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An ophthalmologist reviews fundus photographs 30 patients wtth macular degeneration both before and 3 month after receiving a laser treatment. To assess the efficacy, of treatment, each patient is rated as improved, remained the same, or declined.
If, 20 patients improved, 7 declined, and 3 remained the same, assess whether or not patients undergoing this treatment are showing significant change from baseline to 3 months afterward. Report a p-value.
To test whether there is significant mean difference between two groups using independent sample t test.
P(A 1 )= .20, P(A 2 ), and P(A 3 )= .40. P(B 1 I A 1 ) = .25. P(B 1 I A 2 ) = .05. P(B 1 I A 3 )=.10. Use Bayes' theorem to determine P(A 3 I B 1 )
Computing probability values using normal distribution - Find the proportion of the observations will fall in the interval from 40 to 60?
When we move from the basic normal distribution to the sampling distribution of the mean we substitute the standard error of the mean for the standard deviation when we make the conversion to the standardized normal distribution.
What is the probability that the mean life-span of a sample of 64 randomly selected bulbs will exceed 727 hours?
The useful life of an electrical component is exponentially distributed with a mean of 2500 hours. a. What is the probability the circuit will last more than 3,000 hours.
The probability that a parolee will commit a crime while on parole is 0.68. A parole officer is in charge of 8 parolees. What is the probability that at least 7 of them will commit a crime while on parole?
Show that someone will think that the claim has more than a fifty percent chance of being true if p > q / (1 + q). Explain.
High levels of cockpit noise in an aircraft can damage the hearing of pilots who are exposed to this hazard for many hours
Comprise appropriate (BPS formatted) descriptive statistics table inferential statistics table.
A researcher wishes to estimate with 99% confidence, the proportion of adults who have high-speed Internet access. Her estimate must be accurate within 2% of the true proportion.
The frequency distribution below shows the distribution for suspended solid concentration (in PPM) in river water of 50 different waters collected in September 2011.
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