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Assume that you are expecting a medium effect size, ? = 0.05, and a minimum power of 0.80. Your experiment utilizes three (3) groups. What is the required sample size (a priori)? How many data point
Suppose a researcher was investigating how much time students spend studying each week. She randomly selected 100 students from a population known to be skewed towards higher study times. The condit
Thirty students recorded the colors of their eyes, choosing from the colors brown, blue, green, hazel, and black. This data can be appropriately summarized in a(n)______________
Two sides dice are .Let A represent the set of tosses for which the sum of dice is even , B be the set of tosses for which at least one dice shows a 3 and C be the set of tosses for which the sum of
To see whether or not the proportions have changed, a sample of 300 students was taken. Ninety of the sample students are in the Business College, 120 are in the Liberal Arts College, and 90 are in
We are interested in determining whether or not there has been a significant change in the classifications between the last school year and this school year.
Use a normal approximation to find the probability of the indicated number of voters. in this case assume that 145 eligible voters aged 18-24 are randomly selected. Suppose a previous study showed t
They then report the probability of getting six heads or six tails in a row when flipping a coin 200 times is 0.977. What is wrong with this statement.
Explain the concept and application of uniform distribution.
In the sample, the mean score is 64 points, and the standard deviation is 12 points. What is the margin of error associated with the confidence interval?
Two different alloys are being considered for making lead-free solder used in the wave soldering process for printed circuit boards. A crucial characteristic of solder is its melting point, which is
The Assignment 4 Real Estate data set has information on prices that houses sold for in five different towns. We want to test the null hypothesis that the mean prices are equal in the five towns.
A Pew Research Center Poll used telephone interviews to ask American adults if parents are pushing their kids too hard to succeed in school. Of those responding, 56% said parents are placing too lit
State the hypothesis of interest and conduct the appropriate hypothesis test to determine whether there is a relationship between employment sector and investing preference. Use a level of signific
Consider the following sample of observations on coating thickness for low-viscosity paint:
Construct a probability distribution for a family of three children. Let X represent the number of boys. Assume there is an equal chance of having a boy or a girl for each child. Include your probab
Suppose X has density function f(x) for a\leqx\leqb and Y=cX+d, where c>0. Find the density function of Y.
In a certain rural area of New York state, 80% of drivers use chains on the car tires for winter driving. 60% of drivers carry a snow shovel in their car and use chains on their car tires. 15% of dr
One way to establish validity of a questionnaire is by measuring: the correlation between the score on the questionnaire and another measure of the same concept
Which of the following statements is a good definition of instrument validity?
Average fuel consumption for a Boeing 747 commercial jet in cruising position is 3213 gallons of jet fuel per hour (based on information from Canadian Pacific Air). Assume that the fuel consumption
When testing for the significance of the slope parameter, which of the following are implied by the alternative hypothesis? Two answers correct. All or nothing credit.
Thickness measurements of ancient prehistoric native american pot shards discovered in a hopi village were approximately normally distributed with a mean of 5.1 mm and a standard deviation of 0.9 mm
How many different seven-digit phone numbers can be generated provided that the first digit cannot be zero? Explain what model you use to argue your case. Answer: 9x10^6 . Please explain how we got