# A researcher is interested in investigating whether people perform better at dexterity tests while listening

A researcher is interested in investigating whether people perform better at dexterity tests while listening to classical music or with no music. He designs a dexterity test which he intends to give to participants with and without classical music playing. Do you think that a paired t-test, a two-sample t-test, a paired Z-test, or a two sample Z-test would be more appropriate in this situation? If you think that a paired test is preferable, explain what would constitute a pair. A. A paired t-test is more appropriate since a natural pairing exists. A pair should consist of a person taking the test while listening to classical music and the same person taking the test without music.
B. A two sample t-test is more appropriate since a no natural pairing exists. It is too hard to select two people who are similar and pair them together.
C. A paired Z-test is appropriate because the before and after differences of the dexterity measurements are normally distributed. A pair should consist of a person taking the test while listening to classical music and the same person taking the test without music.
D. A two sample Z-test is more appropriate since a no natural pairing exists because the dexterity measurements are normally distributed.. It is too hard to select two people who are similar and pair them together.
E. It does not matter which test one uses. A two-sample t-test and a paired t-test always give similar results because both tests are t-tests.

## This Post Has 10 Comments

1. imantahir1200345 says:

Explanation:

Between 2 waves, if path difference is mλ, m is an integer and they interfere constructively.

Between 2 waves, if path difference is (m+1/2)λ, m is an integer and they interfere destructively.

2. isabellainksow87vn says:

price of bread $1.25$5.00   $9.00$15.00

person one         10          2          0            0

person two           5           4          1            0

person three        20         10        5             1

person four           2             1         0           0

person 5                8             2       2             0

person 6                 5            5        3           2

person 7                   15           3       1         0

person 8                    1             0       0        0

person 9                      25         5         2       1

person 10                     8            5         3      2

hope this helps if im not too late

3. kprincess16r says:

The atoms combine to form molecules and attain stability by completing their octet. The formation of compound can take place either by transfer of electron from one atom to other or by sharing of electrons between them.

Resonance structure of a molecule is of two or more forms in which the distribution of electrons around the structure is different but the chemical connectivity is same.

The total number of valence electrons in $NNO$ is:

$2(5) + 6 = 16 electrons$

Among the molecule, the electrons are distributed in atom in such a way that formation of triple bond will take place between two nitrogen atoms and a single bond will form between nitrogen and oxygen atom.

The formal charge on each atom is determined as:

$Formal charge = Valence electrons - Nonbonding electrons - \frac{bonding electrons}{2}$

The formal charge on each atom is: the nitrogen atom in center will possess 1+ formal charge and oxygen will possess 1- charge (oxygen is electronegative atom). Thus, results in formation of neutral molecule.

The structure of $NNO$ is shown in the image.

The resonance form which is likely to contribute most to the correct structure of $N_2O$ is:

Structure for $NNO$ showing one lone-pair of electrons on the terminal nitrogen atom, a triple bond between the two nitrogen atoms, a single bond between nitrogen and oxygen, and three lone-pairs of electrons on the terminal oxygen atom.

$Which resonance form is likely to contribute most to the correct structure of n2o? which resonance$

4. 4300252063 says:

b. Mismatch repair will identify abnormal G-G and C-C base pairs and may convert the D allele to a d allele or the d allele to a D allele.

Explanation:

The expected outcome if branch migration occurs is that mismatch repair will identify abnormal G-G and C-C base pairs and may convert the D allele to a d allele or the d allele to a D allele.

5. rostecorralmart says:

According to Watson-Crick base-pairing, which forms the basis for the helical configuration of double-stranded DNA, DNA contains four bases: the two purines adenine (A) and guanine (G) and the two pyrimidines cytosine (C) and thymine (T).

6. savannahworkman11 says:

Portugal has a comparative advantage in producing wine.

Denmark has a comparative advantage in producing jeans.

Portugal can gain from specialization and trade as long as it receives more than 4 pairs of jeans.

Denmark can gain from trade as long as it receives more than 1/4 bottles of wine.

The trade price will be 8 pairs of jeans per bottle of wine.

Explanation:

Portugal and Denmark both produce jeans and wine.

Portugal's opportunity cost of producing a bottle of wine

= 4 pairs of jeans

Denmark's opportunity cost of producing a bottle of wine

= 10 pairs of jeans

Portugal has a lower opportunity in producing wine so it has a comparative advantage in producing wine.

Portugal's opportunity cost of producing a pair of jeans

= $\frac{1}{4}$

= 0.25

Denmark's opportunity cost of producing a pair of jeans

= $\frac{1}{10}$

= 0.1

Denmark has a lower opportunity in producing jeans so it has a comparative advantage in producing jeans.

Portugal can gain from trade as long as it receives more than 4 pairs of jeans for each bottle of wine. While Denmark can gain from trade as long as it receives more than 1/4 bottle of wine for each pair of jeans.

Both the countries will gain from trade if the trade price lies between the opportunity cost of both countries. Here the trade price will be 8 pairs of jeans per bottle of wine.

7. bikkiecuanas13 says:

Insertion of 1 base-pair in the region of the proline codon

Deletion of 2 base-pairs in the region of the proline codon

Insertion of 4 base-pairs in the region of the proline codon

Deletion of 5 base-pairs in the region of the proline codon

AND ALSO CHECK MY LATEST QUESTION

8. kodak0531 says:

The best answer to the question, given the research found on this particular process in E. Coli specifically, would be: D) It identifies hemimethylated base pairs and methylates the unmodified base.

Explanation:

According to research on this pretty complicated topic, in E. Coli specifically, and other gram negative prokaryotes, it has been found that the presence, or absence of methylation will initiate MutS, which is a protein both in prokaryotes and eukaryotes responsible, in a full complex, of initiating and carrying out the full mechanism of DNA mismatch repair. As the daughter DNA strands are produced from parent strands, these first ones arise with several deletions and mismatches which need to be repaired and they are recognized due to the fact that daughter strands are hemimethylated. This circumstance activates MutS in E. Coli, who will then bind to the DNA strand that needs to be repaired and together with other members of the complex, like MutH and MutL, begin the process of repair.

In eukaryotes and other prokaryotes, the exact process by which DNA is repaired by MutS is still not totally known.

9. meababy2009ow9ewa says:

1. RNA

2. Cytosine and guanine

3. RNA

4. Replication

5. Unwinding the double helix

6. DNA polymerase

7. Identical

8. Repair the DNA

9. Changes in nucleotides of a DNA molecule that affect the genetic message

10. The gene for beta-galactosidase turns off.

11. p53

12. A part of DNA that does not code for a functional protein

13. Proteins

14. Transfer RNA

15. The making of an RNA molecule from a DNA strand by pairing of bases of RNA nucleotides with the complementary bases in DNA

16. 3

17. Tertiary

18. Enzymes

19. The reaction slows down.

20. The active site of an enzyme

21. 60%

22. Conserved energy

23. different

24. Gene expression

I hope that this helps you !

10. favpat11 says:

1) 3 socks

2) 5 socks

3) 1 pair of socks

Explanation:

1) In the second trial, you choose one color, you say black, first, and second, say blue. The third sock you're taking out now has two black or brown. Therefore, you must draw at least 3 socks to ensure that you have a single color pair..

2) You get black first.

You're pulling out brown, second.

You tear down charcoal, Thrid.

Second, you cut out charcoal. (one pair complete)

Second, you're only heading out. (2 pairs full) Thus, you have to take out at least 5 socks to guarantee two pairs in the same colour.

3) You want 1 pair of black socks

The worst case is:  [ 5 blu ]

The 6th pick guarantees you will have 1 pair of black socks