The distribution of ages of a sample of CEOS is as follows (From USA Today): Age Frequency 21-30 3 31-40 13 41-50 26 51-60 34 61-70 23 71-up 11 If a CEO is selected at random, find the probability that his or her age is: a) between 31 and 40 b) under 41 I c) over 30 and under 51

A box contains the following tickets: 1, 1, 1, 1, 2, 2, 3, 3. Which of the plots below represents the probability histogram for a single draw from this box?   (a) (b) (c)

Question content area top left Part 1 Use the accompanying bar​ graph, which shows the highest level of education received by employees of a​ company, to find the probability that the highest level of education for an employee chosen at random is a doctoratea doctorate.   ...   Question content area top right Part 1 A bar graph titled Level of Education has a horizontal axis labeled Doctoral, Master's, Bachelor's, Associate's, High School diploma, and Other and a vertical axis labeled Number of employees from 0 to 40 in increments of 5. There are vertical bars, each of which is over a horizontal axis label. The heights of the bars are as follows, where the horizontal axis label is listed first and the height is listed second: Doctoral, 2; Master's, 25; Bachelor's, 32; Associate's, 24; High School diploma, 4; Other, 1. Each bar is labeled with its height. Level of education ABCDEF010203040Number of employeesA:DoctoralB:Master'sC:Bachelor'sD:Associate'sE:High School…

A random sample of adults was asked about their highest education level completed. The distribution of results is shown in the table.   What is the probability that the highest level of education of an adult is a high school diploma, given that they have completed at least one of the education levels shown? 0.04 0.16 0.47 0.84

Hospital visits: According to a health agency, there were 409,689 hosital visits for asthma-related illnesses in a recent year. The age distribution was as follows. Round your answers to four decimal places if necessary. Age Range Less than 1 year 1-17 18-44 45-64 65-84 85 and up Total Send data to Excel Part 1 of 3 (a) What is the probability that an asthma patient is between 18 and 44 years old? The probability that an asthma patient is between 18 and 44 years old is 0.1944 Part 2 of 3 (b) What is the probability than an asthma patient is less than 1 year old? The probability that an asthma patient is less than 1 year old is 0.0192 Part: 2/3 Number 7862 103,032 79,653 121,731 80,658 16,753 409,689 Part 3 of 3 (c) Using a cutoff of 0.05, is it unusual for an asthma patient to be 85 years old or older? Based on a cutoff of 0.05, it (Choose one) unusual for an asthma patient to be 85 years old or older. is is not X

Suppose that Melanie is a researcher who wishes to estimate the mean birthweight of full-term babies in her hospital. What is the minimum number of babies should she sample if she wishes to be at least 90% confident that the mean birthweight of the sample is within 225 grams of the the mean birthweight of all babies? Assume that the distribution of birthweights at her hospital is normal with a standard deviation of 600 g.

The following table shows the distribution of murders by type of weapon for murder cases in a particular country over the past 12 years. Complete parts (a) Handgun through (e). Weapon Probability 0.478 Rifle 0.023 Shotgun Unknown firearm Knives Hands, fists, etc. Other 0.034 0.145 0.135 0.056 0.129

A recent study gave the information shown in the table about ages of children receiving toys. The percentages represent all toys sold. Age (years) Percentage of Toys 2 and under3-56-910-1213 and over 17%18%26%10%29% What is the probability that a toy is purchased for someone in the following age ranges? (a) 6 years old or older  %(b) 12 years old or younger %(c) between 6 and 12 years old %(d) between 3 and 9 years old %A child between 10 and 12 years old looks at this probability distribution and asks, "Why are people more likely to buy toys for kids older than I am (13 and over) than for kids in my age group (10–12)?" How would you respond? The 13-and-older category may include children up to 17 or 18 years old. This is a larger category.The 13-and-older category may include children up to 17 or 18 years old. This is a smaller category.

If a graph represents a probability distribution, then the total area under the curve is what?