the variation surprising or unexpected?  The two sets of data and the standard deviation formula pictures are attached…

The mating call frequency of American bird-voiced tree frogs appears to be related to the outside temperature. The scatterplot below show this relationship. Summary measures are: mean of frequency = 6.01 notes per second, standard deviation of frequency = 1.78 notes per second, mean of temperature = 22.61 degrees Celsius, standard deviation of temperature = 3.35 degrees Celsius, and correlation between frequency and temperature = 0.85 Compute the slope what the slope means in this context. Compute the y-intercept and interpret what the y-intercept means in this context. Describe the relationship between Temperature and Frequency. Predict the frequency when temperature is 23 and 36 degrees. Do you see any problems with wither of the predictions?

While performing searches on the Internet to find accommodation, Jasmine realized that the cost of a housing unit seems to be related to the number of inhabitants of the municipality where the unit is located. She noted the following data. She represented the data in a scatter plot, where she drew a line of best fit passing through the mean point of the distribution. If Jasmine considers that a linear correlation exists between these two variables, what should be the mean monthly rent of a 4½-room unit in a municipality with a population of approximately 250 000? Justify your answer algebraically.

The two regression lines are having their means standard deviations 31.6, 38 and 3.72 and 6.31 andr = - •36 Find the two regression lines i n sail