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Stephanie scored 88, 70, 84, and 72 on her first four science tests. What score does Stephanie need on her fifth science test to receive a mean score of 80? A spinner is divided into 8 equal sections as shown below. What is the theoretical probability that the arrow will not land on a section labeled E or O? Enter your answer in decimal form to the nearest thousandth. 0. The test scores for two classes are shown below. What is the difference between the ranges of the scores for class A and class B? Alexis advertised that 25 percent of the cars that she sold were red. Which of these could not be used to simulate the number of red cars that Alexis sold? Spin a spinner with 4 equally-sized sections. Draw a card from a deck of cards numbered 1 through 24. Toss a fair coin once. Use a random number generator to generate the digits 1 through 8. The table below shows the number of people on the boards of directors of 23 companies. What is the median number of people on the boards of directors of these 23 companies? The growing season of a major city is defined as the average number of days between the last frost in the spring and the first frost of the fall. Study the table below showing the average growing seasons of thirty major U.S. cities. If the circled number 279 is changed to 179, how would the mode of this data change? mode would not change mode would decrease from 213 to 210 mode would decrease from 196 to 193 there would be two modes: 156 and 179 Number all students in the school, and randomly select the numbers of 40 students. Javier wants to collect data about the number of hours students in his school exercise each week. Based on the principles of simple random sampling, which of these is the best method for Javier to collect his data? Randomly select 20 students from both the girls’ and boys’ soccer teams. Randomly select 10 freshmen, 10 sophomores, 10 juniors, and 10 seniors. Choose any 3 buses, and randomly select a total of 40 students from those buses. Enter your answer in decimal form to the nearest hundredth. A fish tank at a pet store has 3 red fish, 6 blue fish, 7 yellow fish, and 4 orange fish. If one fish is chosen at random from the tank, what is the probability that the fish will be blue or yellow? 0. Assign a different number to each student, and select 30 students using a random number generator. A school wants to conduct a survey of its 1200 students to decide on a school song. Based on the principles of simple random sampling, which of these is the best method for the school to use to conduct its survey? Assign a different number to each student whose age is 16 years or older, and select 30 students using a random number generator. Assign a different number to each student who has been at the school for at least one year and select 30 students using a random number generator. Assign a different number to each student, and select 15 males and 15 females using a random number generator. A television station will conduct a survey to determine the most popular television show in its viewing area. Which of these methods provides the most representative sample? Survey 50 randomly selected people who enter the television station. Survey 50 randomly selected residents in its viewing area. Survey 50 randomly selected residents from the local telephone book. Survey 50 randomly selected people who leave a video rental store. There are coconut, caramel, and fudge candy in a box. Kevin uses a random number generator to simulate choosing one piece of candy. The table below shows the assignment of digits to the types of candy. Kevin ran the simulation 20 times. The results are shown below:
5 1 0 4 4 3 6 2 9 8 7 4 5 6 8 1 6 3 6 5
Based on the results of the simulation, what is the probability that a randomly selected piece of candy is a coconut candy? 8/20 10/20 14/20 6/20 The test scores of 8 students are listed in the table. Which students’ scores would fall above the third quartile? Rhonda and Abe Steve and Daniel Melanie and Nate Abe and Steve |