Solved

A Random Sample of Size N Has Been Selected from a Normally

Question 168

Multiple Choice

A random sample of size n has been selected from a normally distributed population whose standard deviation is A random sample of size n has been selected from a normally distributed population whose standard deviation is . In hypothesis testing for the population mean, the t-test should be used instead of the z-test if: A) n > 30 and σ is unknown B) n < 30 and σ is unknown C) n < 30 and σ is known D) n < 30 and β is known E) n > 30 and σ is unknown and n < 30 and σ is known . In hypothesis testing for the population mean, the t-test should be used instead of the z-test if:


A) n > 30 and σ is unknown
B) n < 30 and σ is unknown
C) n < 30 and σ is known
D) n < 30 and β is known
E) n > 30 and σ is unknown and n < 30 and σ is known

Correct Answer:

verifed

Verified

Unlock this answer now
Get Access to more Verified Answers free of charge

Related Questions

Q163: A city bus driver claims that the

Q164: In testing the difference between the means

Q165: Two independent random samples of sizes <img

Q166: Which of the following statements about matched-pairs

Q167: The chi-square distribution is skewed to the

Q169: A right-tailed area in the chi-squared distribution

Q170: Which of the following statements is false?<br>A)

Q171: The following n = 10 observations are

Q172: The symbol <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB8220/.jpg" alt="The symbol

Q173: If you are testing <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB8220/.jpg" alt="If