Statistics and Probability Practice Problems
1)Fill in the blanks or circle the correct answer for the following: a)If P(A∩B)=P(A)P(B) then A and B are called independent. b)Write the type of the variables i) Student’s N# qualitative ii) Student’s age quantitative-discrete c)If we reject Ho at 5% significance level, then we MUST also reject it at 1% level False. d)A type II Error cannot be committed when i) Hois true. e)Probability of Type I Error is called significance level. f)If the confidence level decreases, then the confidence
Read MoreUnderstanding Point Estimates, Confidence Intervals, and Hypothesis Testing
Test 4
Point estimate – single number computed from a sample, which serves as a guess for the parameter.
Estimator – statistic of interest and is therefore a random variable.
Estimate – simply a specific value of an estimator.
Confidence interval – Interval of values constructed so that, with a specified degree of confidence, the value of the population parameter lies within it.
Confidence coefficient – Probability that the CI includes the population parameter in repeated samples.
Confidence level – The
Read MoreMI CIUDAD
I live in Rota, which is a small town on the south coast of Spain, with a population of over 25.000 inhabitants.
Rota is a beautiful city, and it is great for walking aorund. There are a lot of narrow streets, and it is full of bars, markets and there are three churches. There is a beach and in summer people go to Rota for their holidays. There is an area called Costilla where there are a lot of outdoor bars and restaurants and there is a lot of nightlife on Saturdays.
The weather here is very good.
Math Concept Check Chapter 4
What is the connection between cartesian geometry and vector geometry? Given a point P in 3-space we associate three numbers x, y, and z with P. These numbers are called the coordinates of P, and we denote the point (x,y,z) or P(x,y,z) to emphasize the label P. The result is called a Cartesian Coordinate System for 3-space, and the resulting description in 3-space is called Cartesian geometry. Vectors are introduced by identifying each point P(x,y,z) with the vector v->=
Concept Check 1
What is a linear equation? What is a system of linear equations? ax+by=c is a linear equation with x and y as variables. When more than x and y, a linear equation is a1x1 + a2x2 + . . .+anxn = b where x1, x2, xn are variables. A finite collection of linear equations in the variables x1, x2, . . ., xn is called a system of linear equations. What is a solution for a system of linear equations? What does it mean to solve a linear system? Given a linear equation a1x1 + a2x2 +
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Personal Protective Equipments (PPE’s)• Personal protective equipments commonly referred to as “PPE “includes all clothing and work accessories designed to protect employees from injury or infection. • It refers to the protective clothing, helmets, hard hats, hearing protectors, respirators, goggles or other garments or equipment’s meant to protect the wearers’ body from injury by heat, chemicals, infection, electrical hazards, airborne particulate matter etc. • The purpose of personal