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Three couples and two single individuals have been invited to a party. Assume independence of arrivals to the party, and that the probability pf any particular individual or any particular couple ar
A total of 1120 received drug-coated stents, and 134 of them required treatment within ayear. At the 0.01 significance level, test the claim that the proportion of patients who needed retreatment wa
The average number of children for women was 1.85 with a standard deviation of 1.57. At the 0.05 significance level, test the cliam that the average number of children for men is equal to the averag
At the 0.01 significance level, test the claim that a majority of those with type 2 diabetes who undergo this surgery will recover from diabtes.
Fro this sample, the mean weight lost was 18.65 pounds with a standard deviation of 8.82 pounds. At the 0.05 significance level, test the claim that the mean weight loss is more than 15 pounds. The
The Center of Disease Control and Prevention reported the diastolic blood pressure of adult women in the US are approximately normally distributed with a mean of 80.5 and standard deviation of 9.9
For each of the following situations, indicate how you might use ratio or regression estimation. Estimate the proportion of time in television news broadcasts in your city that is devoted to sports.
If A and B are mutually exclusive events then P(A or B) equals...
A 6-faced die is rolled two times. Let A be the event that the outcome of the first roll is greater than 4. Let B be the event that the outcome of second roll is an odd number. 8. What is the probab
Suppose f(x, y)=1 & g(x, y)= x+y ,0< x <1, 0<y<1 , Determine the most powerful test of size ? =.05 of hyp:(X,Y)~f vs.alt:(X,Y)~g
Write the expression for P(X = 15 tasters) using pk(1-p)n-k notation. Use your calculator to evaluate the expression in a.).
A newspaper article reported that a poll based on a sample of 1150 residents of a state showed that the state's Governor's job approval rating stood at 58%. They claimed a margin of error of ±
Compute a 95% CI for the true average porosity of a certain seam if the average porosity for 20 specimens from the seam was 4:85. How large a sample size is necessary if the width of the 95% interva
Generate 50 normal distributions with mean= 15 and standard deviation= 3 with a sample size of 30 each. For each of these data sets, calculate the 90% con dence interval. How many of the 50 confiden
On a recent prostate cancer screening test, Bobo received positive results. It is known that this type screening test will show 99 percent positive for people who have cancer and 1 percent positive
The number of taxis arriving at a train station follows the Poisson distribution. The average arrival rate is 30 taxis per hour. Bobo has just missed a taxi. What is the probability that his waiting
The four year graduation rate at the University college of Engineering is 60%. Class of 2015 UNM-COE has 250 students. What is the probability that:
Suppose the weights of the contents of cans of mixed nuts have a normal distribution with mean 32.4 ounces and standard deviation 0.4 ounce. If two packages are randomly selected, what is the proba
A: use the sample data to construct a 95% confidence interval estimate of the percentage of the cell phone users who develop cancer of the brain or nervous system.
The following is a cross-tabulation taken from a subset of the 2010 General Social Survey. Respondents were asked whether they had seen an "X-rated" movie in the last year. For the table
For the same question, a random sample of 400 Kumon students resulted in 130 getting the correct answer. Perform the appropriate test to substantiate Kumon's claims. Are there any confounding factor
The appropriate distribution for calculating the confidence Interval is: z distribution t distribution, Chi Square, Uniform What is the numerical value of the variable from the appropriate distribut
The mean gross annual income of certified welders are normally distruted with the mean of 20,000 and a standard deviation of 2200. The ship building association wishes to find out whether this numb
The distribution of the annual incomes of a group of middle management employees approximated a normal distribution with a mean of $39,924 and a standard deviation of $836. About 60 percent of the i