Critical value approach to test the level of significance

Assignment Help Basic Statistics

Reference no: EM1392462

AA random sample of 16 students showed aht the variance in the number of hours they spend studying for a final exam was 25 hours^2.

a) Construct a 95% confidence interval for the population variance and standard deviation of hours spent studying. Assume the population of hours spent studying is normally distributed.

b) Test, at the 5% level of significance, whether the population standard deviation of hours spent studying is less than 10. Use the Critical value approach.

Reference no: EM1392462

Questions Cloud

What is the natural rate of unemployment : What is the real wage as determined by the price-setting equation and what is the natural rate of unemployment?

Policy of internal innovation of companies : Investigate and report on two companies. Choose one which has always adhered to policy of internal innovation and second which has obtained technology many times through external means.

Our legal system relies on several components : Our legal system relies on several components - Constitutions (federal and states), statutes, case law applied by judges, and regulations written by regulatory agencies.

Explain what is the correct banking angle of the road : If the string is 9.50 m long, has a mass of 55g and is pulled taut with a tension of 9.5 N, how much time does it take for a wave to travel from one end of the string to other.

Critical value approach to test the level of significance : Test, at the 5% level of significance, whether the population standard deviation of hours spent studying is less than 10. Use the Critical value approach.

Assumptions to apply linear regression : Critically discuss the assumptions, if any, regarding a Chi-square test? What are the assumptions to apply linear regression?

How long the engines should be fired : The spacecraft's mass is 291 kg and the thrust (force) of the rocket engines is 59 N. If the speed of the spacecraft should be decreased by 128 m/s, how long the engines should be fired. (Ignore the change in mass as a result of the rocket engines..

Finding standard deviation of normal distribution : A work-study engineer times a certain operation, and discovers that the average time it takes is 10 minutes, but on 15% of occasions it takes more than 13 minutes.

How long does the projectile remain in the air : A projectile is fired horizontally from a gun that is 88-m above flat ground, emerging from the gun with a speed of 250m/s.

User Account

All Pages