# Question: Based on past history a fire station reports that 25

Based on past history, a fire station reports that 25% of the calls to the station are false alarms, 60% are for small fires that can be handled by station personnel without outside assistance, and 15% are for major fires that require outside help.

a. Construct a relative frequency bar chart that represents the distribution of the variable x = type of call, where type of call has three categories: false alarm, small fire, and major fire. What is the underlying population for this variable?

b. Based on the given information, we can write P(x 5 false alarm) = .25. Use the other two relative frequencies shown in the bar chart from Part (a) to write two other probability statements.

a. Construct a relative frequency bar chart that represents the distribution of the variable x = type of call, where type of call has three categories: false alarm, small fire, and major fire. What is the underlying population for this variable?

b. Based on the given information, we can write P(x 5 false alarm) = .25. Use the other two relative frequencies shown in the bar chart from Part (a) to write two other probability statements.

**View Solution:**## Answer to relevant Questions

Consider the following 10 observations on the lifetime (in hours) for a certain type of component: Construct a normal probability plot, and comment on the plausibility of a normal distribution as a model for component ...A machine producing vitamin E capsules operates in such a way that the distribution of x = actual amount of vitamin E in a capsule can be modeled by a normal curve with a mean of = mg and standard deviation 0.05 mg. What is ...Let x denote the systolic blood pressure of an individual selected at random from a certain population. Suppose that the normal distribution with mean m 5 120 mm Hg and standard deviation σ = 10 mm Hg is a reasonable model ...The time that a randomly selected individual waits for an elevator in an office building has a uniform distribution over the interval from 0 to 1 minute. For this distribution m 5 0.5 and s 5 0.289. a. Let x be the sample ...c. Referring to Part (b), what is the probability that a sample mean will be outside 2 +- 3sx just by chance (that is, when there are no unusual circumstances)? d. Suppose that a machine used to apply the coating is out of ...Post your question