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
balandron [24]
3 years ago
15

Chris has been hired to assess a new version of a college entrance exam. He randomly assigns 100 high school juniors to take the

new exam and 100 high school juniors to take the old exam. So that the participants were unaware of the two versions, the new exam was administered in the school gym while the old exam was administered in the school auditorium. The students taking the exam in the gym complained about the smell, the temperature and the uncomfortable seats. The students taking the exam in the auditorium made no complaints. Chris calculated a statistically significant difference between the two versions of the exam (t(198)= 3.1, p< 0.005) and concluded that the new exam was not a valid substitute for the old exam. There is a problem with validity. Which validity is weak in this example?
a. external validity
b. construct validity
c. statistical validity
d. internal validity
Mathematics
1 answer:
balu736 [363]3 years ago
7 0

Answer:

Internal validity

Step-by-step explanation:

The internal validity here is weak

Internal validity describes the extent to which an evidence weighs the cause and effect claim. In this study, the internal validity that brought about failure in the new exam is mainly due to the environment where the exam was written and not the new exam itself.

So this validity is weak in claiming that the new exam is not a good substitute for the old exam.

Putting them in the same good environment might help the researchers to draw a better conclusion.

You might be interested in
Write the equation of a line in slope intercept form with the given slope and y-intercept
k0ka [10]

Answer:

Input work is the work done on a machine as the input force acts through the input distance. This is in contrast to output work which is a force that is applied by the body or system to something else. Output work is the work done by a machine as the output force acts through the output distance.Jan 15, 2020 hsysvd xhs dhdb shsbdhd dhs dys dhd shdbdyd hzgsvdyd xgdbd

5 0
3 years ago
Pattern:
Radda [10]

Answer:

Sue is correct

Step-by-step explanation:

because of the simple fact that the numbers are increasing and not decreasing so why would they do 8n-6

8 0
2 years ago
Solve this identifying holes, vertical asymptotes, and horizontal asymptotes for
USPshnik [31]

x^2+7x+12=x^2+4x+3x+12=x(x+4)+3(x+4)=(x+4)(x+3)\\\\-x^2-3x+4=-(x^2+3x-4)=-(x^2+4x-x-4)\\\\=-[x(x+4)-1(x+4)]=-(x+4)(x-1)\\\\f(x)=\dfrac{x^2+7x+12}{-x^2-3x+4}=\dfrac{(x+4)(x+3)}{-(x+4)(x-1)}\\\\\text{Vertical asymptotes:}\\\\(x+4)(x-1)=0\iff x+4=0\ \vee\ x-1=0\\\\\boxed{x=-4\ and\ x=1}\\\\\text{Horizontal asymptotes:}

\lim\limits_{x\to\pm\infty}\dfrac{x^2+7x+12}{-x^2-3x+4}=\lim\limits_{x\to\pm\infty}\dfrac{x^2\left(1+\dfrac{7}{x}+\dfrac{12}{x^2}\right)}{x^2\left(-1-\dfrac{3}{x}+\dfrac{4}{x^2}\right)}=\dfrac{1}{-1}=-1\\\\\boxed{y=-1}

6 0
3 years ago
Write the number 1/10,000,000 as a power of 10 using a negative exponents
allochka39001 [22]

First, convert into a decimal:

1/10,000,000 = 0.00000001

Next, convert to "the number with a power of 10 using a negative exponent. Move the decimal point to the first <em>number that is not 0</em> (sorry, there is a term for it, but i can't remember it right now, but it is not important to solving the answer)

0.000001 = 1 * 10^-7

1 * 10^-7 is your answer


~

8 0
3 years ago
Evaluate the function y=1/2(x)-4 for each of the given domain values? PLZ HELP ME
erik [133]

Answer:

c. -13/4.

d. -13/3.

Step-by-step explanation:

c. f(3/2) = (1/2)(3/2) - 4

= 3 / 4 - 4

= 0.75 - 4

= -3.25

= -3 and 1/4

= -13/4.

d. f(-2/3) = (1/2)(-2/3) - 4

= -2/6 - 4

= -1/3 - 4

= -1/3 - 12/3

= -13/3.

Hope this helps!

6 0
3 years ago
Other questions:
  • Which sequence is the best financial approach?
    14·1 answer
  • Please help me solve this problem for my homework .<br> X= ?<br><br> 9<br> 16<br> 4
    11·1 answer
  • How many three-fourths are in 3?
    8·1 answer
  • A mathematics professor created a test that was supposed to be mostly easy except for two challenging problems. The scores of th
    5·1 answer
  • Which equation below can be used to determine the value of x?
    6·2 answers
  • I need this ASAP. Pls help
    13·1 answer
  • 9y= 5/7<br> solve as a fraction
    12·2 answers
  • -6 + (-2) + 5= ? <br><br> Help would really be appreciated!! :)
    12·2 answers
  • What is the constant of proportionality? 48= 4k
    14·2 answers
  • Those people at a local car dealership are pay to commission based on the profit earned from each car they sell if the profit is
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!