Nation mathematics assessment test

Assignment Help Basic Statistics
Reference no: EM13100418

A random sample of 77 eighth grade students' scores on a nation mathematics assessment test has a mean score of 278 with a standard deviation of 31. This test result prompts a state school administrator to declare that the mean score for the state's eighth graders on this exam is more than 270. At infinity of .13, is there enough evidence to support the administrators claim? Find the standardized test statistic z and it corresponding area.

Reference no: EM13100418

Questions Cloud

Test value for the claim of department store : An average department store sells 350 men's suits per year. The men's suit departments at a particular national chain of stores claim they sell more than the industry average. In 35 of their stores, they sold, on the average, 430 suits per year wi..
Case study - alternative work arrangements : Various alternative work arrangements exist for use in businesses and other types of organizations; included among the options are compressed work weeks, flexible work schedules, telecommuting, and job sharing.
Explain good leadership qualities for task completion : Good leadership qualities by putting the requirement for task completion before all else? How else could supervisor have reacted? How does this attitude influence team performance?
Estimate the optimal values of decision variables : Solve the problem using graphical linear programming and answer the questions that follow. What are the optimal values of the decision variables and Z?
Nation mathematics assessment test : A random sample of 77 eighth grade students' scores on a nation mathematics assessment test has a mean score of 278 with a standard deviation of 31.
Calculate potential energy of the compressed spring : A spring has a spring constant = 40 N/m. It is compressed by a distance 10 cm. The mass of the cart is 300 grams. The angle of incline of the track is 20º.
Create study on bioecological model of human development : Create a comprehensive study on The Bioecological Model of Human Development. Bioecological Model of Human Development has four basic systems.
Identify the type of bias or error : A randomized controlled trial was implemented to assess whether a human papillomavirus (HPV) vaccine prevents pre-cursors of cervical cancer in women between the ages of 15 and 25 years.
What is the ratio of the radii of their circular paths : a proton and an electron have the same kinetic energy upon entering a region of constant magnetic field. What is the ratio of the radii of their circular paths?

Reviews

Write a Review

Basic Statistics Questions & Answers

  Finding f test for significance of straight line regression

Carry out F test for significance of straight line regression of Y on X and interpret your results.

  Proportion nonconforming in processes

Construct a 90% two-sided confidence interval onthe difference between the proportion nonconforming in processes 1 and 2. Based on this confidence interval, can you conclude at a significance level of 10% that the difference is not equal to 10%? W..

  Probability depends on poisson distribution

What is the probability that at most five cases of E. coli per 100,000 are reported in California this year?

  Model of an ordinary quantitative variable

Discuss whether this variable should be placed in the model as an ordinary quantitative variable or by means of four 0, 1 indicator variables.

  Probability on discrete-distribution

When combining probabilities, to find the probability of one event AND another event, the separate probabilities should be

  Average gpa for the whole class

In you determine the GPA of 10 members of the class and then calculate the average, will the number you get necessarily be the same as the average GPA for the whole class? On what factors would you expect the reliability of the estimate to depend..

  Interest rate to the nearest tenth

An account invested in a money market fund grew from $73,329.23 to $73,627.26 in a month. What was the interest rate to the nearest tenth?

  Determine the critical value for hightailed test

Using the z table in Table E of Appendix C, determine the critical value for the hightailed test with a = 0.035.

  Significant correlation among attitudes for husbands - wives

Calculate the Pearson correlation for these data also determine whether there is a significant correlation among attitudes for husbands also wives.

  Dispensing soft drink into containers

A soft drink bottling machine is set to dispense soft drink into containers labeled 16 ounces. While the actual quantities vary they are normally distributed with a mean of 16.1 ounces and a standard deviation of 0.015 ounces.

  Testing the significance of the regression model

The ANOVA summary table below is the result of a regression of sales on year of sales. Is the relationship statistically significant at .05? Comment.

  State the decision rule for the mean

It is suspected that the mean turnover has changed and is not 6.0. Use the .05 significance level. State the decision rule.

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd