question 11

\fUsing the Venn Diagram below, what is the conditional probability of event A occurring, assuming that event B has already occurred [P(AIB)]? A B O 0.09 to 0.13 O 0.11 to 0.13 O 0.11 to 0.80 0.09 to 0.80Edwin conducted a survey to find the percentage of people in an area who smoked regularly. He defined the label \"smoking regularly\" for males smoking 30 or more cigarettes in a day and for females smoking 20 or more. Out of 635 persons who took part in the survey, 71 are labeled as people who smoke regularly. What is the 90% confidence interval for this population proportion? Answer choices are rounded to the hundredths place. Jessica uses a poorly calibrated stopwatch to note the finish time ofa relay race. She noted the time as 125 seconds, whereas the actual time taken was 120 seconds. The percent error in Jessica's calculation is O -4.2% O 4.0% O 4.0% O 4.2% Which of the following is an example of a statistic? O Fifty employees in a small business are randomly selected to take a survey. A local newspaper reporter asks 50 citizens for their opinion on a recent city ordinance. 0 All 25 students in a third grade class are asked to rank their favorite fruits. Fifty households randomly sampled in one county have a mean weekly amount spent on groceries. \fFor a set of data, x is the explanatory variable. Its mean is 8.2, and its standard deviation is 1.92. For the same set of data, y is the response variable. Its mean is 13.8, and its standard deviation is 3.03. The correlation was found to be 0.223. Select the correct slope and y-intercept for the least-squares line.Which of the following statements about the stack plot is true? 0 More girls than boys chose English as their favorite subject. 0 More boys chose math as their favorite subject than science. 0 Most of the students chose English as their favorite subject. More than half the girls chose science as their favorite subject. The school paper published the results of a survey among grade eight students with regards to their favorite subject Favorite Subject of Grade 8 Students 120 100 80 I Girls 60 I I Boys 40 Number of Students 20 0 Science Mathematics English Subject O Randomized Block Design O Matched-Pair Design O Completely Randomized Design O Case-Control DesignA new pet food product for small dogs has been developed to help with tooth decay. Fifty-two dogs participate in the study. Each dog owner picks a card from a standard deck out ofa hat. If the card is red, their dog will be in the treatment group. Ifthe card is black, their dog will be in the placebo group. Which experimental design was used? O The weight of a baby decreases by 17 pounds, on average, when the baby's age increases by 1 month. O The weight of a baby increases by 17 pounds, on average, when the baby's age increases by 1 month. O The weight of a baby decreases by 0.8 pounds, on average, when the baby's age increases by 1 month. O The weight of a baby increases by 0.8 pounds, on average, when the baby's age increases by 1 month.Data for weight (in pounds) and age (in months) of babies is entered into a statistics software package and results in a regression equation of}? =17 + 0.8x. What is the correct interpretation of the slope if the weight is the response variable and the age is the explanatory variable? In a poll of 300 preschoolers, 125 said they preferred chocolate ice cream, 71 said they preferred vanilla, 100 said they preferred cookies & cream, and 4 said they had never eaten ice cream. If a pie chart were to be made showing the preference for each flavor, the central angle for the chocolate ice cream sector would be 0 124 0 41 0 150 O Rejecting the mean weight of each cake as 500 grams when Ho = 500. O Failing to reject the mean weight of each cake as 500 grams when Ho