This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: Which of the following is not true regarding a concave function? a. It is bowl-shaped down. b. It ... (Read 204 times)

bobbysung

  • Hero Member
  • *****
  • Posts: 519
on: Jun 24, 2018
Which of the following is not true regarding a concave function?
 a. It is bowl-shaped down.
  b. It is relatively easy to maximize.
  c. It has multiple local maxima.
  d. It has a single global maximum.

Question 2

The makers of Compute-All know that in the past, 40 of their sales were from people under 30 years old, 45 of their sales were from people who are between 30 and 50 years old, and 15 of their sales were from people who are over 50 years old. A random sample of 300 customers was taken to see if the market shares had changed. In the sample, 100 of the people were under 30 years old, 150 people were between 30 and 50 years old, and 50 people were over 50 years old.
 a. State the null and alternative hypotheses to be tested.
  b. Compute the test statistic.
  c. The null hypothesis is to be tested at the 1 level of significance. Determine the critical value from the table.
  d. What do you conclude?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

jgranad15

  • Sr. Member
  • ****
  • Posts: 345
Reply #1 on: Jun 24, 2018
Answer to Question 1

C

Answer to Question 2

a. H0: p1 = .4, p2 = .45, and p3 = .15
Ha: The population proportions are not p1 = .4, p2 = .45, and p3 = .15
b. 5.55
c. 9.21034
d. Do not reject the null hypothesis. There is not enough evidence to conclude that the market share has changed.


bobbysung

  • Hero Member
  • *****
  • Posts: 519
Reply #2 on: Jun 24, 2018
Thank you :)


jgranad15

  • Sr. Member
  • ****
  • Posts: 345
Reply #3 on: Jun 24, 2018
Happy to help you


« previous next »
 

Did you know?

Historic treatments for rheumatoid arthritis have included gold salts, acupuncture, a diet consisting of apples or rhubarb, nutmeg, nettles, bee venom, bracelets made of copper, prayer, rest, tooth extractions, fasting, honey, vitamins, insulin, snow collected on Christmas, magnets, and electric convulsion therapy.

Did you know?

Fewer than 10% of babies are born on their exact due dates, 50% are born within 1 week of the due date, and 90% are born within 2 weeks of the date.

Did you know?

People who have myopia, or nearsightedness, are not able to see objects at a distance but only up close. It occurs when the cornea is either curved too steeply, the eye is too long, or both. This condition is progressive and worsens with time. More than 100 million people in the United States are nearsighted, but only 20% of those are born with the condition. Diet, eye exercise, drug therapy, and corrective lenses can all help manage nearsightedness.

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?

More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.

Examples of structures in which extensive surface area is important for function. Examples of structures in which extensive surface area is important for function.
endocrine function of the kidneys endocrine function of the kidneys
How B Vitamins Function as Coenzymes (d) How B Vitamins Function as Coenzymes (d)
Write equation for each function Write equation for each function
List transformations and Create a table of values for the following log function: List transformations and Create a table of values for the following log function:
General Mathematics - Finding the Range of a Function General Mathematics - Finding the Range of a Function
Video: SNP Polymorphysim Microarray Chip - How to Test a Person's DNA

For a complete list of videos, visit our video library