Book Definitions
A hypothesis is
a) data obtained from a sample
b) a premise or claim that we want to estimate
b) a premise or claim that we want to estimate
Write the formula to calculate the z score
z = (x-μ)/σ
Donna will toss a coin and record the toss as heads (H) or tails (T). Then, she will randomly pick a card from a box that has four cards numbered 1, 2, 3, and 4, and record the number chosen.
Use the format H1 to indicate that the coin toss is heads and the number chosen is 1.
Describe the sample space of Donna's experience.
{H1, H2, H3, H4, T1, T2, T3, T4}
15-8+5-(-7)
19
What happens when you have 2 or more consecutive absences?
The numerical value obtained from a statistical test is called
a) test value
b) Level of significance
c) sample mean
a) test value
Formula to calculate the probability of two independent events A and B occurring together
P(A∩B) = P(A) × P(B)
To fill in the blanks in the following probability distribution table, what could be a possible solution?
Value x of X P( X = x )
-10 ____
2 ____
5 0.33
8 0.07
12 0.11
0.24 and 0.25, or
0.09 and 0.40, or
0.31 and 0.18
5 - (-3) + 8 - 15 + 2
3
What do you have to do if you are sick or have an emergency and you cannot attend the PLTL session?
Email the professor with an excuse and CC your PLTL leader
What is a mutually exclusive event?
Events that do not occur at the same time.
P (A or B) = P(A) + P(B) - P(A and B)
Anita's, a fast food chain specializing in hot dogs and garlic fries, keeps track of the proportion of its customers who decide to eat in the restaurant (as opposed to ordering the food 'to go') so it can make decisions regarding the possible construction of in-store play areas, the attendance of its mascot Sammy at the franchise locations, and so on. Anita reports that 52% of its customers order their food to go.
In a random sample of 40 individual customers is taken, estimate the number of customers order their food to go. Do not round your response.
20.8
15 + 8 + 4 - (-15) - 12 - (-4)
34
What happens if you're constantly on your phone or not doing the work?
You might be marked as absent :(
What is the difference between a permutation and a combination?
A permutation is used for the list of data (where the order of the data matters) and the combination is used for a group of data (where the order of data doesn't matter).
What is the formula to find the Expected Value of a Function? (Expectation)
E ( X ) = μ = ∑ x P ( x )
A coin is tossed three times. Find the probability of getting a tail on the first toss, the second toss, or both.
3/4
3x2 + 6x - 3
when x = 3
42
After how many minutes will you be considered absent if you're not in class?
After 10 - 15 minutes!
What is the empirical rule law?
68% of the observed data will occur within one standard deviation, 95% within two standard deviations, and 99.7% within three standard deviations.
What formula will you use for the following problem?
Of the people who fished at Clearwater Park today, 42 had a fishing license, and 28 did not. Of people who fished at Mountain View Park today, 42 had a license, and 18 did not. No one fished at both parks.
Suppose that one fisher is chosen from each park at random, what is the probability that the fisher chosen from Clearwater had a license and the fisher chosen from Mountain View did not have a license?
P(A∩B) = P(A) × P(B)
A binomial experiment with probability of success p=0.35 and n=7 trials is conducted. What is the probability that the experiment results in exactly 1 success? Round your answer to three decimal places.
0.185
At the beginning of the month, your account balance was $94. During the month, you deposited $562 and wrote a check for $474. What was your balance at the end of the month?
182
What's your PLTL name?
Mildred Infante :D