Asked by Victoria Posey on Jul 06, 2024

verifed

Verified

A random sample of 64 SAT scores of students applying for merit scholarships showed an average of 1400 with a standard deviation of 240.If we want to provide a 95% confidence interval for the population mean SAT score, the degrees of freedom for reading the t value is

A) 60.
B) 61.
C) 62.
D) 63.

Degrees of freedom

The count of independent variables or measurements that can change in an examination while still adhering to all limitations.

Confidence interval

A ladder of figures, gathered from statistical study of a sample, with a probability of including the undetected value of a population parameter.

SAT scores

Standardized test scores used primarily in the United States for college admissions, assessing reading, writing, and mathematical skills.

  • Contrast the employment of standard normal distribution against t-distributions when forming confidence intervals.
verifed

Verified Answer

DH
Debbi HinderliterJul 06, 2024
Final Answer :
D
Explanation :
The degrees of freedom for a t-distribution, when estimating a confidence interval for the mean, is calculated as the sample size minus one. Here, the sample size is 64, so the degrees of freedom is 64 - 1 = 63.