do resting heart rates differ from vigilance task heart rates? 1. Turn the research question into a formal hypotheses. 2.  Identify the variable, the sc

Explain the relationship between statistical significance and effect size

What is statistical significance?

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Sample data were collected in a study of calcium supplements and their effects on blood pressure. A placebo group and a calcium group began the study with measures of blood pressures for each group. What test would be most appropriate, if you have non-normal data? Name of Test _____________________________________________

The average income of a large sample of households is $63,000 and the s.d. is $7,000. Assume that the data is approximately bell-shaped. What percent of these households have incomes between $42,000 and $77,000? Don’t forget to properly justify your answer using the empirical rule.

Do males have a significantly lower mean on the ACT test than females? n st. dev 12pt ✓ I 50 Paragraph Males Females What is the appropriate statistical test that should be used to test for significance? Calculate the standard error, the test statistic, and the degrees of freedom? What is the critical score? Do males score significantly lower than females? Edit View Insert Format Table mean 25 18.8 21.3 4.5 3.0 ✓ T²✓ E✓ EV SV B I UAV 2 ✓ T²V T田 √x + ✓

In impact of mobile usage on student's grades, what statistical tool you will recommend to use. Give reasons why?

Define “attributable risk” and explain the interpretation of this measure of association.           What are the basic uses of descriptive statistics?           State and define the three measures of Central tendency.