SocialTwist Tell-a-Friend

Ask a Question? Get an Answer!


Question: The relation between the sign of the correlation coefficient(r) and the sign of the slope(b) of the regression line is


A ) when r is positive, b is also positive and when r is negative, b is also negative
B ) when r is positive, b is negative and when r is negative, b is positive
C ) when r is positive or negative, b is positive
D ) when r is positive or negative, b is negative

Steps to derive

1 The correlation between the sign of the correlation coefficient and the sign of the slope of the regression line is such that, when r is positive, b is also positive, when r is negative, b is also negative.

2 Therefore, if r is positive, b is positive and if r is negative, b is negative.



Hence the right answer is Option A

Click Here To Go Back


Few Other Questions -

  • The university authorities wanted to predict a student's grade on a statistics midterm sco..
  • Which of the following is equivalent to 3.5%?..
  • Which of the following is equivalent to 45%?..
  • A chair manufacturing company has experienced the following costs for the first half of th..
  • Which of the following is equivalent to 14?..
  • Which of the following is not equivalent to 38?..
  • A group of 10 students attended a class to improve their reading speed. The average readin..
  • Which of the following is equivalent to 6.6?..
  • The yearly investments made by a business man and the profits earned by him are listed her..
  • The table shows the number of pets sold at Williams′s pet shop in the past four year..
  • A central office operator has observed that the long distance telephone calls are normally..
  • The table shows the number of people who attended a carnival during the years 1999-2002. Y..
  • Simplify:3(m + 4n) + 3(2m + n)..
  • The manager of the local branch of a savings bank has determined that 30% of all depositor..
  • The ACT Mathematics and Statistics scores for 7 students are shown. Determine the correlat..
  • The age and height of a person is recorded. Determine the equation of the regression line...
  • A teacher wishes to know whether there is any relationship between the hours of study and ..
  • Find the regression line for the following data and predict for y′ when x = 40.x1248..
  • Determine the equation of the regression line for the following data given.n = 50, ∑..
  • The number of items produced per month and the total costs incurred by a company is shown...
  • State which of the following statement(s) is/are true.I. Regression analysis is a measure ..
  • The table shows the favorite activities of 200 students. What type of graph would be most ..
  • Identify the graph that is most appropriate to represent a data that denotes the amount of..
  • Which graph would be most appropriate to show the time in number of minutes that 25 employ..
  • A survey was conducted on the length of the names of the students in a class. What type of..
  • For 10 observations on price(in 1,000$) and supply(tonnes) of an item, the following data ..
  • The table shows the kinds of pets the students have in a class. What type of graph would b..
  • If a company wants to attain a sales target of $100,000, then what should be the advertisi..
  • 25 pairs of x and y values gave the following results.∑x = 127, ∑y = 100, &#..
  • Which scatter plot shows no relationship between the test scores of Samuel and the tempera..
  • Which of the following statement(s) is/are true? I. z test is used for testing two means a..
  • The table shows the height and foot length of students in a class. Select the appropriate ..
  • Sarah wanted to know the favorite color of her classmates. She asked them if they like red..
  • Which of the following is/are the characteristics of F distribution? I. It is negatively s..
  • Whom should Katrina survey, if she wants to know the most popular hero in the city?..
  • Which of the following is/are true? I. The mean value of F is approximately zero. II. F di..
  • The basic assumption(s) for estimating the difference between two variances is/are: I. The..
  • Jennifer wants to know the favorite pet of her classmates. Which of these is a fair questi..
  • Select the incorrect statement(s).I. A sampling distribution of sample means is a distribu..
  • Which scatter plot shows the positive relationship between the weight and the number of se..
  • A teacher claims that the variance of the final examination scores in her class is larger ..
  • Ms. Monica′s class wants to know if more families bake cakes at home. Whom should th..
  • As the sample size n increases without limit, the shape of the distribution of the sample ..
  • Mr.Albert wants to know the favorite way to eat potatoes, of his students. Which of these ..
  • A manufacturer claims that the variance of defective detergent packets in cartons produced..
  • A statistician wishes to see whether the variance of the number of passengers traveling fr..
  • What formula is used to gain information about a sample mean when the variable is normally..
  • The data provided shows the number of people leaving two different companies in a year. Fi..
  • A researcher claims that the variance of temperatures recorded at different locations of 2..
  • Both the bar graph and the line graph show the eye color of Mrs. Martin′s class. Whi..
  • Find the F-test value and the critical value at 95% confidence for testing the population ..
  • If the degrees of freedom of the numerator is 15 and that of the denominator is 24 for tes..
  • The variance of the measures of rainfall in 20 different cities of two different states ar..
  • A Math professor claims that the variance of the number of students attending his guest le..
  • A researcher claims that the variance of the distances traveled by the buses of Indiana in..
  • Find the F-test value for testing the variances of two populations. The sample variances f..
  • The variance of the number of students absent in a day of a particular grade in public sch..
  • The variance corresponding to the number of fruits sold by two fruit vendors in 16 and 13 ..
  • Find the F-test value for testing the difference between two population variances. The da..
  • The number of best friends for a sample of 10 students in third and in seventh grade are s..
  • The standard deviation of the amount of car sales for 6 years in state 1 is 1.14 and for s..
  • The variance of the number of pages of a sample of 20 women's fitness magazines is 62 and ..
  • The variances corresponding to the number of students having attendence of 95% or above of..
  • The data shows the deaths related to bad weather over 6 years. Find the F-test value and v..
  • The standard deviation of the scores of 20 students in statistics test is 10 and that of c..
  • The mean costs of two sets of soaps of same weight are $4.30 and $4. If the sets were 40 a..
  • The mean number of males and females in 40 classrooms of a school are 25 and 22 with the s..
  • The data given is obtained from random samples of two different populations:Give the two c..
  • The number of candles placed on two tables A and B at 25 instants of time is shown. Give t..
  • The mean number of balls moved from box A to box B and from box C to box D in 20 and 25 mo..
  • Which of the following sets is arranged from least to greatest?..
  • The mean number of rooms of 100 hotels of town A and 150 hotels of town B are 60 and 50 wi..
  • The data corresponding to the number of left handed people of 20 offices of two cities is ..
  • The average number of physically handicapped people in 25 sections of 2 colleges are 6 and..
  • The principal of a school found the mean age of 40 students of one class as 16.50 and that..
  • A test of memory was conducted on two people. They were asked to recollect the items they ..
  • A person verified the records of past 20 years of one estate and that of past 18 years of ..
  • The dealer of a car model made a survey to prove that the mean number of cars he sold this..
  • The average number of pens sold by a shopkeeper in the first half and second half of a mon..
  • On an average it was found that 110 out of 400 students of one school and 100 out of 500 ..
  • Complete. 13 = ?6..
  • Choose the missing denominator in the equivalent fractions 34 = 9?..
  • Choose the missing numerator in the equivalent fractions.?3 = 812 ...
  • Choose fractions equivalent to 2024. ABCD5/640/4810/18200/240..
  • Find the fraction equivalent to 35...
  • Hi, I am a 5-digit number. When you round me to the nearest ten thousand, you get 30,000. ..
  • The number of people in a football stadium is 132,004. What is this number rounded to the ..
  • The population of a city in the year 2004 was 38,746. Which of these numbers represents th..
  • A computer manufacturing company made a profit of $4,740,200 last year. Round it to the ne..
  • Victor deposited $38,450 into his account. What is the amount in his account rounded to th..
  • Diana bought a bracelet for $3.75 and a finger ring for $8.15. Estimate the total amount..
  • Estimate the sum of 68.32 and 5.81...
  • A shirt costs $68.75. Donald has only $45.23 with him. Estimate the balance he needs to b..
  • Estimate the difference between 15.16 and 8.25...
  • Estimate the sum of 24.32 and 7.9..
  • Fill in the blank with the appropriate comparison symbol.0.2 ____ 0.02..
  • Compare:0.37  0.34..
  • The heights of four boys in a class are 4.3 ft, 4.4 ft, 4.5 ft, and 4.2 ft. Arrange their..
  • Arrange these decimal numbers in order from least to greatest. 0.34, 0.47, 0.21, 0.58..
  • Which number line reads the fraction 15?..
    		•