Statistics Assignment | Custom Assignment Help

1.“A recent survey and analysis conclude that 80 percent of all pre-school children enjoy eating ice cream.” The

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the statement is an example of:

  • Descriptive Statistics
  • Statistical Significance
  • Inferential Statistics
  • Standard Score

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2.The null hypothesis of “average GPA of Rutgers students is equal to 3.2” is to be tested at a significant level of 0.05. A sample of 25 students resulted in a computed t of 1.67. The decision is to

  • average GPA of students is 3.2
  • average GPA of students is more than 3.2
  • average GPA of students is less than 3.2
  • none of the above

3.A study claims that the proportion of adults in the U.S. with rudimentary literary skills is 21%. A researcher believes the true percentage differs from this one that is published (Source: U.S. Department of Education). Which of the following demonstrates a Type I error?

  • Not rejecting H0: p = 0.21, when actually p = 0.21.
  • Rejecting H0: p = 0.21, when actually p = 0.21.
  • Rejecting H0: p = 0.21, when actually p is not equal to 0.21.
  • Not rejecting H0: p = 0.21, when actually p is not equal to 0.21.

4.The correlation coefficient r was computed to be -0.80. This indicates that

  • there is almost no relationship between the two variables
  • 80 percent of the variation in the independent variable is accounted for by the variation in the dependent variable.
  • the coefficient of determination is -0.20.
  • none of the above

5.The slope of a regression equationn? is 10, the value where the line intersects the Y axis when X = 0 is 4. What is the regression equation

  • X = 0 + 10Y
  • Y = 10- 4X
  • Y = 4 + 10X
  • Y = 4- 10X
  • none of the above

6.Director of a company wants to know the mean salary of the company’s employees. The most effective way to determining this is to

  • Record the salaries of a simple random sample of employees
  • Record the salaries of a stratified random sample of employees
  • Record the salaries of a cluster random sample of employees
  • Record the salaries of a convenience sample of employees
  • Consult computer records regarding the salaries of all employees.

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