4. an organizational psychologist measures levels of job satisfaction in a sample of 30 participants. to
measure the variance of job satisfaction, it is calculated that the ss = 120 for this sample.
a. what are the degrees of freedom for the variance?
n= degrees of freedom (df): value - 1
the degrees of freedom of an estimate of variance is equal to n-1
the "n” refers to the number of observations
formula:
1) sample size of n = 30 / value or ss/n = variance
2) ss = 120/30 = 4 (df)
3) 30-1= 29 degrees of freedom

Analyze the data sets below. data set a 25,25,25,26,26,26,27,28,28,29,30,31 ,31,32,33,33,34,35,35,35 data set b 25,25,25,26,26,26,26,27,27,27,27,28 ,28,29,29,30,31,31,32,34 which of the following statement are true? select all that apply. a. data set a is relatively symmetric and data set b is skewed left. b. the means of the data sets are within 3 units from eachother. c. the data sets have the same standard deviation. d. the mean of data set a is 27.95 and the mean of data set b is 30. e. the data set b has a higher standard deviation than data set a. f. the mean and median of data set a are close in value.

What is the solution of log2  (3x  -  7)  =  3? 4 5

Avery’s piggy bank has 300 nickels, 450 pennies, and 150 dimes. she randomly picks three coins. each time she picks a coin, she makes a note of it and puts it back into the piggy bank before picking the next coin.