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British scientists have developed a 15 minute brain scan they hope could be used to detect autism in children. Autism and related disorders affect up to 7 out of every 1000 individuals. The brain scan method was 90% accurate in correctly identifying the autistic patients.It also showed a negative result for healthy controls in 80% of cases. If a child tested positive for autism,what is the probability that he indeed has autism?
Pick the option CLOSEST TO THE ANSWER:
(a) 0.9 (b) 0.7 (c) 0.5 (d) 0.3 (e) 0.1
One environmental group did a study of recycling habits in a California community. It found that 73% of the aluminum cans sold in the area were recycled. (Round your answers to four decimal places.)
Produce the scatter plot for sodium and bp. Do you think there are any outliers?
2 to every even-numbered card, with aces being 1s. Determine the frequencies of 0, 1, and 2. Use SPSS to get the value of test statistic and p-value.
If Kim expects to use phone for 21 hours per month, which plan must she choose?
Suppose you had flipped a fair coin 19 times and "tails" had come up each time. The probability of now tossing a "head" on the 20th flip would then be:
What is the mean and standard deviation of the number preferring the incumbent and what is the probability that more than 68% will favor the incumbent?
If the packets are sold in multi-packs containing six packets, what is the distribution of the number of prizes in a randomly chosen multi-pack?
In order to test the assumption of a Poisson distribution, a random sample of 150 ten-minute intervals was taken.
From her district, consisting of several hundred stores, she selects a random sample of 30 stores. For each store she gathered the following information.
The mathematics SAT scores of the seven students in a mathematics seminar are 533, 553, 578, 586, 619, 626, and 633. Suppose that the student with the score of 533 drops the seminar and is replaced by a student with a score of 765.
An experiment was performed to investigate lifetime of a component exposed to high heat. Three different oven types were used at either 550°F or 600°F.
A random sample of 100 students at Southern University was collected. The mean age was found to be 24.2 years, with a standard deviation of 3.4 years.
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