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A test to determine whether a certain antibody is present is 99.8 % effective. This means that the test will accurately come back negative if the antibody is not present? (in the test? subject) 99.8?% of the time. The probability of a test coming back positive when the antibody is not present? (a false? positive) is 0.002.
Suppose the test is given to seven randomly selected people who do not have the antibody.
?(a) What is the probability that the test comes back negative for all seven people?
?(b) What is the probability that the test comes back positive for at least one of the seven ?people?
The best estimator or appreciative for the population proportion is 0.45. How large must the sample be?
Perform exploratory data analysis on all variables in the data set. Realizing that you have six groups, be sure that your exploratory analysis is broken down by group. When possible, include appropriate graphs to help illustrate the dataset.
professor fair believes extra time does not improve grades on exams. he randomly divided a group of 300 students into
Carry out a complete analysis, indicating exactly what is significant and why, as well as a discussion about whether the assumptions are being met.
a random sample of 25 was drawn from a normal distribution with a standard deviation of 5. the sample size is 400.
Two manufacturing facilities produce 1280 × 1024 LED (light-emitting diode) displays. Twelve displays are chosen at random from each lab, and the number of bad pixels is noted for each display.
the weight of coffee in a can is normally distributed with a mean of 16.1 oz and standard deviation of 0.5 oz.a
Which of the following is the correct interpretation for the regression coefficient of Age? The regression coefficient is not significantly different from zero.
A set of data is normally distributed with a mean of 3.5 and a standard deviation of 0.6. State whether the first area is bigger, the second area is bigger.
Table 7.28 is from a General Social Survey. Subjects were asked whether methods of birth control should be available to teenagers between the ages of 14 and 16, and how often they attend religious services.
If the population is normally distributed then the sample mean is also normally distributed even for small sample size.
a machine produces marbles of 3 different colors aqua black and canary with the corresponding probabilities pa pb pc
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