Chapter 5
The probability of event A is 0.35. The probability of event B is 0.45. If events A and B are independent, then P (A and B) is ...
0.6425
A survey found that in a small town, 65% of households had 0 pets, 17% of households had 1 pet, 8% of households had 2 pets, and 10% of households had 3 pets. Calculate the expected value of the number of pets in a household.
0.63
The distribution of speeds for vehicles on a particular highway is normal with a mean of 67 mph and a standard deviation of 4 mph. According to the Empirical Rule, what percentage of speeds will fall between 63 and 75 mph?
81.5%
What was the original purpose of Hardy Tower?
To store and supply water for the campus.
Suppose the probability of event A is 0.35 and the probability of event B is 0.50. If events A and B are independent, then P (A or B) is ...
0.675
According to the State Department, only twenty-seven percent of Americans carry a valid passport. Suppose we take a random sample of 11 Americans. Which of the following best describes the distribution of X = the number of Americans that carry a valid passport?
X ~ B (11, 0.27)
Heights of women ages 20-29 follow a normal distribution with a mean height of 64 inches and a standard deviation of 2.7 inches. What is the probability a randomly selected woman is shorter than 60 inches?
0.0694
In which year did San Diego State College become San Diego State University?
1974
Suppose 58% of college students attend college full time and 63% have part time jobs. 45% of the students who attend full time have part-time jobs. What is the probability a student selected at random both attends college full time and has a part-time job?
0.261
Suppose that 25% of American adults meet the Surgeon General's recommendation for the daily physical activity. If a random smaple of 10 American adults is taken, what are the mean and standard deviation of the number that meet the Surgeon General's recommendation?
Mean: 2.5 & S.D: 1.3693
It is know that IQ test scores are normally distributed with a mean score of 100 and a standard deviation of 16. What is the value of the 79th percentile of the distribution?
112.96
What former SDSU basketball player recently won the NBA title in 2019 with the Toronto Raptors?
Kawhi Leonard
Suppose that 13% of people in the U.S. are senior citizens (65 years old or older). 22% of people in the U.S. get the flu each year. It is know that 14% of senior citizens get the flu each year. Find the probability that a randomly selected person is a senior citizen and will get the flu this year.
0.0182
The mortality rate for a certain disease is 30%. A random sample of ten patients with this disease is selected. What is the probability that exactly half of the patients selected will die from the disease?
0.1029
A survey of U.S. adults found that 76% would pay more for an environmentally friendly product. A random sample of 175 adults is selected. What is the probability that more than 125 say they would pay more for an environmentally friendly product?
0.9222
Which SDSU alumna has clocked the most miles traveled?
Ellen Ochoa (first female Latina astronaut in space)
Assume the probability of a student receiving an athletic scholarship is 0.25 (event A). The probability of a student receiving a merit scholarship is 0.27 (event B). The probability of the getting the merit scholarship if he is awarded the athletic scholarship is 0.62. What is the probability he is awarded both the merit and athletic scholarship?
0.155
A recent study indicated that 67% of U.S. adults consider air conditioning a necessity. If a random sample of 14 U.S. adults is selected, what is the probability at least 12 of the 14 consider air conditioning a necessity?
0.1101
A study found that the amount of money a U.S. adult spends on food in a week is normally distributed with a standard deviation of $51. What is the mean amount spent per week if only 8.5% of adults spend more than $220 per week?
$150.13
What SDSU athlete was drafted by both the San Diego Padres and San Diego Clippers in 1981?
Tony Gwynn