Answer:
y-intercept is 30
Step-by-step explanation:
Given the model comparing this model to the equation of a straight lines we can get the y- intercept
The y- intercept is 30 which is the constant factor and it describes to us about the one-time registration fee of $30.
Answer:
The degrees of freedom for this sample are 27.
The sample size to get a margin of error equal or less than 0.3656 is n=4450.
Step-by-step explanation:
The degrees of freedom for calculating the value of t are:
With 27 degrees of freedom and 95% confidence level, from a table we can get that the t-value is t=2.052.
The sample size to get a margin of error equal or less than 0.3656 can be calculated as: