« previous next »

Author Question: The scores on a midterm test in a college mathematics course were found to be normally distributed ... (Read 33 times)

cherise1989

  • Hero Member
  • *****
  • Posts: 555
on: Jul 25, 2018
The scores on a midterm test in a college mathematics course were found to be normally distributed with a mean of 78 and a standard deviation of 9.
 
  a. What percentage of students scored between 69 and 96?
  b. Find the range of scores that includes the middle 50 of all scores.

Question 2

Do you believe that grain yield is correlated with the amount of fertilizer applied? If so, will the correlation be positive or negative? Explain.
 
  What will be an ideal response?


aruss1303

  • Sr. Member
  • ****
  • Posts: 314
Reply #1 on: Jul 25, 2018
Answer to Question 1

a. 81.85
b. approximately 72 to 84

Answer to Question 2

yes; positive (within reason; if too much fertilizer is applied, the yields will decrease.)


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

cherise1989

  • Hero Member
  • *****
  • Posts: 555
Reply #2 on: Jul 25, 2018
Thank you!


aruss1303

  • Sr. Member
  • ****
  • Posts: 314
Reply #3 on: Jul 25, 2018
Always glad to help...


« previous next »
 

Did you know?

Though the United States has largely rejected the metric system, it is used for currency, as in 100 pennies = 1 dollar. Previously, the British currency system was used, with measurements such as 12 pence to the shilling, and 20 shillings to the pound.

Did you know?

The use of salicylates dates back 2,500 years to Hippocrates’s recommendation of willow bark (from which a salicylate is derived) as an aid to the pains of childbirth. However, overdosage of salicylates can harm body fluids, electrolytes, the CNS, the GI tract, the ears, the lungs, the blood, the liver, and the kidneys and cause coma or death.

Did you know?

The largest baby ever born weighed more than 23 pounds but died just 11 hours after his birth in 1879. The largest surviving baby was born in October 2009 in Sumatra, Indonesia, and weighed an astounding 19.2 pounds at birth.

Did you know?

Lower drug doses for elderly patients should be used first, with titrations of the dose as tolerated to prevent unwanted drug-related pharmacodynamic effects.

Did you know?

There are approximately 3 million unintended pregnancies in the United States each year.

The Red-bearded Bee-eater Nyctyornis amictus is a large species of bee-eater found in the Indo-Malay The Red-bearded Bee-eater Nyctyornis amictus is a large species of bee-eater found in the Indo-Malay
(a) The connection required to test a Halleffect sensor. (b) A typical waveform from a Hall-effect ... (a) The connection required to test a Halleffect sensor. (b) A typical waveform from a Hall-effect ...
A sampling of the modified and unusual bases found in tRNAs A sampling of the modified and unusual bases found in tRNAs
Wet Compression Test Wet Compression Test
Red Bull uses strategies that help it target college-aged, young-adult consumers Red Bull uses strategies that help it target college-aged, young-adult consumers
Morgan’s test-cross analysis of genetic linkage between autosomal genes Morgan’s test-cross analysis of genetic linkage between autosomal genes
Video: Non-polar compounds - insolubility

For a complete list of videos, visit our video library