A sample of n=25 scores has M=20 and s^2=9. What is the sample standard deviation?

About 4% of the population has a particular genetic mutation. 1000 people are randomly selected.
Find the mean for the number of people with the genetic mutation in such groups of 1000. (Remember that means should be rounded to one more decimal place than the raw data.)

$$\begin{array}{|ccc|}\hline \text{Lower Class Limit}& \text{Upper Class Limit}& \text{Frequency}\\ 30& 34& 1\\ 35& 39& 1\\ 40& 44& 2\\ 45& 49& 6\\ 50& 54& 5\\ 55& 59& 11\\ 60& 64& 10\\ 65& 69& 21\\ 70& 74& 13\\ \hline\end{array}$$
What is the mean for the following Grouped Frequency Data Table (GFDT).
To save time, copy the data in MOM and paste special (as text) into the ESP3 Excel sheet. You can then copy the answer from Excel and paste it into the answer box on MOM.

To compare and contrast:Observational studies and designed experiments and to identify the study that allows a researcher to claim causality.

Use the following table to answer the following questions. After analyzing sales data, the owner of a mobile phone store produced the following joint probability distribution of the number of Xenia phones (X) and Yella phones (Y) sold daily.
$$\begin{array}{|cc|}\hline & \text{Xenia Phone Daily Sales}\\ \text{Yella Phones Daily Sales}& 1& 2\\ 1& 0.4& 0.1\\ 2& 0.3& 0.2\\ \hline\end{array}$$
Which phone is more likely to have two sales in a day?
1) the brands are equally likely to have two sales in a day
2) Xenia
3) you cannot determine this from the provided data
4) Yella

Create a two-way table that shows the joint and marginal relative frequencies using the table below.

Find the mode, mean, and standard deviation of the following data: 3, 2, 3, 4, 6

The one figure you would request from the given three figures if you are applying for an entry-level job at the large firm and informed of the mean, or mode salary.