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
Help me on number 12 13 14 and 15
aleksandr82 [10.1K]

12. 1.625 [terminating]; 13. 0.83 [bar notation over 3 (repeating)]; 14. 900 cm = 9 m; 15. 0.23 cm = 2.3 mm

Repeating decimals are parts of decimals that have repetitive digits; terminating decimals are decimals whose digits end.

Whether you are using Metric or Imperial, you have to determine whether you are going from a small unit to a big unit or vice versa. Then perform your operation. So, in exercise 14, the smaller unit is centimeters, so you would be going from big to small. Exercise 15 has you going from small to big.

There are centimeters in one meter, so multiply 9 by to get 900 centimeters.

There are 10 millimeters in one centimeter, so divide 2.3 by 10 simply by moving the decimal point ONCE to the left [Power of 10].

small to BIG → Division

BIG to small → Multiplication

I am joyous to assist you anytime.

5 0
3 years ago
You invested $11,000 in two accounts paying 3% and 7% annual interest, respectively. If the total interest earned for the year w
Trava [24]

Answer:

I invested $ 10,000 at 7% per year, and $ 1,000 at 3% per year.

Step-by-step explanation:

Given that I invested $ 11,000 in two accounts paying 3% and 7% annual interest, respectively, if the total interest earned for the year was $ 730, to determine how much was invested at each rate, the following calculation must be performed:

5,000 x 0.07 + 6,000 x 0.03 = 530

8,000 x 0.07 + 3,000 x 0.03 = 650

10,000 x 0.07 + 1,000 x 0.03 = 730

Therefore, I invested $ 10,000 at 7% per year, and $ 1,000 at 3% per year.

6 0
3 years ago
Read 2 more answers
. A patio is built in the shape of a trapezoid, as shown. Determine the area of the patio.
netineya [11]

Answer:

84 in²

Step-by-step explanation:

(15+6)0.5 * 8 = 21(0.5) * 8 = 10.5 * 8 = 84

8 0
3 years ago
You share a coin collection with a friend. You possess 44 of the coins and
vfiekz [6]

Answer:

Step-by-step explanation:

6 0
3 years ago
Is -2-x the same as -2x?
garik1379 [7]

Answer:

yes

Step-by-step explanation:

the variable cannot have a negative symbol, unless it has no number.

4 0
3 years ago
Other questions:
  • Polygon ABCD will be dilated by a scale factor of 2.2 with the origin as the center of dilation, resulting in the image A'B'C'D'
    13·2 answers
  • Which of the following is(are) the solution(s( to |5x+2|=8?
    13·2 answers
  • What is 8/10 x 8/21
    12·2 answers
  • What is the equation of the horizontal line through (-4,6)(−4,6)left parenthesis, minus, 4, comma, 6, right parenthesis?
    9·2 answers
  • Gracie is making 2 and 1/2 batches of chocolate chip cookies for her school bake sale. If one batch of cookies requires 1 and 1/
    11·1 answer
  • 17-21 can someone plz help me with those I need help and show work bc I don’t understand this plzzzz and thank you
    9·1 answer
  • Lori bought 300 grams of cayenne pepper and 5 kilograms of black pepper. how many grams of pepper did she buy in all? complete e
    13·1 answer
  • Due in 3 mins please help!!!
    6·1 answer
  • Find the coordinates of the orthocenter of a triangle with vertices at each set of points on a coordinate plane. a. ​(0,0), ​(16
    11·1 answer
  • Use Pythagorean theorem to find right triangle side lengths 8 and 10
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!