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Appending three extra (binary) bits to a 4-bit word in a particular way (a Hamming Code) allows detection and correction of up to 1 error in any of the bits. If each bit has a probability of .05 of being changed during the communication, and if the bits are changed independently of each other, what is the probability that the word is correctly received (that is, 0 or 1 bit is in error)? How does this probability compare to the probability that the word will be received correctly if we didn't use check bits, in which case all 4 bits would have to be received correctly for the word to be correct?
Suppose that we observe a random sample size n from a normally distributed population. If we are able to reject H0:µ = µ in favor of a two-tailed alternative hypothesis at the 10% significant level
what is the equation that predicts mortgage amount from interest rate? Compute the slope of the straight line. compute the y-intercept of the straight line.
Describe a psychological research situation or scenario that would use a nonparametric test. Why would the nonparametric test be used?
Four percent of the customers of a store buy cigars. Half of the customers who buy cigars buy beer and one fourth of those who buy beer buy cigars. The table is given below:
Is there any evidence that the different teatments produced different responses? If so, which one seems to work best?
Suppose that weights of bags of potato chips coming from a factory follow a normal distribution with mean 12.8 ounces and standard deviation .6 ounces.
Compute the mean number and median number of apples in a bag.
Bbutton to determine whether the design of the control panel was contributing to the high rate of accidents in the plant. The resulting scores were as follows:
Compute the minimum sample size required assuming that no prior information is avaiable?
Multiple choice question based on multiple regression - partial computer output based on a sample of 16 observations and find the estimated regression equation
Four components of a time series are secular trend, cyclical variation, seasonal variation, and irregular variation (Lind, 2005). Briefly describe each of these components and provide a real-world example of one component.
Why is effective sampling important when performing a hypothesis test? What could happen if your sample is not appropriate to your study?
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