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Grade 11 Statistics and Probability Concepts
A certain store recorded their sales each day, in total dollars, for a month. If they calculate the standard deviation, and find that it is nearly zero, which of the following is the most reasonable to conclude?
1. The store had very few sales for the entire month
2. The store had almost equal sales each day
3. The days with high sales equally balanced the days with low sales
4. Not enough information to make any conclusion
Grade 11 Represent and Determine Probability
Grade 11 Statistics and Probability Concepts
The symbol, $bar x$, represents the                              .
1. population mean
2. population standard deviation
3. sample mean
4. sample standard deviation
Grade 11 Represent and Determine Probability
If you flip a coin 4 times, what is the probability you get heads, heads, tails, heads in that order?
1. $1/8$
2. $1/2$
3. $1/16$
4. $1/32$
5. none of these are correct
Grade 11 Collecting and Interpreting Data CCSS: HSS-ID.A.4
Standard deviation is best described as
1. the difference between the number and the mean.
2. the sum of the differences between the numbers and the mean.
3. the square root of the sum of the differences between the numbers and the mean squared and divided by the number of terms.
4. the square root of the mean divided by the Z-Score times the sum of the numbers.