Symbols and Categories
What symbol represents the sample mean?
What is x̄ ?
What is the probability of Charlie rolling a die and he gets a 1 or 2?
What is 1/3?
1/6 + 1/6 = 2/6
2/6 / 2/2 = 1/3
Find the z-score for a test score of 70 if μ=60 and σ=5
What is 2?
If we are creating a 95% confidence interval for a proportion, what calculator function are we using?
If a researcher wants to create a confidence interval for population variance, which distribution should be used?
What is chi-square?
What symbol represents the sample proportion?
What is p̂ ?
Find the complement of P(A)= 0.40
What is P(Ac) = 0.60?
1- 0.40 = 0.60
Find the z-score for 62 if μ=50 and σ=8
What is 1.5?
Which distribution do we use when σ is NOT known?
What is Student t distribution?
Find the mean, median, and mode for the following dataset:
7 10 1 7 1 2 7 4
What is:
Mean: 4.875
Median: 5.5
Mode: 7
What is the point estimate for a population mean?
What is x̄ ?
I have a bag of marbles that has 3 red ones and 7 blue ones. Find the probability of me pulling 2 blue marbles back to back without putting them back in decimal form. (round to 4 decimals)
What is 0.4667?
7/10 * 6/9 = 42/90
42/90 = 0.4667
Find the z-score if our value is 38 and our μ is 42 and our σ is 2.
What is -2?
Which critical value is most used with a confidence level of 95%?
What is 1.96?
40 Employees from the Chick-Fil-A in Riverside and Yucaipa were interviewed and were split into 2 groups. 13 employees in the first group were asked about their job satisfaction. 3 of them said 10/10. In the second group of 27 employees, 11 of them rating their satisfaction 10/10.
With a 0.05 significance level, check if we reject/fail to reject the claim that the second group is happier than the first.
What is
We fail to reject because the p-value of 0.14 > our significance level of 0.05?
What is the point estimate for a sample proportion?
Is this table a valid probability distribution?
0 0.68
1 0.93
2 0.63
3 0.09
What is no?
What calculator function do you use if we are trying to find the area between two z scores?
What is normalcdf?
What are the degrees of freedom for a sample size of 73?
What is 72?
State the empirical rule.
What is
68% of data falls within 1 SD from the mean
95% of data falls within 2 SD from the mean
99.7% of data falls within 3 SD from the mean?
Find the degrees of freedom if n = 25.
What is df = 24?
I will draw a table on the board.
Find the probability of a student passing giving that they studied.
What is 18/25?
What calculator function do we use if we are finding a z-score from a known probability or area?
What is invNorm?
If my degrees of freedom are 20 and my area to the right is 0.05, what is my χ² value?
What is 31.410?
What is 45.88%?