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
TEA [102]
3 years ago
10

A statistics instructor who teaches a lecture section of 160 students wants to determine whether students have more difficulty w

ith one-tailed hypothesis tests or with two-tailed hypothesis tests. On the next exam, 80 of the students, chosen at random, get a version of the exam with a 10-point question that requires a one-tailed test. The other 80 students get a question that is identical except that it requires a two-tailed test. The one-tailed students average 7.81 points, and their standard deviation is 1.06 points. The two-tailed students average 7.64 points, and their standard deviation is 1.33 points.
Mathematics
1 answer:
Leona [35]3 years ago
3 0

Answer:

There is no evidence that there is no significant difference between the sample means

Step-by-step explanation:

given that a  statistics instructor who teaches a lecture section of 160 students wants to determine whether students have more difficulty with one-tailed hypothesis tests or with two-tailed hypothesis tests. On the next exam, 80 of the students, chosen at random, get a version of the exam with a 10-point question that requires a one-tailed test. The other 80 students get a question that is identical except that it requires a two-tailed test. The one-tailed students average 7.81 points, and their standard deviation is 1.06 points

The two-tailed students average 7.64 points, and their standard deviation is 1.33 points.

Group   One tailed X     Two tailed Y  

Mean 7.8100 7.6400

SD 1.0600 1.3300

SEM 0.1185 0.1487

N 80       80  

H_0:\bar x=\bar y\\H_a: \bar x \neq \bar y

(Two tailed test)

The mean of One tailed X minus Two tailed Y equals 0.1700

t = 0.8940

 df = 158

p value =0.3727

 p is greater than alpha 0.05

There is no evidence that there is no significant difference between the sample means

You might be interested in
3x^2+48=0, solve the equation
MAXImum [283]

Answer:

16 + x2 = 0     (16)

I THINK

Step-by-step explanation: Simplifying

3x2 + 48 = 0

Reorder the terms:

48 + 3x2 = 0

Solving

48 + 3x2 = 0

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-48' to each side of the equation.

48 + -48 + 3x2 = 0 + -48

Combine like terms: 48 + -48 = 0

0 + 3x2 = 0 + -48

3x2 = 0 + -48

Combine like terms: 0 + -48 = -48

3x2 = -48

Divide each side by '3'.

x2 = -16

Simplifying

x2 = -16

Reorder the terms:

16 + x2 = -16 + 16

Combine like terms: -16 + 16 = 0

16 + x2 = 0

The solution to this equation could not be determined.

8 0
3 years ago
Your the best if you could help
Andre45 [30]

Answer:

see below

Step-by-step explanation:

1. a = 18, 2. n = -19, 3. x = -17, 4. v = -6, 5. a = 9, 6. x = -2, 7. k = -4,  8. m = -19

9. n = 3, 10.  a = -7, 11. n = -5, 12. n = -6, 13. x = -1/3, 14. m = 2/3 15. m = -9.8

16. n = 7.9, 17. x = 0, 18. b = 2, 19. v = -8, 20. b = -4, 21. n = 3, 22. p = 3.3

4 0
3 years ago
Which measurements could NOTrepresent the side lengths of a right triangle?
Volgvan

Answer:

D

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
A right triangle has one 64degree angle and one 90 degree angle
melamori03 [73]

Answer:

I dont know what your asking, for the other angle? Ig so. Answer: THE OTHER ANGLE IS 26. :)

Step-by-step explanation:

64 + 90 = 154.

All triangles add up to 180 degrees.

180-154 = 26.

7 0
3 years ago
HELPPPPPPPPPPPPPPPPPPPPPPPPPPPPP
andrew11 [14]
Ummm not to freak you out but what’s that in the background?
3 0
3 years ago
Other questions:
  • Jerry is 6 years older than his brother drew the sum of their ages is 30 how old are they
    15·1 answer
  • Evaluate the following expression: 2(1,1) -4(0,1). enter your answer as a vector.
    7·2 answers
  • Write 0.96 as a fraction in simplest form.<br> 0.96 =
    12·2 answers
  • What is the solution set in the open sentence with the given replacement set?
    7·1 answer
  • A) What is
    11·1 answer
  • What is the surface area of the square pyramid below?
    7·1 answer
  • An isosceles triangle has an angle that measures 26°. Which other angles could be in that
    14·1 answer
  • Can someone help please this is due soon ​
    5·1 answer
  • What is the value of h?<br> h = 20<br> h = 35<br><br> h = 55<br> h = 70<br> (2h)<br> (2h)º<br> 40 º
    15·1 answer
  • Jess is trying to save $100. She saves money each week. The first week she saves
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!