This topic contains a solution. Click here to go to the answer

Author Question: Which of the following is not true regarding a concave function? a. It is bowl-shaped down. b. It ... (Read 201 times)

bobbysung

  • Hero Member
  • *****
  • Posts: 519
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
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.





 

Did you know?

The toxic levels for lithium carbonate are close to the therapeutic levels. Signs of toxicity include fine hand tremor, polyuria, mild thirst, nausea, general discomfort, diarrhea, vomiting, drowsiness, muscular weakness, lack of coordination, ataxia, giddiness, tinnitus, and blurred vision.

Did you know?

When blood is deoxygenated and flowing back to the heart through the veins, it is dark reddish-blue in color. Blood in the arteries that is oxygenated and flowing out to the body is bright red. Whereas arterial blood comes out in spurts, venous blood flows.

Did you know?

Every 10 seconds, a person in the United States goes to the emergency room complaining of head pain. About 1.2 million visits are for acute migraine attacks.

Did you know?

Tobacco depletes the body of vitamins A, C, and E, which can result in any of the following: dry hair, dry skin, dry eyes, poor growth, night blindness, abscesses, insomnia, fatigue, reproductive system problems, sinusitis, pneumonia, frequent respiratory problems, skin disorders, weight loss, rickets, osteomalacia, nervousness, muscle spasms, leg cramps, extremity numbness, bone malformations, decayed teeth, difficulty in walking, irritability, restlessness, profuse sweating, increased uric acid (gout), joint damage, damaged red blood cells, destruction of nerves, infertility, miscarriage, and many types of cancer.

Did you know?

Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.

For a complete list of videos, visit our video library