Questions
change control meeting and communication - decribe how you will conduct change control meetings and communicate...

change control meeting and communication - decribe how you will conduct change control meetings and communicate project changes to stakeholders

In: Operations Management

)While referencing the concept of globalization, discuss how applied linguistic anthropology is relevant to all societies...

)While referencing the concept of globalization, discuss how applied linguistic anthropology is relevant to all societies impacted by global changes.

In: Psychology

The adolescent stage is dynamic and fraught with changes. How does growth and developmental level influence...

The adolescent stage is dynamic and fraught with changes. How does growth and developmental level influence health and health-related decisions?

In: Nursing

List and explain four changes in the United Kingdom economy that result from the country’s exit...

List and explain four changes in the United Kingdom economy that result from the country’s exit from the European Union (Brexit).

In: Operations Management

explore the economic changes which occurred in the United states related to the industrial revolution, urbanization...

explore the economic changes which occurred in the United states related to the industrial revolution, urbanization and developments in technology/mass culture

In: Psychology

A psychologist is interested in the effect that no sleep has on individuals’ abilities to perform...

A psychologist is interested in the effect that no sleep has on individuals’ abilities to perform motor tasks (physical abilities). She recruits a sample of n = 25 college students to serve as the control group, which is allowed to sleep up to 10 hours. A second sample of n = 25 college students is selected and stays up all night. The following morning, the students attempt to make 20 free throw shots with a basketball, the number of shots made are recorded. The data for the two groups is listed below:

Sleep
n1 = 25
M1 = 12
SS1 = 916

No sleep
n2 = 25
M2 = 8
SS2 = 620

Determine whether lack of sleep had a significant effect on motor tasks using α =.05 test of significance by answering the following questions:

1.Write the null hypotheses in words.

2.Write the alternative hypotheses in words.

3. What is the critical t value(s) that sets off the critical boundary or boundaries?

4.What is the pooled variance?

5. What is the estimated standard error (standard error of the mean difference)?

6.What is the calculated t statistic for our sample?

7.What is your decision (reject or fail to reject the null hypothesis)?

8.Explain in words the result of this t-test.

9. Compute Cohen’s d (even if not significant) to measure the size of the treatment effect.

10. Interpret Cohen’s d.

In: Statistics and Probability

A certain brand of light bulb is advertised to last 1600 hours. Suppose that the lifetimes...

A certain brand of light bulb is advertised to last 1600 hours. Suppose that the lifetimes of the light bulbs are normally distributed with a mean lifetime of 1650 hours and a standard deviation of 60 hours. (a) Sketch the normal distribution, go out 3 standard deviations.

(b) What proportion of the light bulbs last at least the advertised time of 1600 hours? P(x ≥ 1600) = (Use the normalcdf on your graphing calculator.)

(c) What proportion of light bulbs last less than 1500 hours? P(x < 1500) = (Use the normalcdf on your graphing calculator.)

(d) What proportion of light bulbs last between 1700 hours and 1800 hours? P(1700 < x < 1800) = (Use the normalcdf on your graphing calculator.)

(e) What is the 75th percentile of the distribution of light bulb lifetimes? (Use the invNorm function on your calculator.) “75% of the light bulbs last ___________ hours or less.

(f) What lifetimes make up the middle 90% of lifetimes? (Use the invNorm function on your calculator.) “90% of the light bulbs last between __________ hours and __________ hours.” (Hint: If the area of the middle region is 0.90, then the total area of the two tails is 1 – 0.90 = 0.10, and the area of each tail is ½(0.10) = 0.05. One of the boundaries is the 5th percentile of the distribution. The other boundary has an area of 0.05 to the right.)

In: Statistics and Probability

After Texas won its independence from Mexico, why didn’t Andrew Jackson and Martin Van Buren annex...

After Texas won its independence from Mexico, why didn’t Andrew Jackson and Martin Van Buren annex Texas?

Texas did not request annexation – the first president of Texas wanted it to remain an independent empire.

Both men were afraid of a war with Mexico, believing that the United States was not yet strong enough to defeat a people who had just won their independence from Spain.

They feared that adding Texas as a slave state would split the Democratic Party.

Elites in Texas wanted too much in “investment” money (bribes) to sell Texas.

    

True or False: The vast majority of people in the North accepted the Fugitive Slave Act as part of the cost of keeping the union intact and cooperated with the law by returning some 140,000 run-away slaves to their Southern masters between 1850 and 1858.

True

False

    

What was included in the Compromise of 1850?

Southerners received the Fugitive Slave Act and Northerners received California as a free state.

New Mexico received a larger area of land and the slave trade was abolished in Washington D.C.

New territories were established in the west on the basis of popular sovereignty.

All of the Above

    

True or False: President James K. Polk maneuvered Mexico to attack U.S. forces by provocatively sending them to the Rio Grande River, a disputed boundary area, among other actions.

True

False

In: Economics

A neuropsychologist and physical therapist believe that patients with brain injury who begin physical therapy very...

A neuropsychologist and physical therapist believe that patients with brain injury who begin physical therapy very early have better cognitive outcomes that patients who do not engage in early intervention. To test their research question they design a study using two groups of patients on the rehabilitation unit. One group of patients begins physical therapy within two hours of their transfer to the unit. Physical therapy involves sitting up, moving to the edge of the bed, placing feet on the floor and standing (with assistance) three times per day. The other group receives current treatment practices. After 3-weeks on the unit, a cognitive test of attention was administered. Using α = .05, determine whether the results were statistically significant.

Early Intervention No Intervention
n = 4 n = 4
M =63 M = 57
SS = 28 SS = 20
  1. Identify the independent variable.

  2. Identify the dependent variable.

  3. State the null and alternative hypothesis . You can use words or notation.

  4. Establish the critical boundary for the research question

  5. Calculate

    • Include answer for pooled variance
    • Include answer for standard error
    • Include answer for t-score
  6. Summarize your results, including research notation, your decision and an explanation

  7. Calculate and interpret r2 (if appropriate)

  8. What else could explain the change in attention between the samples (confounding or extraneous variables - think groups not just individual people)?

In: Statistics and Probability

QUESTION 1 Every  eukaryotic cell A. contains a prokaryotic cell B. has a cell wall composed of...

QUESTION 1

  1. Every  eukaryotic cell

    A.

    contains a prokaryotic cell

    B.

    has a cell wall composed of cellulose that serves as the outer boundary of the cell

    C.

    possesses flagella and cilia, unlike prokaryotes

    D.

    has its genetic material concentrated in a membrane-enclosed nucleus

    E.

    contains  all of its genetic material in mitochondria

1.5 points   

QUESTION 2

  1. A codon is

    A.

    a type of DNA repair enzyme

    B.

    a sequence of nucleotides that makes up a whole gene

    C.

    the part of the ribosome to which mRNA attaches

    D.

    a form of birth control for male or female

    E.

    a sequence of three nitrogenous bases on mRNA that corresponds to an amino acid

1.5 points   

QUESTION 3

  1. A disorder of the nervous system in which the individual has an inflammation of the layers that surround the brain is called:

    A.

    meningitis

    B.

    lactose intolerance

    C.

    overnutrition

    D.

    Encephalitis

    E.

    shingles

1.5 points   

QUESTION 4

  1. A molecule used by the body in a Specific Response is an immuniglobulin (I gG), it is a class of  molecules known as

    A.

    NK cells

    B.

    CD 8 cells

    C.

    CD4 cells

    D.

    antibodies

1.5 points   

QUESTION 5

  1. A neuron at rest has a charge difference across its cell membrane, with the interior of the cell negative relative to the exterior. This difference in charge across the plasma membrane is referred to as ________ membrane potential

    A.

    graded

    B.

    action

    C.

    depolarization

    D.

    refractory

    E.

    resting

In: Biology