A school librarian is investigating whether children from lower socioeconomic neighborhoods sign out a different number of books than do children from higher socioeconomic neighborhoods. What are the IV and DV in this study?
Independent variable: Type of Neighborhood (Lower socioeconomic neighborhoods, Higher socioeconomic neighborhoods)
Dependent variable: Number of books the children sign out
A school librarian is investigating whether children from lower socioeconomic neighborhoods sign out a different number...
A school counselor in a high school would like to try out a new conflict-resolution program to change aggressiveness in students. She first surveyed 16 students using a 20-item instrument to measure their levels of aggression (on a scale of 0 to 10, with higher numbers meaning higher aggression levels). One month after the conflict resolution program was implemented, the students were given the same survey. The data are listed in the table below. The school counselor/researcher has set the...
A public school system wanted to know whether the reading levels of the students at two of its schools were different. The study that was conducted tested an enormous number of students, and concluded that students attending School A scored significantly higher than those attending School B. However, the difference between the means of the two schools was very small. What should you conclude regarding the difference in reading levels between the two schools? Explain your conclusion. Write your answer...
Do education programs for preschool children that follow the Montessori method perform better than other programs? A study compared five-year-old children in Milwaukee, Wisconsin, who had been enrolled in preschool programs from the age of three. All the children in the study applied to the Montessori school. The school district assigned students to Montessori or other preschools by a random lottery. (a) Comparing children whose parents chose a Montessori school with children of other parents would not show whether Montessori...
Children and teenagers spend more than 7 hours a day with a variety of different media. Television predominates, with more than 4 hours a day of screen time, although viewing may now be via a computer or a cell phone screen instead of a TV set. Media use represents the leading leisure time activity for young people—they spend more time with media than they do in any other activity except sleeping. Increasingly, preteens and teens are using new technologies (social...
part 1. A commonly cited standard for one-way length (duration) of school bus rides for elementary school children is 30 minutes. A local government office in a rural area conducts a study to determine if elementary schoolers in their district have a longer average one-way commute time. If they determine that the average commute time of students in their district is significantly higher than the commonly cited standard they will invest in increasing the number of school busses to help...
Assume that any student has a 25% chance of getting into a certain college. Let the random variable X denote the number of students (from a total of 5 students who apply) who get into the school. For the following problems do not use calculator commands. a. What are the parameters n and p for the distribution? b. What is the expected number of students (out of the 5) who will be accepted to the school? c. Find the standard...
The table contains the data from an urban school district on the number of eighth‑grade students with three or more unexcused absences from school during each month of a school year. Because the total number of eighth‑graders changes a bit from month to month, these totals are also given for each month. Sept. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May June Students 811 847 839 842 818 820 831 825 802 783 Absent 251 309 324 295 261 282...
6. As the contributions of money from state and local governments to public school sys- tems has decreased school systems have become more dependent on raising money through the ballot with millages. The biggest roadblock to these efforts is resistance from the public (and, all too often, outside groups who don't have any local interest in the schools). One local school system tried to get millage passed in 2016, but opposition of 52% of the area residents prevented its passage...
AS11ER2 AD3E62E60465... Reliance on solid biomass fuel for cooking and heating exposes many children from developing countries to high levels of indoor air pollution. An article presented information on various pulmonary characteristics in samples of children whose households in India used either biomass fuel or liquefied petroleum gas (LPG). For the 754 children in biomass households, the sample mean peak expiratory flow (a person's maadimum speed of expiration) was 3.8 US, and the sample standard deviation was 1.2. For the...
Read the following abstract: Previous research has shown that ostracism even by outgroup members is aversive. In this study we examined whether ostracism by a particular type of outgroup, a despised outgroup, was sufficient to inflict emotional distress. We manipulated ostracism using Cyberball, an on-line ball toss game. Ostracized participants reported lower levels of belonging, self-esteem, control, and meaningful existence, and more negative mood, than included participants. Moreover, ostracism by despised outgroup members was no less aversive than ostracism by...