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A. What is the sensitivity of self reported smoking status? B. What is the specificity of self reported smoking status?
The surgery is performed on 5 patients. Find the probability of the surgery being successful on more than 3 patients?
Develop 95% confidence intervals for the proportion of all students, the proportionof male students, and the proportion of female students who were involved in sometype of cheating.
The temp readings are normally distributed. What is the probability the temp in LA is less than 78.22 F any given day.
What are the optimal values of A and B? What is the minimum cost?
Assume that the data has a normal distribution and the number of observations is greater than fifty. Find the critical z value used to test a null hypothesis.
How do you go about calculating different probabilities--say an item was selected at random and we wanted to know how far it is from the mean or the probability that it is at least 4.5 or more?
Find the probability that the number of couples who say they paid for their honeymoon themselves is more than one.
The respective probabilities of detecting an individual failure in a component are .8, .9 and .9. A failure happens. What is the probability of detecting it?
A coin is chosen at random from the lot and tossed. It turns up heads six times in a row. What is the probability that it is the two headed coin?
One sample of individuals is given the medicine and a seond sample is given an inactive placebo. Blood pressure is measured for each individual. For this study, what is the dependent variable?
Suppose you have an investment A whose return is normally distributed with mean 8% and standard deviation of 5 %. An alternative investment B gives an the same return with a standard deviation of 8
Use the computer to calculate the following probabilities:
The price of Amazon is also normally distributed with a mean of 40 and a variance of 119. James finds out that these stocks are negatively correlated, with δ = -0.4. (a) Find the mean and stan
Response time at an online site can be modeled with an exponential distribution with a mean service of 5 minutes. John knows this and it is not sure to wait for an answer. What is the probability t
Question: An instructor graded a large number of midterm exams and she considers that the test scores are normally distributed with a mean of 70 and a standard deviation of 10.
A teacher gave a reading test to a class of 5th grade students and computed the mean, median and mode for the test scores. Which of the following statements cannot be an accurate description of t
50 people are selected randomly from a certain population and it is found that 13 people in the sample are over 6 feet tall. What is the point estimate of the proportion of people in the populat
Find how much she is expected to pay in January. Moreover, obtain the variance and standard deviation of the heating bill.
Response time at an online site can be modeled with an exponential distribution with a mean service of 5 minutes. John knows this and it is not sure to wait for an answer. What is the probability th
A researcher reports an F-ratio with df 3, 36 from an independent-measures research study. How many treatment conditions were compared in the study?
When determining the sample size needed to achieve a particular error estimate you need to know sigma. What are two methods of estimating sigma if sigma is unknown?
If each possible committee arrangement is equally likely, what is the probability that no person will serve on more than one?
A consumer organization estimates that over a 1 year period, 18% of cars will need to be repaired once. If you own 2 cars, what is the probability that neither will need to be repaired?
What are some of the significant problems that transgender suspects face in the criminal justice system?