Mathematics, 23.11.2020 14:00 kellymcdow9385

A group of students measure the length and width of a random sample of beans. They are interested in investigating the relationship between the length and width. Their summary statistics are displayed in the table below. All units, if applicable, are millimeters. Mean width: 7.533
Stdev width: 0.905
Mean height: 13.433
Stdev height: 1.727
Correlation coefficient: 0.8429

a) The students are interested in using the width of the beans to predict the height. Calculate the slope of the regression equation.

b) Write the equation of the best-fit line that can be used to predict bean heights. Use x to represent width and y to represent height.

c) What fraction of the variability in bean heights can be explained by the linear model of bean height vs width? Express your answer as a decimal.

d) If, instead, the students are interested in using the height of the beans to predict the width, calculate the slope of this new regression equation.

e) Write the equation of the best-fit line that can be used to predict bean widths. Use x to represent height and y to represent width.

Answers: 3

Show answers

Another question on Mathematics

Mathematics, 21.06.2019 16:40

Which is the graph of f(x) = (4)x? image for option 1 image for option 2 image for option 3 image for option 4

Answers: 1

Answer

Mathematics, 21.06.2019 23:00

The height of a birch tree, f(x), in inches, after x months is shown in the graph below. how much does the birch tree grow per month, and what will be the height of the birch tree after 10 months? a. the birch tree grows 1 inch per month. the height of the birch tree will be 16 inches after 10 months. b. the birch tree grows 2 inches per month. the height of the birch tree will be 26 inches after 10 months. c. the birch tree grows 3 inches per month. the height of the birch tree will be 36 inches after 10 months. d. the birch tree grows 2 inches per month. the height of the birch tree will be 24 inches after 10 months.

Answers: 1

Answer

Mathematics, 22.06.2019 00:00

(20 points) a bank has been receiving complaints from real estate agents that their customers have been waiting too long for mortgage confirmations. the bank prides itself on its mortgage application process and decides to investigate the claims. the bank manager takes a random sample of 20 customers whose mortgage applications have been processed in the last 6 months and finds the following wait times (in days): 5, 7, 22, 4, 12, 9, 9, 14, 3, 6, 5, 15, 10, 17, 12, 10, 9, 4, 10, 13 assume that the random variable x measures the number of days a customer waits for mortgage processing at this bank, and assume that x is normally distributed. 2a. find the sample mean of this data (x ě…). 2b. find the sample variance of x. find the variance of x ě…. for (c), (d), and (e), use the appropriate t-distribution 2c. find the 90% confidence interval for the population mean (îľ). 2d. test the hypothesis that îľ is equal to 7 at the 95% confidence level. (should you do a one-tailed or two-tailed test here? ) 2e. what is the approximate p-value of this hypothesis?

Answers: 2

Answer

Mathematics, 22.06.2019 00:30

What is the geometric mean of 3 and 7? a) square root of 21 b) 2 square root of 6 c) 2 square root of 7 d) 21

Answers: 2

Answer

You know the right answer?

A group of students measure the length and width of a random sample of beans. They are interested in...

Questions

Mathematics, 17.12.2019 09:31

If ab = ac, which statement is false?...