4. COMPUTER CHIPS. For a certain type of computer chip, the proportion of chips that are defective is 0.10. A computer manufacturer receives a shipment of 200 chips. a. Is it appropriate to use the normal distribution to find probabilities for p? b. What is the probability that the proportion of defective chips in the shipment is between 0.08 and 0.15? c. Would it be unusual for the proportion of defective ships to be less than 0.075?

6.12, please

Find the probability that the proportion of the sampled adults who drink coffee daily is between .57 and .63

According to Reader's Digest, 37% of primary care doctors think their patients receive unnecessary medical care. Use the z-table. a. Suppose a sample of 390 primary care doctors was taken. Show the sampling distribution of the proportion of the doctors who think their patients receive unnecessary medical care. E(p) .37 (to 2 decimals) .0227 (to 4 decimals) b. What is the probability that the sample proportion will be within ±0.03 of the population proportion? Round your answer to four decimals. c. What is the probability that the sample proportion will be within ±0.05 of the population proportion? Round your answer to four decimals. d. What would be the effect of taking a larger sample on the probabilities in parts (b) and (c)? Why? The probabilities would - Select your answer - This is because the increase in the sample size makes the standard error, o Select your answer -

2. An actuary studied the likelihood that diff rent types of drivers would be involved in at least one collision during any one-year period. The results of the study are presented below. Probability of at least one Туре of driver Percentage of all drivers collision Teen 8% 0.15 Young adult Midlife 16% 0.08 45% 0.04 Senior 31% 0.05 Given that a driver has been involved in at least one collision in the past year, what is the probability that the driver is a young adult driver?

In a recent year, a fact sheet for the state of Pennsylvania stated that 72.6% of all public high school seniors were planning to attend college the next year. If an SRS of 400 public high school seniors in Pennsylvania were surveyed, what is the probability that the sample proportion who are going to college next year will be within 3 percentage points of the true value? a. mean  b. standard devaition  c. large count condition d. Using table A