Targeting a score of on an exam

Reference no: EM13104039

A professor is targeting a score of 80 on an exam. His forty-nine students averaged 78 on an exam with s = 7. Are the scores significantly less than 80 at a significance level of 0.05? Show your work and state the conclusion.

Reference no: EM13104039

Questions Cloud

Examine the effectiveness of recent economic concerns : Why is this paragraph effective and examine why it is effective. Recent economic concerns promoted President Obama to meet with credit card industry executives in April, 2009.

Describe workplace culture as regards efficiency : "Efficiency is exploitation. The studies and techniques developed by Taylor and the Gilbreths simply enabled employers to get more work out of their employees."

Standard deviation of mean on the either side : The lifetimes of light bulbs of a particular type are normally distributed with a mean of 370 hours and a standard deviation of 5 hours. What percentage of bulbs has lifetimes that lie within 1 standard deviation of the mean on either side?

Playing card probability : A bridge hand consists of 13 cards dealt at random from an ordinary deck of 52 playing cards. How many possible bridge hands are there?

Targeting a score of on an exam : A professor is targeting a score of 80 on an exam. His forty-nine students averaged 78 on an exam with s = 7. Are the scores significantly less than 80 at a significance level of 0.05? Show your work and state the conclusion.

Rank from largest to smallest : System A consists of a mass attached to a spring with a force constant ; system B has a mass 2 attached to a spring with a force constant ; system C has a mass 3 attached to a spring with a force constant 6; and system D has a mass attached to a s..

Binomial probability distribution-sample question : The Complaints Department of a popular used car dealer receives most complaints about the electrical system, particularly the starter.

What will be the electric flux through that surface : Four charges are placed in a three-dimensional space. The charges have magnitudes 2 nC, -4 nC, 1 nC, and -9 nC. If a Gaussian surface encloses all the charges, what will be the electric flux through that surface?

Probability-addition rule : Find the probability of drawing either a king or a spade in a single draw from a pack of 52 playing cards.

User Account

All Pages