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At the receiver, if two or more 1's are received, the decoder decides that message 1 was sent; otherwise, i.e., if two or more zeros are received, it decides that message 0 was sent. Assuming bit er
This is a poor experiment because the sample size is likely to be too small to detect anything but a large improvement when measuring the proportion reporting an improvement.
A manufacturer of computers has three plants, A, B, and C. Plant A manufactures 60% of the computers, plant B manufactures 15%, and plant C manufactures 25%. Plant A has a defective rate of 0.5 per
A nutritionist wants to study the effect of storage time (6, 12, and 18 months) on the amount of vitamin C presents in freeze dried fruits when for these length of time. Vitamin C is measured in mil
A state lottery randomly chooses six balls numbered from 1 to 40 you choose six numbers and purchase a lottery ticket. The random variable represents the number of matches on your ticket to the numb
Suppose that a random sample of 5 suspects is subjected to a lie detector test regarding a recent one-person crime. Then the probability of observing no positive reading if all suspects plead innoce
A recent insurance industry report claimed that 40 percent of those persons involved in minor traffic accidents this year have been involved in at least one other traffic accident in the last five y
Requests for credit card approval issued from Metro Market foramounts in excess of $400 are denied 15% of the time. Given that the 51st such creditdenial occured on the 301th requests, determine the
If data set A of (x,y) data has correlation coefficient r=0.65, and a second data set B has correlation r= -0.65, then
Which of the following would be a valid conclusion to draw from the study? A teacher can improve his or her teaching evaluations by giving good grades.
Based upon historical records, the weather office has estimated the chances of a warm day to be 0.60; the chances of a cool day to be 0.25. What is the producer's expected profit?
It has been estimated that about 30% of frozen chickens contain enough salmonella bacteria to cause illness if improperly cooked. A consumer purchases 12 frozen chickens. What is the probability tha
What are some of the advantages of large random samples compared to small random samples?
Can you answer it if you assume the current population survey was based on indepent simple random samples in each year of 50,000 women age 16 and over?
100 people are chosen at random without replacement from a group consisting of 102 women and 248 men. How likely is it that the sample includes 9 women or fewer?
A group of 50,000 tax forms has an average gross income of 37,000 with a SD of 20,000. Furthermore 20% of the forms have a gross income over 50,000. A group of 900 forms is chosen at random for audi
Find the regression equation or predicting final score from midterm score, based on the following information.
if you took the men and women torture would the SD of their weights be smaller than 9kg just about 9kg or bigger than 9 kg? Why?
according to buausch & lomb corporation half of those who need vision correction are patient who require bifocal lenses. For randomly selected group of three people who require vision correctio
The following data show the test scores of six individuals on a standardized test before and after attending a preparation seminar for the test.
Compute the Spearman rank-correlation and test it for significance. Let ? = 0.05.
the heights of men on a baceball team have a bell shaped distribution mean of 178 cm and a standard deveiation of 7 cm. Using the empirical rule what is the approximate percentage of the men between
For 60 days a child has a 2.7% everyday of winning a prize for entering a school contest. There are approximatly 128,000 children entering the contest. What is the probability that a child will win
A computer system requires all uses to log on using a 6 character password. if each character can be either a digit from 0 to 9 or a letter of the alphabet, what is the number of possible passwords