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
denis23 [38]
3 years ago
5

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 she asks her 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. What would be the appropriate set of hypotheses for testing if the professor's predictions were accurate?
Mathematics
1 answer:
solniwko [45]3 years ago
7 0

Answer:

See explanation below.

Step-by-step explanation:

We are going 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: P(student buys a hard copy) = 0.60 P(student prints book from the web) = 0.25, P(student reads book online) = 0.15

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.

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

You might be interested in
Please help! 3 Questions please show how you solved the problem
Masteriza [31]

Answer:

1)  (-y^2-4y-8+4y^2+6y-3)

2)  32x^5y^4z^2

3)  x^3-9x^2+14x+24

Step-by-step explanation:

Given the expression we have to simplify the expression

1)   (-y^2-4y-8)-(-4y^2-6y+3)

⇒ (-y^2-4y-8+4y^2+6y-3)

Combining like terms, we get

⇒ 3y^2+2y-11

2.)    (2x^2y^3z^2)(4xy.4x^2)

⇒ (2x^2y^3z^2)(16x^3y)

⇒ 32x^5y^4z^2

3.)   (x-4)(x^2-5x-6)

⇒ x^3-5x^2-6x-4x^2+20x+24

⇒ x^3-9x^2+14x+24

5 0
3 years ago
This figure shows the mer
Flura [38]

Answer:

8

Step-by-step explanation:

8•4=32 it's not that bad

5 0
3 years ago
Point m is located at 4,-2 what is located 2 units for point m
eimsori [14]

Answer:

None

Step-by-step explanation:

Given

m = (4,-2)

Required

Point 2 units from m

There are 4 possible points 2 units from m and they are:

m' = (4+2,-2) = (6,-2)

m" = (4,-2+2) = (4,0)

m'''= (4-2,-2) = (2,-2)

m'''' = (4,-2-2) = (4,-4)

From the graph, we have:

A = (4,2)

B = (-4,2)

C = (2,-3)

None of the points is 2 units from m

7 0
2 years ago
Rewrite in simplest terms:
tangare [24]

Answer:

If one −5s−7(8s−1): -61s+7

If two −5s−7(8s−1): -112s+14

Step-by-step explanation:

-5s-7(8s-1)

Multiply -7 onto 8s and -1:

-5s-56s+7

add -5s and -56s:

-61s+7

−5s−7(8s−1)−5s−7(8s−1)

Multiply both -7 to 8s and -1

-5s-56s+7-5s-56s+7

add:

-112s+14

6 0
3 years ago
mario earned three times as much money last year as his wife elena. the total amount that the two earned was 11,000. how much mo
JulsSmile [24]
That would mean Mario earns 33000
7 0
3 years ago
Other questions:
  • Complete a prime factorization of 54 and write it as a product of primes
    7·2 answers
  • The median number of baskets made by 7 players in a certain basketball game is 5. The range of the number of baskets made by tho
    6·2 answers
  • During his speech at the Creating Digital Dividends Conference in October 2000, Bill Gates said, "I’m a great believer that any
    15·1 answer
  • Suppose you travel 378 miles in 7 hours what is you average rate of speed
    6·1 answer
  • Which of the following equations shows direct variation between u and v? Choose all answers that are correct. A. v =1/u + 6 B. v
    5·1 answer
  • Jenny bought 2 hammers and a wrench for $47. Penny bought 1 hammer and 3 wrenches for $41. How much is 1 hammer and 2 wrenches?
    6·1 answer
  • The directions on a seed packet say to plant the seeds 178 inches apart. What is the decimal equivalent of this mixed number?
    8·1 answer
  • PLEASE HELP!!!!!!!!!!!!!!! 20 POINTS!!!!!!!!!!!!!!!!
    11·1 answer
  • BONUS BONUS BONUS<br> i will mark brainliest
    5·1 answer
  • Is this function in Slope-Intercept Form, Point Slope Form, or Standard Form?
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!