📊 statistics

1. **نص السؤال:** إذا كانت العلامة المعيارية المناظرة لخمسة قيم هي 0.5، ك، 0، -0.5، 1.5 فما هي قيمة ك؟ 2. **مفهوم العلامة المعيارية:** العلامة المعيارية (Z-score) تمثل عدد الانحراف

1. **Problem:** Given the standard scores (z-scores) for five values are 0.5, k, 0, -0.5, and 1.5, find the value of k. 2. **Formula and rule:** The sum of all standard scores (z-s

1. **Stating the problem:** We are given a tally and frequency table for shirt colors. The tally for "Plain" shirts is missing, and the frequency number for "Plain" shirts is also

1. **State the problem:** We need to find the probability that when one student is chosen at random from Group A and one from Group B, one student is above 160 cm and the other is

1. **State the problem:** We are given a frequency table with intervals and their corresponding frequencies. We need to identify the correct histogram that represents this data. 2.

1. The problem is to choose the correct histogram for the given frequency table. 2. The frequency table is:

1. **State the problem:** We have data for 10 students showing their 10km run times (in minutes) and weekly hours spent playing sport. We need to plot the last 5 points, draw a lin

1. **Stating the problem:** We have a dataset of companies with their compensation in millions of dollars and their stock return percentages. We want to analyze the relationship be

1. The problem asks why it does not make sense to find the least-squares regression line for the given data of total compensation and stock performance for 12 CEOs. 2. The least-sq

1. **Stating the problem:** We have a multiple linear regression problem with three independent variables: UTS (X1), UAS (X2), and Membolos (X3), and one dependent variable: Nilai

1. **Problem Statement:** Calculate Mike Trout's hitting percentages for hits, runs, and home runs from the 2020 season based on 200 at bats. 2. **Formula:** Percentage = \( \frac{

1. **Problema:** determinar o intervalo que contém o percentil $60$ dos dados do histograma, ou seja, o valor $P_{60}$ do número de tempestades tropicais por ano. 2. **Regra usada

1. **Problem statement:** We analyze the conversion rate (TC) data from various graphical representations to answer four questions. 2. **Maximum value in dot plot:** The highest po

1. O problema pede para analisar três distribuições normais DN1(μ1; σ1), DN2(μ2; σ2) e DN3(μ3; σ3) apenas pela análise gráfica, sem cálculos, e selecionar as afirmações verdadeiras

1. **State the problem:** We need to estimate the weight of a dog that is 90 cm tall using the line of best fit from a scatter plot of dog heights and weights. 2. **Formula and exp

1. **State the problem:** Find the mean (average) of Victor Wembanyama's NBA Finals blocks per game given the scores: 3, 4, 3, 5. 2. **Formula for mean:** The mean of a set of numb

1. **State the problem:** Calculate the mean for the given frequency tables without using a calculator. 2. **Formula for mean of frequency distribution:**

1. **State the problem:** We need to find the standard deviation of the number of cell phones sold from Monday to Friday, given the data: 20, 21, 22, 30, 32. 2. **Formula for stand

1. The problem asks to describe the interquartile ranges (IQR) of male and female grades in a math class based on box plots. 2. The interquartile range is the difference between th

1. The problem asks to analyze the interquartile ranges (IQR) of male and female grades from the box plots. 2. The interquartile range (IQR) is the difference between the third qua

1. **Problem:** Find the interquartile range (IQR) of the number of viewers over 9 days: 50, 42, 66, 120, 48, 170, 110, 40, 35. 2. **Step 1: Sort the data in ascending order:**