A researcher believes there is a difference in the mean number of days before visible results begin to show among three types of facial creams that reduce wrinkle lines.Several consumers are randomly selected and given one of the three creams. Each participant then recorded the number of days it took to see results. The results areshown in the table. Based on these data, can you conclude that there is a difference between the mean number of days for these three creams? Use a 0.05 level ofsignificance and assume the population distributions are approximately normal with equal population variances.Cream #12020141715Cream #21315151113Cream #3141815161710Copy DataStep 1 of 2: Compute the value of the test statistic. Round any intermediate calculations to at least six decimal places, and round your final answer to four decimalplaces.

let's set up the null hypothesis and alternative hypothesis null hypothesis: there is no difference…

Answered: A researcher believes there is a…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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on a 100 item test romel got a score of 88 which is the 9th decile what does it mean
Find the value of the test statistic z using graphing calculator.The claim is that the proportion of people with blood type A-positive is more than 0.25, and the sample statistics include n = 616 randomly selected people and 185 of them with blood type A-positive.
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Hellen has just started a new years competition for her local climbing gym. There are two categories for this competition: singles and group (18 people). The rules are simple, put in the most hours in one months time and you get a guided tour to climb Ten Sleep canyon. She knows from running this competition over the years that the number of hours climbers at her gym spend training during this competiton is approximately normal and their mean competition hours per month in the gym are 24 hrs with a standard devaition of 6 hrs. Singles Distribution: X~N( , ) Group Distribution: x̄~N( , ) The winning single participant last year was in the 97 th percentile.... how many hours did the winner accumulate over the month? One of Hellan's friends Dave put in 27.12 hours on the wall. What is the probablity that another individual will beat his time? If someone puts in between 25.5-32.1 hours on the wall they get a Mountain Goat shirt. What percent of the singles competitors is expected to…
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Uly grew pechay plants in their backyard using a special soil. When Uly harvested them, he measured their lengths (to the nearest mm) and group the results: Length (mm) Frequency 150 - 154 155 - 159 160 - 164 6. 165 - 169 8 170 - 174 175 - 179 11 180 - 184 185 - 189 3 What is the mean, median, mode, Q2, Ds, Pso of the data set in the problem? What can you say about the values that you've gotten. ? 2.
Statistics Question
The data table shows the ages in years of 10 men with systolic blood pressure. The Age,x: 18, 26, 39, 46, 48, 64, 68, 31, 58, 22. and systolic blood pressure, y: 111, 123, 145, 130, 201, 183, 198, 131, 177, 119. The sample correlation coefficient r is 0.881. Remove the data entry for the man who is 48 years old and has a systolic blood pressure of 201 millimeters of mercury from the data set and find the new correlation coefficient.
The data table shows the ages in years of 10 men with systolic blood pressure. The Age,x: 18, 24, 39, 45, 49, 63, 71, 29, 57, 22 and systolic blood pressure, y: 109, 121, 142, 133, 199, 186, 199, 132, 177, 117. The sample correlation coefficient r is 0.913. Remove the data entry for the man who is 49 years old and has a systolic blood pressure of 199 millimeters of mercury from the data set and find the new correlation coefficient.
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Thanks. Why is Kathy's score considered better-is it because it is a posituve score? What does the Z score represent in this case?
29

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