Final answer:
For a survey of 22 cars in a parking garage, the expected number of cars parked crookedly is 8.25. The most common street parking is parallel parking. Exact probabilities regarding parking require additional statistical information or distributions.
Step-by-step explanation:
The most common parking on a city street is d. Parallel Parking. In terms of statistics related to parking, based on the information given, for every 22 cars surveyed in the De Anza parking garage, the expected number of cars parked crookedly can be calculated as follows:
Expected number = Total number of cars surveyed × Probability of a car being parked crookedly
= 22 × 37.5%
= 22 × 0.375
= 8.25 cars
Therefore, the correct answer is A. 8.25.
Regarding the probability that at least 10 of the 22 cars are parked crookedly, given information like a probability distribution or using a binomial probability formula would be necessary to calculate the exact likelihood. Since specific details or formulas to calculate this probability are not provided, we cannot determine the correct answer from the options given without additional statistical information.
In another parking-related statistic, it is mentioned that 70% of the time, it takes more than a certain number of minutes to find a parking space. To identify this duration, knowledge of the underlying data or results of a study related to parking times would be necessary.
Lastly, when examining parking times at 9 a.m., which follows a normal distribution with a mean of five minutes and a standard deviation of two minutes, various probabilities related to finding a parking space within this distribution can be determined using z-scores and standard normal distribution tables.