Vaitybharati's repositories
Assignment-1-Q24-Basic-Statistics-Level-1-
Q 24) A Government company claims that an average light bulb lasts 270 days. A researcher randomly selects 18 bulbs for testing. The sampled bulbs last an average of 260 days, with a standard deviation of 90 days. If the CEO's claim were true, what is the probability that 18 randomly selected bulbs would have an average life of no more than 260 days
Assignment-1-Q23-Basic-Statistics-Level-1-
Q 23) Calculate the t scores of 95% confidence interval, 96% confidence interval, 99% confidence interval for sample size of 25
Assignment-1-Q9_a-Basic-Statistics-Level-1-
Q9) Calculate Skewness, Kurtosis & draw inferences on the following data Cars speed and distance Use Q9_a.csv
Assignment-2-Set1-Q1-Basic-Statistic-Level-2-
Plot the data, find the outliers and find out μ,σ,σ^2
Assignment-1-Q11-Basic-Statistics-Level-1-
Q11) Suppose we want to estimate the average weight of an adult male in Mexico. We draw a random sample of 2,000 men from a population of 3,000,000 men and weigh them. We find that the average person in our sample weighs 200 pounds, and the standard deviation of the sample is 30 pounds. Calculate 94%,98%,96% confidence interval?
Assignment-1-Q12-Basic-Statistics-Level-1-
Below are the scores obtained by a student in tests 34,36,36,38,38,39,39,40,40,41,41,41,41,42,42,45,49,56. Find mean, median, variance, standard deviation. What can we say about the student marks?
Assignment-1-Q21_a-Basic-Statistics-Level-1-
Q 21) Check whether the data follows normal distribution a) Check whether the MPG of Cars follows Normal Distribution
Assignment-1-Q21_b-Basic-Statistics-Level-1-
Check Whether the Adipose Tissue (AT) and Waist Circumference(Waist) from wc-at data set follows Normal Distribution
Assignment-1-Q22-Basic-Statistics-Level-1-
Q 22) Calculate the Z scores of 90% confidence interval,94% confidence interval, 60% confidence interval for Adipose Tissue (AT) and Waist Circumference(Waist) from wc-at data set
Assignment-1-Q7-Basic-Statistics-Level-1-
Q7) For Points,Score,Weigh: Find Mean, Median, Mode, Variance, Standard Deviation, and Range and also Comment about the values/ Draw some inferences. Use Q7.csv file
Assignment-1-Q9_b-Basic-Statistics-Level-1-
Q9) Calculate Skewness, Kurtosis & draw inferences on the following data SP and Weight(WT) Use Q9_b.csv
A14-Aczel-problems-practice-1-76-1-77-
The following table shows changes in bad loans and in provisions for bad loans, from 2005 to 2006, for 19 lending institutions. Verify the reported averages, and find the medians. Which measure is more meaningful, in your opinion? Also find the standard deviation and identify outliers for change in bad loans and change in provision for bad loans
A15-Aczel-problems-practice-1-78-1-79-
Solution to Aczel problems practice (1-78, 1-79)
A16-Aczel-problems-practice-1-80-1-81-
The future Euroyen is the price of the Japanese yen as traded in the European futures market. The following are 30-day Euroyen prices on an index from 0 to 100%. Find mean, variance, standard deviation and the median.
A17-Aczel-problems-practice-1-82-1-83-
Solution to Aczel problems practice (1-82, 1-83)
A6-Aczel-problems-practice-1-24-1-25-1-26-1-27-
24. TABLE 1–1 Boston Condominium Data Asking_Price Number_of_Bedrooms Number_of_Bathrooms Direction_Facing Washer/Dryer? Doorman? $709,000 2 1 E Y Y 812,500 2 2 N N Y 980,000 3 3 N Y Y 830,000 1 2 W N N 850,900 2 2 W Y N Data in 100 dollars: 7090, 8125, 9800, 8300, 8509
Assignment-2-Set2-Q1-Basic-Statistic-Level-2-
The time required for servicing transmissions is normally distributed with mean = 45 minutes and SD = 8 minutes. The service manager plans to have work begin on the transmission of a customer’s car 10 minutes after the car is dropped off and the customer is told that the car will be ready within 1 hour from drop-off. What is the probability that the service manager cannot meet his commitment?
Assignment-2-Set2-Q2-Basic-Statistic-Level-2-
The current age (in years) of 400 clerical employees at an insurance claims processing center is normally distributed with mean = 38 and Standard deviation =6. For each statement below, please specify True/False. If false, briefly explain why.A. More employees at the processing center are older than 44 than between 38 and 44. B. A training program for employees under the age of 30 at the center would be expected to attract about 36 employees.
Assignment-2-Set2-Q4-Basic-Statistic-Level-2-
Let X ~ N(100, 20^2). Find two values, a and b, symmetric about the mean, such that the probability of the random variable taking a value between them is 0.99.
Assignment-2-Set3-Q5-Basic-Statistic-Level-2-
In January 2005, a company that monitors Internet traffic (WebSideStory) reported that its sampling revealed that the Mozilla Firefox browser launched in 2004 had grabbed a 4.6% share of the market. I. If the sample were based on 2,000 users, could Microsoft conclude that Mozilla has a less than 5% share of the market? II. WebSideStory claims that its sample includes all the daily Internet users. If that’s the case, then can Microsoft conclude that Mozilla has a less than 5% share of the market?
Assignment-2-Set4-Q3-Basic-Statistic-Level-2-
Auditors at a small community bank randomly sample 100 withdrawal transactions made during the week at an ATM machine located near the bank’s main branch. Over the past 2 years, the average withdrawal amount has been $50 with a standard deviation of $40. Since audit investigations are typically expensive, the auditors decide to not initiate further investigations if the mean transaction amount of the sample is between $45 and $55. What is the probability that in any given week, there will be an investigation?
P00.-Sample-Datasets
Sample Datasets Database for Data Science ML algorithms practice
P01.-Pandas-1
Understanding Pandas, Importing datasets, Deriving Attributes, Performing Statistics
P02.-Pandas-2
Understanding Pandas, Groupby Function, Filtering Function
P03.-Pandas-3
Understanding Pandas, Visualization using Matplotlib, Plotting subplots
P04.-Matplotlib-Visualization
Plotting two different categories- box plot, barplot, histogram. Plotting single category- Pie chart, bar chart. Different Plots- Scatter Plot, Histogram, Box Plot, Violin Plot
P05.-Seaborn-Visualization
Strip Plot, Grouping with Strip Plot, Swarm Plot, Box and Violin Plot, placing plots together, Combining the plots, Joint Plot, Density Plot, Pair Plot
P06.-Seaborn-Visualization-Titanic
Seaborn Visualization on Titanic Dataset Visual exploration of different features on No. of people survived or otherwise Visualization using FacetGrid function, Lambda function and criterion function Visualization of subplots
Stack-Overflow-1-Python-Concatenate
Concatenate two time columns into one using pandas