the max weights (in kilograms) for which one repetition of a half squat can be performed and the jump heights (in centimeters) for 12 soccer players are given in the accompanying table. r=0.780 at a=0.05, is there enough evidence to conclude that there is a significance linear correlation between the variables?

max weight  X        190  185  155   180  175  170  150   160  160  180  190  210        

jump height  Y       61   56  54  59  56  63  52  51  49  56  60  64

Determine the null and alternative hypotheses

Determine the critical value(s)

determine the standard test statistic

t=
in Statistics Answers by

Your answer

Your name to display (optional):
Privacy: Your email address will only be used for sending these notifications.
Anti-spam verification:
To avoid this verification in future, please log in or register.

2 Answers

There are 12 pairs of results, so there are 12-2=10 degrees of freedom. Using a=0.05 we see from the critical values table that the critical value of r is 0.576, but, since r=0.780, which is bigger than the critical value, there appears to be a correlation, and so the null hypothesis (that the results are due to chance) isn't valid (with a 95% chance of being correct about this). Therefore there appears to be a significant relationship to body weight and jump height (the alternative hypothesis).

Using the formula t=rsqrt((n-2)/(1-r^2))=0.780sqrt(10/(1-0.6084))=0.780sqrt(10/0.3916)=3.94. This value is higher than the 2.23 value in the t-test values table for a=0.05 and 10 degrees of freedom, so reinforces the hypothesis that there is a significant relationship between body weight and jump height.

 

by Top Rated User (1.1m points)
H0:there is significant linear corelations btw the variables

H1;there is NO significant linear corelation btw the variables
by Level 2 User (1.5k points)

Related questions

1 answer
asked Jul 10, 2022 in Statistics Answers by anonymous | 198 views
1 answer
asked Oct 8, 2021 in Statistics Answers by Noor Level 1 User (120 points) | 238 views
1 answer
asked Oct 6, 2021 in Statistics Answers by anonymous | 268 views
1 answer
1 answer
1 answer
2 answers
1 answer
1 answer
asked Aug 17, 2020 in Statistics Answers by anonymous | 821 views
Welcome to MathHomeworkAnswers.org, where students, teachers and math enthusiasts can ask and answer any math question. Get help and answers to any math problem including algebra, trigonometry, geometry, calculus, trigonometry, fractions, solving expression, simplifying expressions and more. Get answers to math questions. Help is always 100% free!

Most popular tags

algebra problems solving equations word problems calculating percentages math problem geometry problems calculus problems math fraction problems trigonometry problems rounding numbers simplifying expressions solve for x order of operations probability algebra pre algebra problems word problem evaluate the expression slope intercept form statistics problems factoring polynomials solving inequalities 6th grade math how to find y intercept equation of a line sequences and series algebra 2 problems logarithmic equations solving systems of equations by substitution dividing fractions greatest common factor square roots geometric shapes graphing linear equations long division solving systems of equations least to greatest dividing decimals substitution method proving trigonometric identities least common multiple factoring polynomials ratio and proportion trig identity precalculus problems standard form of an equation solving equations with fractions http: mathhomeworkanswers.org ask# function of x calculus slope of a line through 2 points algebraic expressions solving equations with variables on both sides college algebra domain of a function solving systems of equations by elimination differential equation algebra word problems distributive property solving quadratic equations perimeter of a rectangle trinomial factoring factors of a number fraction word problems slope of a line limit of a function greater than or less than geometry division fractions how to find x intercept differentiation exponents 8th grade math simplifying fractions geometry 10th grade equivalent fractions inverse function area of a triangle elimination method story problems standard deviation integral ratios simplify systems of equations containing three variables width of a rectangle percentages area of a circle circumference of a circle place value solving triangles parallel lines mathematical proofs solving linear equations 5th grade math mixed numbers to improper fractions scientific notation problems quadratic functions number of sides of a polygon length of a rectangle statistics zeros of a function prime factorization percents algebra 1 evaluating functions derivative of a function equation area of a rectangle lowest common denominator solving systems of equations by graphing integers algebra 2 diameter of a circle dividing polynomials vertex of a parabola calculus problem perpendicular lines combining like terms complex numbers geometry word problems converting fractions to decimals finding the nth term range of a function 4th grade math greatest to least ordered pairs functions radius of a circle least common denominator slope unit conversion solve for y calculators solving radical equations calculate distance between two points area word problems equation of a tangent line multiplying fractions chemistry binomial expansion place values absolute value round to the nearest tenth common denominator sets set builder notation please help me to answer this step by step significant figures simplifying radicals arithmetic sequences median age problem trigonometry graphing derivatives number patterns adding fractions radicals midpoint of a line roots of polynomials product of two consecutive numbers limits decimals compound interest please help pre-algebra problems divisibility rules graphing functions subtracting fractions angles numbers discrete mathematics volume of a cylinder simultaneous equations integration probability of an event comparing decimals factor by grouping vectors percentage expanded forms rational irrational numbers improper fractions to mixed numbers algebra1 matrices logarithms how to complete the square mean statistics problem analytic geometry geometry problem rounding decimals 5th grade math problems solving equations with variables solving quadratic equations by completing the square simplifying trigonometric equation using identities
87,441 questions
99,039 answers
2,422 comments
16,939 users