Do students taking supplement-significantly better memory

Assignment Help Basic Statistics
Reference no: EM13148711

A researcher is testing the effectiveness of a new herbal supplement that claims to imrpvoe memory performance. a sample of n=25 college students is obtained an each student takes the supplement daily for six weeks. At the end of the 6-week period, each student is given a standardized memory test, and the average score for the sample is M=39. For the general population of college students, the distribution of test scores is mui=35 and a standard deviation of 15. Do students taking the supplement have significantly better memory scores? Use a one-tailed t-test with an alpha=0.05.

Reference no: EM13148711

Questions Cloud

How an enzyme catalyzes a reaction : Your essays should be several paragraphs in length for each question, be thoroughly paraphrased, and include appropriate in-text citations and a reference list in APA format.
Concept of transfer price based on : The subsidiary still possesses 40 percent of this inventory at the current year end. Top had established the transfer price based on its normal markup. What are the consolidated sales and cost of goods sold?
What is the molarity of the hcl solution : A 24.9 mL volume of HCl reacts completely with 55.0 mL of aqueous Na2CO3. The reaction is as follows: 2HCl (aq)+ Na2CO3(aq) ->CO2(g)+H2O(l)+2NaCl(aq) The volume of CO2 formed is 141 mL at 27°C and 742 mmHg.
What is the standard deviation for the class : What is the standard deviation for the class? b. What percentile did you score in?
Do students taking supplement-significantly better memory : The distribution of test scores is mui=35 and a standard deviation of 15. Do students taking the supplement have significantly better memory scores? Use a one-tailed t-test with an alpha=0.05.
Define cool down the reaction flask as needed : Assume you can heat up or cool down the reaction flask as needed for the reaction to proceed with practical rates even if no temperature is indicated in the table
Determining the number of genes controlling seed coat : Two homozygous, white-seeded corn lines were crossed and all progeny were red-seeded. These red-seeded F1 progeny were selved, and the population segregated 9 red-seeded:7 white-seeded. Explain these results by determining the number of genes cont..
What is the amount a in actual dollars equivalent : at an annual general inflation rate of f . Also, i = 9%. What is the amount A in actual dollars equivalent to A’ = $1,000 in constant dollars? Please provide step by step detail.
Consolidated sales and cost of goods sold : The subsidiary still possesses 40 percent of this inventory at the current year end. Top had established the transfer price based on its normal markup. What are the consolidated sales and cost of goods sold?

Reviews

Write a Review

Basic Statistics Questions & Answers

  How to correct error while selecting items from sample

Suppose you take a random sample of 25 from a lot of 1,000 items but later realize that you should have selected a sample of 40 items instead. How do you correct this error?

  Formulate an lp problem for store budgets a total value

Markups on Supertrex seen at other local stores range from 20% to 45%, Kruger decides that its markup had best be in this range as well. Formulate as an LP Problem.

  Estimating the proportion of vehicle

The State Transportation Department is interested in estimating the proportion of vehicle owners that are operating vehicles without the required liability insurance.

  Find the best statistical analysis technique

Name the inferential statistical test that would be used for the method of training and why?

  Mean of the sampling distribution

Calculate the population mean and compare it to the mean of the sampling distribution.

  Data about null hypothesis

How might one know if an error was made in accepting or rejecting the null hypothesis? Do you suppose the nature of the research has an influence on the selection of the significance level? Why or why not?

  Margin of error account for the fact

What is the smallest number of consumers that Timex can survey to guarantee a margin of error of .05 or less at a 99% confidence level and calculate the intervals correctly

  Spot the type of forecasting approach for limited historical

If historical time series data is very limited, what type of forecasting approach would be useful.

  State the multiple regression equation

The sales of the bicycle (in thousands of dollars) and also the levels of media expenditure (in thousands of dollars) during the test month are recorded. State the multiple regression equation.

  Hours required to manufacture units

It took a contractor 5000 hours to manufacture their first unit of an item. If the contractor expects to achieve a 94% unit learning curve, how many hours would be required to manufacture units 76-100?

  Determining conclusion regarding null hypothesis

What is your conclusion regarding null hypothesis?

  Description of z-test

Suppose that, in a sample of 200, we observe 140 successes. Is this sufficient evidence at the 1% significance level to indicate the the population proportion of successes is greater than 65%

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