Chapters 4
The sample space for a procedure consists of
all possible simple events. That is, a sample space consists of all outcomes that cannot be broken down any further.
Define the type of the variable
Grades (A, B, C, D, F) earned in statistics classes
Not a random variable
requirements for the F distribution
The populations are normal, have the same variance, and have the same quantitive data+the samples are independent
How do we find all of the data about normal distribution
Draw a boxplot with all of the parts and quartiles.
SI and the whole group checks
What do we use Xgof for?
Totes goodness of fitness
Exact unrounded ages of statistics students
Continuous
Positive z score
The number of the standard deviations above the mean
What do we use for cumulative data in binomial distribution?
binomcdf
Describe the shapes of the distributions and their differences.
bell-shaped
skewed left
skewed right
Formal addition rule
P(A)+P(B)-P (A and B)
All of the requirements binomial distribution
1. Each trial has only two outcomes
2. Fixed numbers of trials
3. The trials are independent
4. The probability of success remains the same in all trials
The U.S. Air Force requires that pilots have heights between 64 in. and 77 in. Heights of women are normally distributed with a mean of 63.7 in. and standard deviation of 2.9in. B. If a branch of the military changes the height requirements so that all women are eligible except the shortest 1% and the tallest 2%, what are the new height requirements?
57 inch and 70 inch
Which function do we use to find binomial distribtion variables
binompdf
What do you use to see if there is a linear correlation between the dots?
LingregTTest
Which calculator function do you use for F distribution?
ANOVA
What is the number of successes if the number of failures is 0.56.
it is 0.44.
A chocolate company are making products with the rate of the defect 15%. If the customer purchases 12 products like that, what is the probability of getting at least one defective product?
0.858
z score to probability
normalcdf
That the variables are dependent on each other
What is the complement of the event
The situations when the event will not occur
What is the requirement for the probability distribution
2)P of x should be between 0 and 1 3)x should be a numerical value
When do we fail to reject H0
We fail to reject the null hypothesis when P value is greater than alpha
Area to z score
invnorm
How do we find the mean manually?
What is the mode?
Sum of all data values/samle size
Mode of a data set is the values that occure with the greatest frequency.