Cumulative Exam — Cumulative exam Answers

The scores of an eighth-grade math test have a normal distribution with a mean = 83 and a standard deviation = 5. If Din’s test score was 92, which expression would she write to find the z-score of her test score?

Priya is playing a game where she earns online badges for scoring higher than the mean score on a level. After the tenth level, she scores 3,540 points, which is 2 standard deviations above the mean score of 3,110 points.

Mr. Walker is looking at the fundraiser totals for the last five years.

Raj polled 100 students in his class to compare the number of hours that teen boys and girls played video games each week. The results of his survey are shown below. Which statement about his data sets is true?Hours of Video Game Time per Week for Teen Boys Hours of Video Game Time per Week for Teen Girls

The sizes of cans on a shelf are listed below. 18 oz, 8 oz, 16 oz, 20 oz, 20 oz, 16 oz, 12 oz, 8 ozWhat is the interquartile range of this list?

The table below shows the participation in the town soccer league during its first five seasons.Town Recreational Soccer League ParticipationYearNumber of participants188295310041085115Which is the equation of the trend line that can be generated by using the data from years 1 and 5?

What is the slope of the trend line drawn into the scatterplot?

Which characteristics describe the scatterplot? Check all that apply.

Which sample fairly represents the population? Select two options.

The scores of a high school entrance exam are approximately normally distributed with a given mean = 82.4 and standard deviation = 3.3. What percentage of the scores are between 75.8 and 89?

The means and mean absolute deviations of monthly snowfall during the winter months in two cities are shown in the table below.Means and Mean Absolute Deviations of Snowfall in North Town and South Town North TownSouth TownMean8.9 in.6.3 in.Mean Absolute Deviation0.55 in.0.48 in.The difference of the means is found and then compared to each of the mean absolute deviations. Which is true?

The College Board states that the average math SAT score is 514 with a standard deviation of 117. Colleen gathered data from 50 students in her graduating class and found the average score to be 529. She thinks that her class’s math SAT score is different from the average. Which of the following shows the correct z-statistic for this situation?

The box plots show the number of hours of television a group of middle school students and a group of elementary school students watch each week.Middle School StudentsElementary School StudentsWhich correctly compares the medians and the measures of variability of the data in the box plots? Select three choices.

The table of values below shows data for a five-word spelling test.Number of Letters vs. Percentage who Spelled CorrectlyWordNumber of letters in the wordPercentage of students who spelled the word correctly17482912357346595827Which describes how the data for word 2 should be plotted on a coordinate grid?

The histogram shows the duration, in minutes, of movies in theaters.

LaTesha and Bernard are playing a game. Their scores for five games are shown in the table below.LaTesha’s and Bernard’s ScoresLaTesha’s Scores9245673680Bernard’s Scores6368626953Which statement comparing the means to the ranges is true?

Which of the scatterplots have no correlation? Check all that apply.

A survey of pet owners found that on average, they spend $1,225 annually per pet, with a standard deviation of $275. Between which two amounts would you expect 95% of the survey’s respondents to spend annually per pet if the sample is approximately normal and comes from a normally distributed population?

The heights of the trees in a forest are normally distributed, with a mean of 25 meters and a standard deviation of 6 meters. What is the probability that a randomly selected tree in the forest has a height greater than or equal to 37 meters? Use the portion of the standard normal table given to help answer the question.zProbability0.000.50000.500.69151.000.84132.000.97723.000.9987

Madeline surveyed her classmates to find out how many pairs of shoes they own. Her data is displayed below. How many students did she include in her survey?