Nann
2021-03-07
In an experiment designed to study the effects of illumination level on task performance (“Performance of Complex Tasks Under Different Levels of Illumination,” J. Illuminating Eng., 1976: 235–242), subjects were required to insert a fine-tipped probe into the eyeholes of ten needles in rapid succession both for a low light level with a black background and a higher level with a white background. Each data value is the time (sec) required to complete the task.
\(\begin{array}{|c|c|} \hline Subject & (1) & (2) & (3) & (4) & (5) &(6) & (7) & (8) & (9) \\ \hline Black & 25.85 & 28.84 & 32.05 & 25.74 & 20.89 & 41.05 & 25.01 & 24.96 & 27.47 \\ \hline White & 18.28 & 20.84 & 22.96 & 19.68 & 19.509 & 24.98 & 16.61 & 16.07 & 24.59 \\ \hline \end{array}\)
Does the data indicate that the higher level of illumination yields a decrease of more than 5 sec in true average task completion time? Test the appropriate hypotheses using the P-value approach.
Lacey-May Snyder
Skilled2021-03-08Added 88 answers
Given:
Given claim: Mean difference is more than 5
The claim is either the null hypothesis or the alternative hypothesis. The null hypothesis and the alternative hypothesis state the opposite of each other. The null hypothesis needs to contain the value mentioned in the claim.
Let us first determine the difference between each pair of data values:
Determine the sample
Determine the sample mean of the differences. The mean is the sum of all values divided by the number of values.
Determine the sample standard deviation of the differences:
Determine the value of the test statistic:
The P-value is the probability of obtaining the value of the test statistic, or a value more extreme, assuming that the null hypothesis is true. The P-value is the number (or interval) in the column title of the Students T distribution in the appendix containing the t-value in the row
If the P-value is less than the significance level, reject the null hypothesis.
There is sufficient evidence to support the claim that the higher level of illumination yields a decrease of more than 5 sec in true average task completion time.
The product of the ages, in years, of three (3) teenagers os 4590. None of the have the sane age. What are the ages of the teenagers???
Use the row of numbers shown below to generate 12 random numbers between 01 and 99
78038 18022 84755 23146 12720 70910 49732 79606
Starting at the beginning of the row, what are the first 12 numbers between 01 and 99 in the sample?
How many different 10 letter words (real or imaginary) can be formed from the following letters
H,T,G,B,X,X,T,L,N,J.
Is every straight line the graph of a function?
For the 1s orbital of the Hydrogen atom, the radial wave function is given as: (Where ∘A)
The ratio of radial probability density of finding an electron at to the radial probability density of finding an electron at the nucleus is given as (). Calculate the value of (x+y).
Find the sets and if and . Are they unique?
What are the characteristics of a good hypothesis?
If x is 60% of y, find .
A)
B)
C)
D)
The numbers of significant figures in are:
A)Two
B)Three
C)Ten
D)Thirty one
What is positive acceleration?
Is power scalar or vector?
What is the five-step process for hypothesis testing?
How to calculate Type 1 error and Type 2 error probabilities?
How long will it take to drive 450 km if you are driving at a speed of 50 km per hour?
1) 9 Hours
2) 3.5 Hours
3) 6 Hours
4) 12.5 Hours
What is the square root of 106?