probability that at least 13 of them need correction for their eyesight. Is 13 a significantly high number of adults requiring eyesight​ correction?

An economics professional body estimates that 80% of the students taking undergraduate economics courses are in favour of studying of statistics as part of their studies. If this estimate is correct, what is the probability that more than 790 undergraduate economics students out of a random sample of 1000 will be in favour of studying statistics?

13 percent of the patients in a study reported previous episodes of a stroke. Use 13 percent as the estimate of the prevalence of stroke within the population. If 70 subjects are chosen at random from the population, what is the probability that 10 percent of less would report an incidence of stroke?

According to a study conducted by a statistical organization the proportion of Americans were satisfied with the way things are going in her lives .82 supposed random sample of 110 Americans is obtained. The probability that 77 or fewer Americans in the sample are satisfied is?

Approximately 10% of the population is left-handed. What is the probability that exactly two students among the 20 students in a Statistics class is left-handed?

Test whether patients getting Treatment 1 are more likely to survive, if 62 out of 82 getting Treatment 1 survive and 30 out of 66 getting Treatment 2 survive.

A survey showed that 7575​% of adults need correction​ (eyeglasses, contacts,​ surgery, etc.) for their eyesight. If 2222 adults are randomly​ selected, find the probability that no more thanno more than 11 of them need correction for their eyesight. Is 11 a significantly lowlow number of adults requiring eyesight​ correction?

What type of probability involves repeating an experiment and recording the relative frequency of the outcomes?

A survey showed that 84​% of adults need correction​ (eyeglasses, contacts,​ surgery, etc.) for their eyesight. If 16 adults are randomly​ selected, find the probability that no more than 1 of them need correction for their eyesight. Is 1 a significantly low number of adults requiring eyesight​ correction?

A traffic control engineer reports that 75% of the vehicles passing through a checkpoint are from within the state. What is the probability that fewer than 4 of the next 9 vehicles are from out of state?