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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

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emmasim [6.3K]
   
\displaystyle  \\ 
\alpha + \beta = 90^o \\ 
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\texttt{----------- } +  \\ 
2\alpha ~~/~= 94^o \\  \\ 
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8 0
3 years ago
The product of two positive integer numbers is 30 and the sum of the same two numbers is 11. Find the
vampirchik [111]

Answer:

5 and 6

Step-by-step explanation:

call them a and b, respectively

we have a*b=30 -> a=30/b

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3 0
3 years ago
Does anyone know this answer​
4vir4ik [10]

0 is the answer of questions

5 0
3 years ago
Solve the following equations enter x-coordinate of the solution round to the nearest tenth
zalisa [80]
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3 years ago
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Lerok [7]

Answer:

y = 10

Step-by-step explanation:

Given the 2 equations

y = - 2x + 4 → (1)

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Since both equations express y in terms of x we can equate them

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6 0
2 years ago
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