📊 statistics

1. The problem asks to find the median number of cookies made by 21 people based on the frequency table. 2. The frequency table is:

1. The problem asks for the modal monthly salary, which is the salary that appears most frequently among the employees. 2. From the table, the number of employees for each salary i

1. **State the problem:** We have scores 4, 5, 6, 7, 8 with frequencies 2, 3, 9, b, and 1 respectively. The mean score is 6. We need to find the value of b. 2. **Recall the formula

1. The problem asks to find the number of defective motors produced by each production team given the total motors produced and the defect percentages. 2. We are given:

1. The problem asks which production team made the most motors without defects. 2. We are given the total motors produced by each team and the percentage of defective motors for ea

1. The problem is to compute step-by-step the data points provided and prepare them for a line graph. 2. First, list all the numbers as data points: 27, 79, 69, 40, 51, 88, 55, 48,

1. The problem involves interpreting regression coefficients from a table related to warehouse efficiency. 2. Each variable (A, B-med, B-high, C, D, E-low, E-med, F) has an associa

1. The t-formula is commonly used in statistics to calculate the t-statistic for hypothesis testing or confidence intervals. 2. The general formula for the t-statistic is:

1. **State the problem:** We need to construct a grouped frequency distribution and find the frequency and relative frequency of each class for the given data set of 80 students' l

1. **State the problem:** We need to construct a grouped frequency distribution for the leisure hours data of 80 college students using intervals suggested by the number line: 10-1

1. **State the problem:** We need to construct a grouped frequency distribution for the leisure time data of 80 college students, then find the frequency and relative frequency for

1. **State the problem:** We need to construct a grouped frequency distribution for the given data representing hours spent on leisure activities by 80 college students. Then find

1. Problem statement: How many signals (sample size $n$) are needed so that a level 0.05 test of $H_0: \mu=10$ has at least 80% chance of rejection when the true mean is 11.2? 2. A

1. **State the problem:** We want to find the sample size $n$ needed for a hypothesis test of $H_0: \mu = 10$ against an alternative where the true mean is $11.2$, with a significa

1. **State the problem:** We are given 10 values with the sum of their squares as 390 and the sum of the values as $10\sqrt{14}$. We need to find the standard deviation of these va

1. **State the problem:** We need to construct a grouped frequency distribution for the leisure time (in hours) of 80 college students. 2. **Organize the data:** The data ranges fr

1. **State the problem:** We have a poll with a sample size $n=2030$ and a reported margin of error (MOE) of 2 percentage points (0.02) at a 95% confidence level. We want to determ

1. **Prove the rank correlation coefficient formula:** The rank correlation coefficient $R$ is given by:

1. **Prove the rank correlation coefficient formula:** The rank correlation coefficient $R$ is given by:

1. **Problem 1: Variance of sample distributions** Given population $S = \{1, 2, 3, 4, 5\}$, population size $N=5$, sample size $n=2$.

1. প্রশ্ন: ১০টি তথ্যের জন্য সংসম্পকের নির্দেশক করণ। 2. দেওয়া তথ্য: $\sum x=700$, $\sum y=900$, $\sum xy=66900$, $\sum y^2=87360$, $\sum x^2=51868$, $n=10$।