Mr. Bueller gave his Algebra I class a test on statistics. After the test, he presented the following data to his students regarding their test scores (scores are in percentages).
Mean: 74.5
Standard Deviation: 18.5
Lowest Score: 0
First Quartile: 68
Median: 77
Third Quartile: 85
Highest Score: 98
The lowest score was calculated as a zero because the student had been absent. Once the student returned to
school, she took the test. Unfortunately, she had been absent for most of the lessons and only scored a 53% which
is still the lowest score. How would replacing the 0% with a 53% affect the statistics? Place a check in the box that
describes the new value.
Stays the Same
Increases
Decreases
Mean
Standard Deviation
Median
Interquartile Range

it costs $20 to interview each person for a survey. find the cost to obtain a +- 3% margin of error.

step-by-step explanation:

copy and paste, put it in google

introduction, methodology, results, discussion

step-by-step explanation:

an observational study is one which consists of actual observation to record data and then analyse the data.

there are a number of factors that should be analyzed before starting an observational study.

the main four factors are:

i) introduction:   this should be analysed to check whether the purpose of the study is correctly established and the data recorded are appropriate for the study

methodology:   the method of collecting the data, such as whether randomly selected, and whether sample size matches with the population to be studied, whether questions asked are easy to answer by common men, etc.

results: then results such as summary of data with comments should be studied thoroughly

discussion:   the last is the discussion, this can be either by management people or persons who are all interested , etc.

2. angles qrt and qst both measures 156 degrees.

step-by-step explanation:  

we have been given a diagram of a circle and we are told that measure of arc qvt is 156 degrees.  

we can see from our given diagram that angle qrt and angle qst subtends to arc qvt.

since we know that angles subtended by the same arc at the circumference are always equal.

by angle subtended by same arc theorem, measure of angle qrt and angle qst will be equal to the measure of arc qvt.

therefore, angles qrt and qst both measures 156 degrees and 2nd statement is the correct choice.

the radius is 2 times the diameter.

step-by-step explanation: