📊 statistics

1. **State the problem:** Match each Z-score with its corresponding cumulative probability (area under the standard normal curve to the left of the Z-score). 2. **Recall the standa

1. The problem asks to find the area $P(Z < -1)$ where $Z$ is a standard normal random variable. 2. For a standard normal distribution, $Z$ has mean 0 and standard deviation 1.

1. **State the problem:** We have a normal distribution with mean $\mu = 20$ and standard deviation $\sigma = 5$. We want to find the probability $P(15 < x < 25)$. 2. **Formula and

1. The problem asks us to analyze a circle graph (pie chart) showing favorite pet types in a community. 2. (a) We need to find which category corresponds to approximately one-fourt

1. The problem asks us to analyze a circle graph (pie chart) showing students' favorite colors: Blue, Red, Pink, Other, Green, and Purple. 2. (a) We need to find which color was ch

1. **State the problem:** We have 710 high school seniors surveyed about owning automobiles and motorcycles. 2. **Given data:**

1. **State the problem:** We are testing the fairness of a coin with null hypothesis $H_0: p=0.5$ where $p$ is the probability of heads. 2. **Random variable:** $X \sim \text{Binom

1. **State the problem:** We are given data about the number of snacks and their corresponding points, along with averages and standard deviations. We want to understand how to cal

1. **State the problem:** We have a stem-and-leaf plot showing video views per minute, with stems as tens digits and leaves as units digits. 2. **Given data:** The original plot sh

1. **Stating the problem:** We are given a stem-and-leaf plot representing the number of video views each minute. The stems represent the tens place, and the leaves represent the o

1. **Stating the problem:** We are asked if the ACT scores for students at ACT Academy come from a normal distribution, given the data about Test Prep Extreme and ACT Academy score

1. **Problem statement:** We have two bar charts showing the number of books read by Year 13 students and the types of books read. We need to find: a) The median number of books re

1. **State the problem:** We have a data set representing the number of pets owned by people: $0, 3, 6, 9, 12, 15$. We need to find:

1. The problem involves interpreting two dot plots representing the number of hours students spent studying. 2. Dot plot A shows most students studying about 1 hour per night, with

1. **State the problem:** We need to find the median and the interquartile range (IQR) for the Hawks data set. 2. **Recall definitions:**

1. **Stating the problem:** We are given a frequency distribution table showing the times (in minutes) it took 29 sixth-grade students to complete a math quiz. We want to understan

1. The problem asks to create a histogram for the given frequency distribution of quiz times for 29 students. 2. A histogram is a bar graph representing the frequency of data inter

1. **State the problem:** We need to find the median number of customers in the store during the flash sale from the data set: 168, 157, 143, 168, 150, 140, 148, 148, 140, 150. 2.

1. **State the problem:** We want to find the probability that a randomly chosen resident aged 40 or older has completed only high school or just some college. 2. **Identify the re

1. The problem asks: What percent of the time did Trent spend at least 80 minutes on homework? 2. From the data points given: 20, 40, 60, 80, 100, 120 minutes, we want to find the

1. The problem asks to find the class boundaries for the class interval 5 – 15. 2. Class boundaries are the values that separate classes without gaps, usually found by averaging th