In: Anatomy and Physiology
Question 462 pts
In between-subjects designs, random assignment distributes participants' individual differences across experimental conditions. This allows researchers to assume that:
Group of answer choices
no condition has an overall advantage relative to the other conditions.
groups of participants do not influence each other.
bias is not a concern in the experiment.
groups of participants are equal.
In: Statistics and Probability
In a psychology experiment, 24 previously unacquainted adults were asked to line up against a wall. The arrangement according to gender (m= male, f = female) was as follows:
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Do the data provide sufficient evidence at α=0.05 significance level to indicate a lack of randomness?
Stating which test was used would be very helpful, thanks!
In: Statistics and Probability
Having identified each of these cDNAs, you want to determine the intracellular route traveled by each of these glycoproteins, and the speed with which they traverse their biosynthetic pathways to arrive at their final destination. How would you use a pulse-chase experiment in combination with monitoring the glycosylation status of your glycoproteins to determine the speed with which these proteins traverse their biosynthetic pathway?
In: Biology
A medical researcher suspects that giving post-surgical patients large doses of Vitamin E will speed their recovery times by helping their incisions heal more quickly.
Design an experiment to test this conjecture. It must be randomized, comparative, double blind and placebo controlled.
Be sure to identify the factors, levels, treatments, response variable and role of randomization.
Thank you.
In: Statistics and Probability
Which of the following represents empirical evidence? Group of answer choices
a. A second-hand account of a researcher’s observations
b. A research study without controls identified
c. An experiment that outlines the methods used
d. A review of studies that have been conducted on vaccine safety
e. Research that cannot be repeated because the methodology isn’t clear
In: Biology
Two fair coins and a fair die are tossed. Find the sample space
of the
experiment (10 pts); Find the probabilities of the following
events:
A- ”the die shows 2 or 3” (5 pts);
B- ”one of the coins is head, the other - tail, and the die shows
an odd number” (5
pts).
Are the events A and B independent? (5 pts).
Give proofs.
In: Statistics and Probability
Mothballs are composed primarily of the hydrocarbon naphthalene (C10H8). When 1.025 g of naphthalene is burned in a bomb calorimeter, the temperature rises from 24.25 ?C to 32.33 ?C.
Find ?Erxn for the combustion of naphthalene. The heat capacity of the calorimeter, determined in a separate experiment, is 5.11kJ/?C.
Express the change in energy in kilojoules per mole to three significant figures.
In: Chemistry
3) An experiment was performed where HEK 293 cells expressing TLR5 was treated with flagellin and the following absorbance readings were measured at 655 nm.
No treatment: 0.232, 0.247, 0.239
Flagellin treatment: 0.355, 0.377, 0.350
What is the P-value as calculated by T-test? Assume 2-tails and equal variance among the groups.
In: Statistics and Probability
The following are the ratings of males by females in an experiment involving speed dating. Use the given data to construct a boxplot and identify the 5-number summary. 1.0 1.5 2.5 2.5 2.5 2.5 3.0 3.0 3.0 3.0 3.0 3.5 4.5 5.5 5.5 5.5 6.5 6.5 7.0 7.0 The 5-number summary is ?
In: Statistics and Probability