📊 statistics

1. Masalah: Cari median dari data nilai berikut: 70, 85, 90, 75, 80, 95, 85, 70, 80, 90. 2. Median adalah nilai tengah dari data yang sudah diurutkan.

1. **Stating the problem:** We need to find the 75th percentile (P75) of the given data set: 70, 85, 90, 75, 80, 95, 85, 70, 80, 90. 2. **Sort the data in ascending order:**

1. **Stating the problem:** We need to find the 4th quartile (D4) of the given data set, which is the value at the 4th decile position. 2. **Understanding the formula:** The formul

1. The problem asks to identify which part of the campers were young adults based on the bar chart data. 2. The age groups given are Senior citizens, Adults, Young adults, Teens, a

1. **Problem Statement:** We analyze a dataset of 52 cystic fibrosis patients with variables including PEmax (response), age, gender, height, weight, BMP, FEV1, FRC, RV, and TLC (e

1. **State the problem:** We have 73 students who started blogs. Among them, 29 write about literature and 29 write about other topics. We want to predict how many of the next 68 b

1. State the problem: The weather station recorded high temperatures for 30 days. Find the interval that contains the median temperature. 2. Recall what “median” means:

1. **State the problem:** We have temperature data recorded over 30 days, grouped into intervals with the number of days each temperature range was recorded. We need to find the in

1. **Problem:** Find the probability that $z$ is between 0.43 and 0.72 for a standard normal distribution. 2. **Formula and rules:** For a standard normal variable $z$, the probabi

1. The problem asks to draw conclusions from a percent bar graph, the percent of values in each category, and the mode. 2. A percent bar graph visually represents the percentage di

1. **State the problem:** We have a percent bar graph showing the ages of skaters using a skate park in one week with categories and their percentages. 2. **Given data:**

1. **State the problem:** We have a histogram representing the lengths of 85 animals divided into intervals with given densities. We need to find the frequency (number of animals)

1. **State the problem:** We have grouped data for monthly expenses with class intervals and frequencies. We need to calculate the median and mode expenses for 24 months. 2. **Give

1. **Problem 9a:** Given the numbers 33, 33, 66, 77, and 88, find the arithmetic mean, mode, and median. 2. **Arithmetic mean formula:**

1. **Problem Statement:** We have weekly sales data grouped into class intervals with frequencies. We need to:

1. **Problem Statement:** We have test scores of 30 students grouped into intervals with frequencies. We need to:

1. **State the problem:** We are given the net worth (in billions) of a sample of the richest people: 59, 52, 28, 26, 19, 19, 18, 17, 17, 17. We need to find the range, variance, a

1. **Problem Statement:** Find the range, variance, and standard deviation of the net worth data (in billions): 59, 52, 28, 26, 19, 19, 18, 17, 17, 17. 2. **Range:** The range is t

1. **Problem:** The random variable $X$ is normally distributed with standard deviation 25. Given $P(X < 27.5) = 0.3085$, find the mean $\mu$. 2. **Formula:** For a normal distribu

1. **Stating the problem:** We have a normal distribution $X \sim N(400, 64)$ with mean $\mu = 400$ and variance $\sigma^2 = 64$, so standard deviation $\sigma = 8$.

1. **State the problem:** We have a normal distribution $X \sim N(400,64)$ with mean $\mu=400$ and variance $\sigma^2=64$, so standard deviation $\sigma=8$. 2. We want to find valu