Question

In a randomization test, if out of 999 random re-shuffles of data between two groups only one has a difference between means greater than actually observed, what would the p-value be?

A) 1/999

B) 2/999

C) 2/1000

Please help with explaining which one would be the correct answer?

Answer #1

1. if a statistically significant difference was found between
two means using an independent-samples t test, which of the
following interpretations would be correct.
A) something over and above sampling error is responsible for
the difference between sample means
B) the difference between two means is meaningful.
C)it is unlikely that something other than error is responsible
for the difference between the sample means.
D) the difference between the two means is due to a large effect
size
2. in...

2. Two ride-sharing companies, A and B, provide service for a
certain city. A random sample of 52 trips made by Company A and a
random sample of 52 trips made by Company B were selected, and the
number of miles traveled for each trip was recorded. The difference
between the sample means for the two companies
(A−B) was used to construct the 95 percent confidence interval
(1.86,2.15).
Which of the following is a correct interpretation of the
interval?
A....

Suppose that a random sample of 1000 potential voters was
randomly divided into two groups.
Group 1: 470 potential voters; no registration reminders sent; 230
registered to vote
Group 2: 530 potential voters; registration reminders sent; 350
registered to vote
Do these data support the claim that proportion of voters who
registered was greater in the group that
received reminders than in the group that did not, at the 5%
significance level?
1. a) Describe in words and symbols the...

(1) A Chi-squared test is typically used to test for any of the
following except which of the following?
(A) If a mathematical model accurately predicts our observed
frequencies of data values.
(B) If a mathematical model accurately predicts the total number
of observed data values.
(C) If a mathematical model accurately predicts the pattern of
our observed data values.
(D) Whether two factors present in a population are independent
of one another.
(E) Whether a series of populations experience...

For the following experiment/question, pick the most appropriate
statistical test. You have the following statistical tests as
choices: some may be used more than once, others not at
all. Assume homogeneity of variance (where
applicable) and the validity of parametric tests (where
applicable), unless something is directly stated (e.g., “the data
are not at all normal”) or otherwise indicated (viz., by the
inspection of the data) which would indicate a strong and obvious
violation of an assumption. This means you must...

10 subjects in a study were randomly assigned into two
equally sized groups. One group was shown a short video on how to
fold paper cranes. The other group was given an instruction booklet
on how to do so. They were then asked to make paper cranes for the
next hour. The number of paper cranes each subject made was
recorded and is listed in the table below. The researchers are
interested in whether there was a difference in the...

Independent simple random samples are taken to test the
difference between the means of two populations whose
variances are not known. Given the sample sizes
are n1 = 11 and n2 = 16; and the sample
variances are S12 = 33 and
S22 = 64, what is the correct distribution to
use for performing the test?
A.
t distribution with 49 degrees of freedom
B.
t distribution with 59 degrees of freedom
C.
t distribution with 24 degrees of freedom...

2. For the following experiment/question, pick the most
appropriate statistical test. You have the following statistical
tests as choices: some may be used more than once, others not at
all. Assume homogeneity of variance (where applicable) and the
validity of parametric tests (where applicable), unless something
is directly stated (e.g., “the data are not at all normal”) or
otherwise indicated (viz., by the inspection of the data) which
would indicate a strong and obvious violation of an assumption.
This means...

The two-sample t-test is one of the most commonly used
hypothesis tests in Six Sigma work. It is applied to compare
whether the average difference between two groups is really
significant or if it is due instead to random chance. Select an
application of the two-sample t-test and describe how it was
justified to use the t-test for this particular application.
Describe what the P-value of the 2-sample t-test of your example in
part (1) means. Note that you are...

For the following experiment/question, pick the most appropriate
statistical test. You have the following statistical tests as
choices: some may be used more than once, others not at
all. Assume homogeneity of variance (where
applicable) and the validity of parametric tests (where
applicable), unless something is directly stated (e.g., “the data
are not at all normal”) or otherwise indicated (viz., by the
inspection of the data) which would indicate a strong and obvious
violation of an assumption. This means you must...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 6 minutes ago

asked 13 minutes ago

asked 27 minutes ago

asked 27 minutes ago

asked 38 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 2 hours ago