Determine standardized test statistic z-corresponding area

Reference no: EM13112089

Random sample of 90 eighth grade students' scores on the national mathematics assessment test has mean score of 284 with standard deviation of 35. This test result prompts state school administrator to declare that mean score for state's eighth graders on this exam is more than 280. At mean = 0.14, is there adequate evidence to support administrator's claim.

Determine standardized test statistic z and its corresponding area. If convenient use technology. z=( ) round to two decimals. Area= ( ). round to four decimals.

Determine the P-value. If convenient, use technology. P-value = ( ) round to four decimal places as needed.

Make decision whether to reject or fail to reject null hypothesis. Reject Ho or Fail to reject Ho ( ).

Reference no: EM13112089

Questions Cloud

Seting up the null and alternative hypotheses : A 1990 census report revealed that the mean distance that U. S. citizens live from their birthplace is 50 miles and that the standard deviation is 15 miles. A random sample of 49 residents of your city yielded a mean distance of 56 miles.

Question based on chemistry change : Determine the sign of ΔS sys and ΔS surr for each chemical reaction.2CO(g)+O 2 (g)?2CO 2 (g)ΔH ° rxn = -566.0 kJ. Choose from:

Explain why this error caused an immune reaction : Marco was in a car accident and lost a significant amount of blood. The doctors knew Marco had type O blood, but due to a terrible error, Marco received blood that was type A. This caused a severe immune reaction, but luckily Marco survived. Expla..

Determining z-test of a mean : Due to increase in product demand, management needs to increase labor production hours by an estimated 270 hours. Any-Business currently has 30 production employees whose hourly wages varies from $7.50 - $8.50 per hour.

Determine standardized test statistic z-corresponding area : Determine standardized test statistic z and its corresponding area. If convenient use technology. z=( ) round to two decimals. Area= ( ).

How can you explain this observation : Hospital patients often become infected with resistant bacteria that are rarely found outside of the hospital environment. How can you explain this observation?

Fundamental difference in voltaic and electrolytic cell : What is the fundamental difference between a voltaic cell and an electrolytic cell. Can a voltaic cell in which both half-reactions are the same generate a current.

Defect levels at two plant : The Allbest software company owns two computer-manufacturing plants. Each plant produces the Ultimate computer model. Plant measurement has determined that 28 out of 452 tested computers at Plant A were defective and that 21 out of 505 tested at p..

Calculating equilibrium constant for the reactions : Calculate the equilibrium constant for each of the reactions at 25 ° C .O 2 (g)+2H 2 O(l)+2Cu(s)→4OH - (aq)+2Cu 2+ (aq) Express your answer using one significant figure.

User Account

All Pages