Statistics Essentials Quiz

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Test your stats basics.

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May Ann Saballero

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Statistics Essentials Quiz


Froggy Jumps Statistics Essentials QuizVersión en línea Test your stats basics. por May Ann Saballero 1 What is the sum of all probabilities in a distribution? a a b 0.5 c 1 2 A box contains 3 chocolates and 1 cookie. What is the probability of picking a cookie? a Probability = 1 cookie / 4 total = 1/4 b Probability = 2 cookie / 4 total = 1/2 c Probability = 3 cookie / 4 total 3 What is a discrete random variable? Source: statistics1.pptx a Always continuous b Takes values that can be counted c Takes any value within a range 4 What is a continuous random variable? Source: statistics1.pptx a Is always fixed b Takes only integer values c Can take any value within a given range 5 Give an example of a discrete variable. Source: statistics1.pptx a Number of customers in a store b Temperature in a room c Height of a person 6 Give an example of a continuous variable. Source: statistics1.pptx a Marbles in a bag b Amount of rainfall in a day c Number of emails received 7 What is the mean notation (symbol) for a discrete variable? Source: statistics1.pptx a μ b σ c λ 8 What is the formula for the mean? Source: statistics1.pptx a μ = Σ [ (x-μ)² · P(x) ] b μ = Σ [ x · P(x) ] c μ = Σ [ P(x) / x ] 9 What is the variance formula? Source: statistics1.pptx a σ² = Σ [ (x − μ)² · P(x) ] b σ² = Σ [ x² · P(x) ] c σ = Σ [ x · P(x) ] 10 What does small variance indicate? Source: statistics1.pptx a Values are close to the mean b Values are far from the mean c Distribution is uniform 11 What does the mean represent? Source: statistics1.pptx a The average outcome b The most probable value c The total sum of values 12 How do you find the probability of a range? Source: statistics1.pptx a Average the probabilities b Multiply probabilities of endpoints c Add probabilities of all outcomes in the range 13 If X is the number of heads in two coin flips, what is X if you get (Tail, Tail)? a 2 b 1 c 0 14 A spinner has 4 equal parts (A, B, C, D). What is the chance of landing on A? a 1/2 b 1/4 c 1/3 15 In the formula f(x)=2x+4, what is the fixed starting cost? a 4 b 2 c 6 16 If a mean is 2 customers per hour, what does the store expect? a Exactly 2 every single hour b About 2 customers on average c 0 17 . If P(X=1)=0.2 and P(X=2)=0.8, what is the Mean? a 1.5 b 2 c 1.0 18 Discrete variables have "clear _____" between numbers. a gaps b color c lines 19 Expected Value" is another name for: a variance b mean c probability 20 What is the symbol for Mean? a σ 2 b μ c P(x) 21 What is the symbol for Variance? a μ b σ 2 c f(x) 22 If a variable is "Discrete," can you list all its values? a yes b no c maybe 23 Mean helps us _____ outcomes. a Ignore b predict c hide 24 In a store, Mean tells you the ______ number of customers. a Worst b Average c highest 25 Can probability be a negative number? a yes b no c maybe

Statistics Essentials Quiz

Froggy Jumps

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Statistics Essentials QuizVersión en línea

por May Ann Saballero

What is the sum of all probabilities in a distribution?

A box contains 3 chocolates and 1 cookie. What is the probability of picking a cookie?

What is a discrete random variable? Source: statistics1.pptx

What is a continuous random variable? Source: statistics1.pptx

Give an example of a discrete variable. Source: statistics1.pptx

Give an example of a continuous variable. Source: statistics1.pptx

What is the mean notation (symbol) for a discrete variable? Source: statistics1.pptx

What is the formula for the mean? Source: statistics1.pptx

What is the variance formula? Source: statistics1.pptx

What does small variance indicate? Source: statistics1.pptx

What does the mean represent? Source: statistics1.pptx

How do you find the probability of a range? Source: statistics1.pptx

If X is the number of heads in two coin flips, what is X if you get (Tail, Tail)?

A spinner has 4 equal parts (A, B, C, D). What is the chance of landing on A?

In the formula f(x)=2x+4, what is the fixed starting cost?

If a mean is 2 customers per hour, what does the store expect?

. If P(X=1)=0.2 and P(X=2)=0.8, what is the Mean?

Discrete variables have "clear _____" between numbers.

Expected Value" is another name for:

What is the symbol for Mean?

What is the symbol for Variance?

If a variable is "Discrete," can you list all its values?

Mean helps us _____ outcomes.

In a store, Mean tells you the ______ number of customers.

Can probability be a negative number?