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
d1i1m1o1n [39]
4 years ago
10

The Scholastic Aptitude Test (SAT) is a standardized test for college admissions in the U.S. Scores on the SAT can range from 60

0 to 2400. Suppose that PrepIt! is a company that offers classes to help students prepare for the SAT exam. In their ad, PrepIt! claims to produce "statistically significant" increases in SAT scores. This claim comes from a study in which 427 PrepIt! students took the SAT before and after PrepIt! classes. These students are compared to 2,733 students who took the SAT twice, without any type of formal preparation between tries. We conduct a hypothesis test and find that PrepIt! students significantly improve their SAT scores (p-value < 0.0001). Now we want to determine how much improvement we can expect in SAT scores for students who take the PrepIt! class. Which of the following is the best approach to answering this question? Group of answer choices Use the sample mean 29 to calculate a confidence interval for a population mean. Use the difference in sample means (500 − 529) in a hypothesis test for a difference in two population means (or treatment effect). Use the difference in sample means (500 − 529) to calculate a confidence interval for a difference in two population means (or treatment effect). Use the difference in sample means (29 and 21) in a hypothesis test for a difference in two population means (or treatment effect).
Mathematics
1 answer:
seropon [69]4 years ago
4 0

Answer:

Use the difference in sample means (500 − 529) in a hypothesis test for a difference in two population means (or treatment effect).

You might be interested in
Which answer is correct?
dalvyx [7]
(x-p)(x-q)
x^2 -qx -px + pq
x^2 -(q+p) x +pq
so the constant here is the product of p & q
the answer is A
8 0
3 years ago
Read 2 more answers
Sarah wrote the expression 12 ÷ 3 = 4 to represent the number of flowers in each row of Mrs. White’s garden. What is the number
yuradex [85]
It's called the "dividend". A dividend is a number to be divided by another number. The 3 is the divisor, a number by which another number is to be divided.
7 0
3 years ago
The amount of jen's monthly phone bill is normally distributed with a mean of $65 and a standard deviation of 11. what percentag
stepan [7]
It would be 99%. If you draw the normal distribution curve and plot the mean and standard deviation, it might help you visually.

:)



4 0
3 years ago
Minimize Q=x^2+2y^2, where x+y=3
Studentka2010 [4]
<span>The first step you need to do is to rewrite
x+y=3
as y=3-x
</span><span>Now we can replace the y in the equation with our newfound value for y, which is
y=3-x.
So lets write it now like this
Q=x^2+2(3-y)^2
=x^2+18-12x+2x^2
=3x^2+18-12x
</span>Hope this helps
6 0
3 years ago
Please help I’m taking the test and it’s due soon, all you have to do is fill in the blank, it’s really easy if you know geo
Afina-wow [57]

Answer:

130, exterior, 8, 93, 87, interior

Step-by-step explanation:

5 0
3 years ago
Other questions:
  • Find the sum of the squares of the first five natural numbers.
    12·1 answer
  • PLZ HELP IM REALLY CONFUSED WILL MARK BRAINLIEST
    10·1 answer
  • Given the information for Whelan Inc, in problem 10 and 11, suppose you also know that the firm's net capital spending for 2019
    8·1 answer
  • Which expression is equivalent to<br> 3(2x+ 5), no matter what value is substituted in for x
    7·1 answer
  • Marci has a total 50 stamps, consisting of 25 cent stamps and halves the number of 15 cent stamps, they will be worth of $16.50.
    15·1 answer
  • Please help brainliest if correct
    12·2 answers
  • Trevor's family bought 5 tickets to a baseball game. 2 tickets were discounted by $15
    13·1 answer
  • 1, write a ratio in all three forms, to compare the days without games to the days in a year?
    12·1 answer
  • Use the discriminant to describe the roots of each equation. Then select the best description.
    10·2 answers
  • PLEASE HELP ME<br> Answer the question in the picture.
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!