DATA AND STATISTICS HOMEWORK

Below is data collected from a random sample of 80 students regarding their fitness habits. If the entire school has 600 students, then what is a reasonable estimate for the number of students who consider themselves to have an average fitness habit?

• 175

• 120

• 280

• 330

The number of teachers from two different schools are shown below. The school district would like to survey staff members about the school dress code. Based on the data, which of the samples below would be considered random?

• All of the teachers at North MS are sampled.

• The seventh grade teachers at North MS and West MS are sampled.

• The teachers are alphabetized by last name and every fifth teacher is sampled.

• The teachers who attend the school board meeting are sampled.

The number of patients at a doctors office is tracked over a period of 10 days. Which statement best supports the data?

• The data for Dr. Amine’s office is more symmetrical than the data for Dr. Harris’s office.

• The interquartile range of the two offices is the same.

• The median number of patients at Dr. Harris’s office is less than the median number of patients at Dr. Amine’s office.

• The range of the data for Dr. Harris’s office is less than the range of the data for Dr. Amine’s office.

The dot plot below represents the number of dollars in allowance that students receive each week in Mrs. Jimenez's class. What is the median amount of allowance?

• 5

• 6

• 7

• 8

Twenty students in Mr. Martin’s class each took a survey about the number of minutes they played outside. The box plots represent the amount of time the students spent outside playing in the summer and in the winter. Which statement is best supported by the data?

• The range of number of minutes outside is the same in the summer and in the winter.

• The median number of minutes outside in the summer is equal to the maximum number of minutes outside in the winter.

• The interquartile range for the number of minutes outside is the same in the summer and in the winter.

• The minimum number of minutes outside in the summer is the same as the first quartile in the winter.

The average number of hours of sleep of Ms. Gambino’s and Mr. Joe’s classes is shown below. Which of the following statements is best supported by the data?

• The median number of hours slept in Ms. Gambino’s class is less than the median number of hours in Mr. Joe’s class.

• The data for Ms. Gambino’s class is symmetrical, while the data for Mr. Joe’s class is skewed right.

• The range of data in Mr. Joe’s class is less than the range of data is Ms. Gambino’s class.

• The mode of the data in Ms. Gambino’s class was equal to the mode of the data in Mr. Joe’s class.

Which of the following groups is NOT considered a sample of the US population?

• Women who live in the US

• People who are registered to vote in the US

• Europeans who vacation in the US

• Students who attend public schools in the US

A local bank polls every twentieth customer to determine if they are satisfied with the helpfulness of the bank. Forty customers are surveyed and 26 are satisfied. What conclusion can be drawn for the 800 daily customers?

• 65% of the customers are unsatisfied with the helpfulness of the bank

• 26% of the customers are unsatisfied with the helpfulness of the bank

• 40% of the customers are satisfied with the helpfulness of the bank

• Of the 800 customers, 520 would be satisfied with the helpfulness of the bank