A group of students were given a spelling test. The table shows their marks.
Mark
Frequency
6
5
c)
7
4
a) Work out the range of the marks.
8
7
b) How many students are in the group?
9
10
10
4
c) Work out the mean mark of the group.
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Averages from a table - Basics
Averages- Mean, Median, Mode &
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What is the approximate value of  q  in the equation below? –1.613–1.5220.5853.079

Arandomized controlled trial is designed to evaluate the effect of metoprolol in patients with heart failure. while preparing for statistical analysis, the researcher reviews some common types of statistical errors. which of the following statements is true regarding a type i error in a clinical study? a. the study is not significantly powered to detect a true difference between study groups. bthe null hypothesis is true but is rejected in error. c. the null hypothesis is false but is accepted in error. d. type i error is also known as beta and is usually 0.1 or 0.2. e. type i error depends on the study's confidence interval.

Factor the following expression completely 6x^11-24x^7