1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Korvikt [17]
3 years ago
12

A professor using an open source introductory statistics book predicts that 60% of the students will purchase a hard copy of the

book, 25% will print it out from the web, and 15% will read it online. At the end of the semester he asks his students to complete a survey where they indicate what format of the book they used. Of the 126 students, 71 said they bought a hard copy of the book, 30 said they printed it out from the web, and 25 said they read it online. State the hypotheses for testing if the professor’s predictions were inaccurate.
Mathematics
1 answer:
amid [387]3 years ago
5 0

Answer:

See explanation below

Step-by-step explanation:

We need to define the null hypothesis and the alternative hypothesis.

The null hypothesis is the hypothesis that states that the population results are actually what they claimed to be.

So, in this case, the null hypothesis (H₀) would be:<u> P(student buys a hard copy) = 0.60 P(student prints book from the web) = 0.25, P(student reads book online) = 0.15</u>

The alternate hypothesis states that the results were not the expected ones, in this case, any alternate hypothesis with different probabilities of any of the three cases will do.

<u>Hₐ= The percentages of students for any of the three cases is different (either greater or lower)</u>

You might be interested in
What is 90 is exponential form?<br> 2^__ * 3^__ * 5^__
Sloan [31]
90/2=45
45/3=15
15/3=5


90=2*3*3*5=2¹*3²*5¹
3 0
3 years ago
M(x)=1/x f(x)=2x-10 find the domain restriction of m(R(x))
AlexFokin [52]

Answer:

  • x ≠ 5

Step-by-step explanation:

<u>Given</u>

  • m(x) = 1/x
  • f(x) = 2x - 10

<u>Composite function</u>

  • m(f(x)) = 1/ (2x - 10)

<u>The denominator can't be zero</u>

  • 2x - 10 ≠ 0
  • 2x ≠ 10
  • x ≠ 5

5 0
3 years ago
Evaluate the expression when a= 7 and b= 6.<br> 4a + b
soldier1979 [14.2K]

Answer: 34

Step-by-step explanation: 4(7)+6

28+6 = 34

8 0
3 years ago
Read 2 more answers
Help me please. need quickly. What is the value of Z
larisa86 [58]

Answer:

z = 6

Step-by-step explanation:

8z-36=2z\\6z-36=0\\6z=36\\z=6

8 0
2 years ago
If -2 is a root of the quadratic equation x²-5x+c find the value of c
Tcecarenko [31]

Answer:

Step-by-step explanation:

P(x)= x^2-5x+c=0

P (-2)= (-2)^2-5 (-2)+c=0

= 4+10+c=0

=14+c=0

C=(-14)

3 0
3 years ago
Read 2 more answers
Other questions:
  • All machinery must be equipped with
    9·2 answers
  • Show work 9-17 please do
    6·1 answer
  • ASAP! GIVING BRAINLIEST! Please read the question THEN answer correctly! No guessing. Show your work or give an explaination.
    14·1 answer
  • What is the answer for (-6)(-3) can you you please walk me through it then answer. I think it’s 2 -2 -18 or 18 please help me!
    6·2 answers
  • Mr. Henderson’s annual premium of $4,668 is covered entirely by his employer along with 25% of the $9,264 premium for his wife a
    11·2 answers
  • Which of the following is the equation of a circle whose center is at the origin and whose radius is 4?
    10·2 answers
  • Write an inequality to show how much more needs to be saved to reach $100?
    10·2 answers
  • During the month of October, a YoYo Yogurt Shop sold $5,000 worth of yogurt. The previous month, the same shop sold $8,000 worth
    12·2 answers
  • Can anyone help me??
    14·1 answer
  • 5/6 divided by [13/11]
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!