Stat CH5 Study Guide Test 2024.

Stat CH5 Study Guide Test 2024. The table to the right lists probabilities for the corresponding numbers of girls in three births. What is the random variable, what are its possible values, and are its values numerical? - CORRECT ANSWER The random variable is x, which is the number of girls in three births. The possible values of x are 0, 1, 2, and 3. The values of the random value x are numerical. Is the random variable given in the accompanying table discrete or continuous? Explain. - CORRECT ANSWER The random variable given in the accompanying table is discrete because there are a finite number of values. For 100 births, P(exactly 55 girls)equals0.0485 and P(55 or more girls)equals0.184. Is 55 girls in 100 births a significantly high number of girls? Which probability is relevant to answering that question? Consider a number of girls to be significantly high if the appropriate probability is 0.05 or less. - CORRECT ANSWER The relevant probability is P(55 or more girls), so 55 girls in 100 births is not a significantly high number of girls because the relevant probability is greater than 0.05. Determine whether the value is a discrete random variable, continuous random variable, or not a random variable. a. The number of hits to a website in a day b. The number of light bulbs that burn out in the next week in a room with 17 bulbs c. The gender of college students d. The number of points scored during a basketball game e. The number of free dash throw attempts before the first shot is made f. The amount of rain in City Upper B during April - CORRECT ANSWER a. It is a discrete random variable. b. It is a discrete random variable. c. It is not a random variable. d. It is a discrete random variable. e. It is a discrete random variable. f. It is a continuous random variable. A _______ variable is a variable that has a single numerical value, determined by chance, for each outcome of a procedure. - CORRECT ANSWER A random variable is a variable that has a single numerical value, determined by chance, for each outcome of a procedure.