Mathematics, 30.04.2021 19:00 Naviascales1681

Applicants for a particular job, which involves extensive travel in Spanish speaking countries, must take a proficiency test in Spanish. The sample data below were obtained in a study of the relationship between the numbers of years applicants have studied Spanish and their score on the test. Number of years (x) 3 4 4 2 5 3 4 5 3 2.
Score (y) 57 78 72 58 89 63 73 84 75 48

Required:
a. What is the correlation coefficient r2?
b. At the 5% level of significance, do the data provide sufficient evidence to conclude that the slope of the population regression line is not zero and hence that the number of years of study is useful as a predictor of score on the test?
c. Does the data provide sufficient evidence to conclude that the number of years of study and test score are linearly positively correlated?

Answers: 1

Show answers

Another question on Mathematics

Mathematics, 21.06.2019 14:00

Demonstrate the proof of your new polynomial identity through an algebraic proof and a numerical proof in an engaging way! make it so the whole world wants to purchase your polynomial identity and can't imagine living without it! you must: label and display your new polynomial identity prove that it is true through an algebraic proof, identifying each step demonstrate that your polynomial identity works on numerical relationships create your own using the columns below. see what happens when different binomials or trinomials are combined. square one factor from column a and add it to one factor from column b to develop your own identity. column a column b (x − y) (x2 + 2xy + y2) (x + y) (x2 − 2xy + y2) (y + x) (ax + b) (y − x) (cy + d)

Answers: 3

Answer

Mathematics, 21.06.2019 15:30

Neveah and clint are baking muffins for the bake sale. they need to bake 30 muffins for their display case. clint has baked 4 so far, and neveah has baked 7. how many muffins (m) do they have left to bake? show your work!

Answers: 1

Answer

Mathematics, 21.06.2019 18:20

Alana has 12.5 cups of flour with which she is baking four loaves of raisin bread and one large pretzel. the pretzel requires 2.5 cups of flour to make. how much flour is in each loaf of raisin bread? explain the steps to follow to get the answer.

Answers: 3

Answer

Mathematics, 21.06.2019 18:30

Create a data set with 8 points in it that has a mean of approximately 10 and a standard deviation of approximately 1.

Answers: 1

Answer

You know the right answer?

Applicants for a particular job, which involves extensive travel in Spanish speaking countries, must...

Questions