Xy84.2 -73.131.3 85.836.7-21.131.819.528.617.2Find the correlation coefficient and round it to two decimal places.r =What percentage of the variation in y can be explained by the variation in the values of x? Round to onedecimal place.R² =

It is given that the data of two random variables X and Y of size 5 each.

Answered: Find the correlation coefficient and…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Suppose that the correlation between height and IQ in children is +0.70. What proportion (or percent) of the variability in IQ can be explained by the relationship with height? Select one: a. 44% b. 51% c. 70% d. 49%
c. Determine the coefficient of determination. (Round your answer to 4 decimal places.) d-1. Determine the correlation coefficient. (Round your answer to 4 decimal places.) e. If the dividend is $10, what is the predicted price per share? (Round your answer to 4 decimal places.)
Use the birth weights (grams) of 50 babies from the data set "Births." Use software or a calculator to find the mean and median. Examine the list of birth weights to make an observation about those numbers. How does that observation affect the way that the results should be rounded? Click the icon to view the birth weight data. - X The mean birth weight is Birth weights (grams) grams. (Round to one decimal place as needed.) 300 4900 4000 3600 3400 3000 3700 2900 3700 3100 3400 3500 4100 3200 2900 2800 3500 3100 3300 3800 3800 2300 3300 2600 2400 3400 3300 4000 2800 3600 3100 2800 2800 2500 2600 2700 2600 3000 2900 3600 300 3400 3500 3400 3600 3400 3200 2600 3600 3500
Find the mean. Round the answer to two decimal places.
Using the data in the photo. Find the correlation by hand. Round to three decimal places.
The following histogram shows the exam score for a pre algebra class use this histogram to answer the questions. Find the number of students that took this exam.
Teddy is the manager for the touring rock band Hi Phone. For the band's recently ended summer tour, Teddy kept track of the attendance of each of the band's concerts. The histogram below summarizes the data. Use the histogram to answer each of the questions. Frequency (Number of concerts) (a) One class is the most frequent. How many concerts are in this class? 10- 9. 8- (b) According to the histogram, what is the total number of concerts? 6- 5- (c) What is the class width? 50 to 174 175 to 299 300 to 424 425 to 549 550 to 674 Number of people who attended Explanation Check O 2021 McGraw-Hill Education, All Rights Reserved. Terms of Use| Privacy Accessibility étv W 6 The It esc # $ % @ 5 6 7 8 1 2 3 4 Q W E R tab K L S D F G A caps lock N M Z C V shift ention command
Find the percentile rank for each value in the data set. The data represent the values in billions of dollars of the damage of 6 hurricanes. Round to the nearest whole percentile. 2.3, 3.3, 6.2, 7.9, 9.6,11.3
A fitness instructor measured the heart rates of the participants in a yoga class at the conclusion of the class. The data is summarized in the histogram below. There were fifteen people who participated in the class between the ages of 25 and 45. 90 100 110 120 130 140 150 160 Beats per minute (bpm) What percent of the participants had a heart rate between 130 and 150 bpm? 4. 2. Frequency
Breast-feedingmothers secrete calcium into their milk. Some of thecalcium may come from their bones, so mothers maylose bone mineral. Researchers measured the percent changein mineral content of the spines of 47 mothers during threemonths of breast-feeding.6 Here are the data: -4.7 -2.5 -4.9 -2.7 -0.8 -5.3 -8.3 -2.1 -6.8 -4.32.2 -7.8 -3.1 -1.0 -6.5 -1.8 -5.2 -5.7 -7.0 -2.2-6.5 -1.0 -3.0 -3.6 -5.2 -2.0 -2.1 -5.6 -4.4 -3.3-4.0 -4.9 -4.7 -3.8 -5.9 -2.5 -0.3 -6.2 -6.8 1.70.3 -2.3 0.4 -5.3 0.2 -2.2 -5.1 (a) The researchers are willing to consider these 47women as an SRS from the population of all nursingmothers. Suppose that the percent change in this population has standard deviation 2.5%. Make a stemplotof the data to verify that the data follow a Normal distribution quite closely. (Don’t forget that you need botha 0 and a 0 stem because there are both positive andnegative values.) (b) Use a 99% confidence interval to estimate the meanpercent change in the population
A pediatrician wants to determine the relation that may exist between a child's height and head circumference. She randomly selects 8 children from her practice, measures their height and head circumference, and obtains the data shown in the table. Complete parts (a) through (e) below. Height (in.) Head Circumference (in.) O 27.25 17.5 25.25 16.9 Click here to see the Table of Critical Values for Correlation Coefficient. 26.5 17.3 25 17 28 17.6 26.25 17.2 Data Table 26.25 17.1 27.25 17.3 Critical Values for Correlation Coefficient n 3 0.997 4 0.950 0.878 0.811 7 0.754 8 0.707 0.666 10 0.632 11 0.602 12 0.576 13 0.553 14 0.532 15 0.514 16 0.497 17 0.482 18 0.468 19 0.456 20 0.444 21 0.433 22 0.423 23 0.413 24 0.404 25 0.396 26 0.388 27 0.381 28 0.374 29 0.367 30 0.361 ..... (1,1) More n
The accompanying table lists the ages of acting award winners matched by the years in which the awards were won. Construct a scatterplot, find the value of the linear correlation coefficient r, and find the P-value of r. Determine whether there is sufficient evidence to support a claim of linear correlation between the two variables. Should we expect that there would be a correlation? Use a significance level of a = 0.01. Click the icon to view the ages of the award winners. Construct a scatterplot. Choose the correct graph below. OA 70- 20- 20 70 Best Actress (years) B. 70- 20- 20 70 Best Actress (years) The linear correlation coefficient is r = (Round to three decimal places as needed.) 70- 20- 20 70 Best Actress (years) Q G D. 70- 20- 20 70 Best Actress (years)

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Find the correlation coefficient and round it to two decimal places. r = What percentage of the variation in y can be explained by the variation in the values of x? Round to one decimal place. R² = %