Author Question: A business with 5 copy machines keeps track of how many copy machines need service on a given day. ... (Read 169 times)

jc611 · **on:** Jun 24, 2018

A business with 5 copy machines keeps track of how many copy machines need service on a given day. It believes this is binomially distributed with a probability of p = 0.2 of each machine needing service on any given day.

It has collected the following based on a random sample of 100 days.

X Frequency
0 28
1 38
2 22
3 7
4 or 5 5
Total 100

Given this information, assuming that all expected values are sufficiently large to use the classes as shown above, the critical value for testing the hypothesis will be based on 5 degrees of freedom.
Indicate whether the statement is true or false

Question 2

The Conrad Real Estate Company recently conducted a statistical test to determine whether the number of days that homes are on the market prior to selling is normally distributed with a mean equal to 50 days and a standard deviation equal to 10 days.

The sample of 200 homes was divided into 8 groups to form a grouped data frequency distribution. The degrees of freedom for the test will be 7. Indicate whether the statement is true or false