According to the Centers for Disease Control and Prevention (CDC), 19.9 million adults (aged 18 years and older) currently have asthma, and 6.2 million children (younger than 18 years old) have asthma. This represents 8.1% of adults and 8.4% of children. The George Washington University Hospital is conducting an asthma treatment study in children and needs to enroll 720 volunteers younger than 18 years old with asthma. If 4000 children show up, estimate the probability that the number of children with asthma is at least 720.
| n= | 4000 | p= | 0.0840 |
| here mean of distribution=μ=np= | 336 | ||
| and standard deviation σ=sqrt(np(1-p))= | 17.5435 | ||
| probability = | P(X>720) | = | P(Z>21.89)= | 1-P(Z<21.89)= | 1-1= | 0.0000 |
option A is correct The probability is <0.0001, therefore the probability is extremely low.
According to the Centers for Disease Control and Prevention (CDC), 19.9 million adults (aged 18 years...
A survey of 2324 adults in a certain large country aged 18 and older conducted by a reputable polling organization found that 419 have donated blood in the past two years. Complete parts (a) through (c) below. (a) Obtain a point estimate for the population proportion of adults in the country aged 18 and older who have donated blood in the past two years. (b) Verify that the requirements for constructing a confidence interval about p are satisfied. The sample _______ a simple...