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A box of 9 gloves contains two left handed gloves and seven right handed gloves.
a: If two gloves are randomly selected from the box, without replacement, what is the probability that both gloves will be right handed?
b: If two gloves are randomly selected from the box without replacement, what is the probability that there will be one right handed glove and one left handed glove?
c: If three gloves are selected with replacement, what is the probability that all three will be left-handed?
d: If you were sampling with replacement, what would be the answers to "a" and "b"?
Using ANOVA summary table, find out if regression model is significant.
To determine her blood pressure, Carolyn divides her day into three parts; morning, afternoon, and evening. She then measures her blood pressure at 4 randomly selected times during each part of the day. What type of sampling is used?
When water taxi sank in the Baltimore Inner Harbor, an investigation revealed that the safe passenger load for water taxi was 3500 lbs. It was also noted that the mean weight of passenger was assumed to be 140 lbs.
Describe 5 data collection techniques in your own words. Explain why the four demographic questions you included in your survey are important and or are of interest to the study.
The formula for the ratio is the mileage that 14 students drive to work out of 20 students. Compute the central tendency (mean, median, mode) and dispersion (range, variance, standard deviation).
In a nationwide study directed by UMUC Teaching Hospital, 780 persons with stable heart disease were treated. Half of the subjects were treated with drugs and half underwent bypass surgery.
At 5% level of significance, does this sample prove violation of guideline that average patient must pay no more than $250 out-of-pocket? Write your hypotheses and decision rule.
When the Sharpe Ratio for the market portfolio is 0.5, what risk-free rate Rf is the market anticipate? Draw on a diagram for the Capital Market Line derived from the above data. Make sure to clarify the intercept and the slope.
A population has a mean = 80, with standard deviation = 8. The distribution of sample means for samples of size n = 4 selected from this population would have an expected value of?
The lengths of pins produced by a machine follow a normal distribution with mean 2.54 cm and standard derivation 0.04 cm.
Understand autocorrelation and multicollinearlity in reference to the following questions. What type of regression is it common in? When is it likely to occur? What is its negative impact? How do we see if it exists? If found, how is it eliminated..
Assume that Leo advertises "If it takes more than 30 minutes to get your pizza, you get it free". What percentage of his take-out pizzas will have to give away free?
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