Entertainment is big business. According to pcmag. com, Americans spend more than $2.6 billion dollars on digital music each year. Video games are popular, too. Americans spend more than $24.7 billion dollars on video games and related accessories each year. Today you will investigate music downloads and usage of video games. You will make graphs, read and interpret graphs, and analyze entertainment data. You will review and apply the statistics terms and concepts you learned in this unit. As you complete the task, you will use measures of center and measures of spread to draw conclusions about a data set. As you do, you will be answering the question, “Does one’s gender or age tell us anything about their entertainment choices?” Directions: Complete each of the following tasks, reading the directions carefully as you go. You will be graded on the work you show, or your solution process, in addition to your answers. Show all of your work and answer each question as you complete the task. Type all of your work into this document so you can submit it to your teacher for a grade. You will be given partial credit based on the work you show and the completeness and accuracy of your explanations. Your teacher will give you further directions on submitting your work. You may be asked to upload the document, e-mail it to your teacher, or hand in a hard copy. Now let’s get started! Step 1: Describing and analyzing the data Sixth-grade students completed a random survey to determine how many songs each student has downloaded to his/her media player in the past two months. The data gathered is represented in the table below. a) Compute the measures of center for both the boys and girls data. Describe their differences. Use the terms mean and median to justify your answer. (3 points) b) Compute the measures of spread for the data collected for boys and girls. Describe their differences in detail using specific terms of spread. (4 points) c) Is it possible to make valid conclusions based on the data collected? (2 points) Step 2: Displaying numerical data in histograms, and describing and analyzing the data A recent study was conducted to determine the percentage of children who spend at least one hour per week playing video games. The results of the study are displayed in the histogram below. a) Analyze the shape of the data and describe it in detail. Use mathematical reasoning to justify your response. (2 points) b) Determine if the following statement is true or false: Children are typically introduced to video games between the ages of six and eight. Explain your answer using data from the graph. (2 points) c) If we knew that 500 families living in various cities were surveyed randomly to gather this data, is it possible to make a valid conclusion? (2 points) Step 3: Displaying numerical data in dot plots, and describing and analyzing the data A survey was conducted to determine how many movies were seen in one month among the 26 students in Mrs. Hampton’s sixth-grade class. The results are shown in the dot plot below. a) Calculate the measures of center for the data in the dot plot, rounding your answers to the nearest tenths place. Show how you determined your answer. (2 points) b) Are there any overall patterns in the data set? Striking deviations? Use mathematical reasoning to justify your answer. (2 points) c) Calculate the measures of spread for Mrs. Hampton’s class data. Justify your response by describing the process used to find each measure. (2 points) d) Which is a better measure of spread: range or interquartile range? Why? (2 points) e) What does the value of the mean absolute deviation tell you about the spread of the data? (2 points) **I can’t find the data for it, my teacher didn’t give it to me.

Ihave my work put down already! but my teacher have said that number 2 and 3 are messed ! ill give the highest amount of points for she said "great start on this activity! for full credit, resubmit and try again on whether mass is conserved for reactions #2 and #3, i know you got this! " conservation of mass activity worksheet instructions: observe and analyze the interactions between the substances pictured in the slide show. compare the properties of substances before and after each interaction. you will submit your completed worksheet for grading. data table on the table below, record your observations before and after the interactions and explain how mass was conserved. describe the changes in properties that prove a chemical reaction occurred. the first row is an example. 3 observations before interaction observations after interaction how was mass conserved? proof of a chemical reaction example: sugar + heat the sugar is in tiny white particles in a pile. heat is not seen but is implied by the heat source. the pile of sugar in the pot has a mass of 100 grams. there is a solid, light brown mass at the bottom of the pot. it has a mass of 100 grams. the mass of the sugar is the same in melted form as it is in solid crystal form. there was not a chemical reaction. sugar did not change composition. it only melted. melting point is a physical property, and this is a physical change. steel wool + oxygen (fire) steel wool is like a cloth but is electrical and has a mass of 6 grams, until heat is touched. when heat is applied to steel wool, heat such as batteries attract to steel wool, it starts to heat up until it is hot enough to make fire. well mass cannot be created or destroyed, it depends on the mass of a substance, i’m going to say that there is a chemical reaction because of how fire burns and reacts, if it was a stove of sugar like the example said, it only melted so its only physical change, so i consider steel wood and fire basically a chemical reaction and a change. egg + heat eggs are simple and are from chickens, some eggs can be white or brown but there is no difference, one egg is about 40 grams or more. one egg carries a substance that overweighs the egg. when the egg is cracked, the egg is weighed less than before it is weighing at at least 5 or 6. the mass of it is changed because it was originally from an egg shell that carried it, with that, the shell weighs less, and the egg is now being cooked and heated which should make the weight in general of the egg about 8 grams or 10. this would be called physical change and it would not be called a chemical change at all. water + heat water is a normal substance which can be drinkin’ or could be boiled and for all kinds of things, but lets say we have a cup of water, which is about 60 grams. if we take the water, and put it in the pot, it would still be the same amount grams because we only poured it out a cup that almost weighs the same as a pot. now lets say if we boil the water, when we boil water for too long it starts to heat up and soon evaporates into steam or smoke, so it has boiled down to about 20 – 30 grams. the water is now being heated so that means that it will boil and lessen the weight which is now 20 – 30. this would be called thermal change and it would be called a physical change because of the water evaporating. zinc is like a rock that weighs at ab out 10 grams. hydrogen chloride weighs at least 6 grams. hydrogen gets bubbly after interaction with zinc which should now weigh it at about 4 or 3 grams. they equal the same amount of mass, they are both mass products. it’s a chemical because for example, think of paint and vinegar, we all know it bubbles up and its like a volcano, so this would be called a chemical change. sodium hydroxide + copper sulfate sodium hydroxide is clear and copper sulfate is blue, they both have different weighs. blue is 57 grams and the clear one is 0 grams. the only thing that changes is that it is a different color. besides so, the sodium sulfate weighs now at 47 grams and the copper sits at 20, now that they have interacted. they equal the same after being together. i will say this is chemical change as well as chemical reactant.

Which is a logical conclusion based on the given information? a. figure abcd is a rhombus by the definition of a rhombus. b. segment ac is congruent to segment dc by cpctc. c. angle acb is congruent to angle adc by the angle-side-angle theorem. d. triangle acd is congruent to triangle cab by the hypotenuse-leg theorem.

Sasha delivers newspapers to subscribers that live within a 4 block radius of her house. sasha's house is located at point (0, -1). points a, b, c, d, and e represent the houses of some of the subscribers to the newspaper. to which houses does sasha deliver newspapers?