critical value p vaule and z value Telephone Calls A researcher knew that before cell phones, a person made on average 2.8 calls per day. He believes that the number of calls made per daytoday is higher. He selects a random sample of 33 individuals who use a cell phone and asks them to keep track of the number of calls that they made on acertain day. The mean was 3.1. At a=0.10, is there enough evidence to support the researcher's claim? The standard deviation for the population found by aprevious study is 0.9. Assume that the variable is normally distributed. Use the critical value method with tables.

Given:μ = 2.8n = 33x̅ = 3.1σ = 0.9 We need to test the claim that number of calls per day are…

Answered: Telephone Calls A researcher knew that…

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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Data: x1 = [1,2,3,4,5,6],x2 = [3,2,1,1,2,3],y = [20,30,10,20,50,60] parameters: b0 = −20.33,b1 = 7.71,b2 = 12.5 Answer the following by hand showing all worked out parts. •Write down the equation for ˆy •What are the values of ˆy for the independent values? •What is the SSE? •What is the MSE? •What is the SSY? •What is R2 •What is F? (also state the degrees of freedom) •Is that value of F significant?
Over doses from opioids have captured the national spotlight. Rightly so they kill nearly 30,000 Americas a year and cause more than 1 million hospitalizations. However, the misuse of over-the-counter pain medications (e.g. Tylenol, Advil, Aleve) can cause stomach bleeding, ulcers, liver disease and, in some cases, death. Approximately 80% of Americans use these medications to relieve headaches, backaches, sore muscles, and reduce fever but they are unaware of the dangers if the drugs are not used correctly. A random sample (n=101) of adults were given a questionnaire to ask the question "How often do you use pain medication in one day?". Using the output, histogram, box- whisker plot, and the QQ Plot attached - check the assumption of normality for this data. PainNormalityInformationoutputhistbox 210317.pdf The assumption of normality was checked by comparing the and the median. This suggests that the distribution is slightly The + The is between the acceptable range of -3 and +3.…
Variable name Variable label Person Participant number Age Age (years) Height Height (cm) preweight Weight before the diet (kg) Diet Diet weight10weeks Weight after 10 weeks (kg) From the given table determine whether these variables are eg, (nominal, ordinal, continuous)
Source Value Std Err P value Intercept 26272.327 674.907 38.927 <0.0001 BA 35451.244 580.632 61.056 <0.0001 Female -17064.762 495.537 -34.437 <0.0001 FemalexBA -10509.614 824.520 -12.746 <0.0001 Age 533.753 14.074 37.925 <0.0001 Hours -1.698 0.878 -1.934 0.061 In an attempt to evaluate the difference in the impact of a degree on income by gender a researcher filters their data down to just individuals with a High School Diploma or a Bachelors Degree and gets the results shown above. a. How much does a Bachelors Degree increase the income for a woman? b. How much is the difference in the impact of a Bachelors Degree for women compared with men? c. What would the income be for a 52 year old male with a Bachelors Degree, who works an average of 50 hours a week?
H.: µ = 47.6 and H, : µ < 47.6 where u = the mean age of teachers at Ravenwood High School. The calculated p-value is 0.023. What conclusion will you make at a = 0.10? O Reject the H. O Fail to reject the H. O Reject the H. O Fail to reject the Ha
Identify the variables - Students who spend more time playing video games and working each week will have a lower GPA. 3. State the two quasi-independents variable and the one dependent variable (make sure to label each as QIV or DV)
For each of the variables described below, indicate whether it is a quantitative or a categorical (qualitative) variable. Also, indicate the level of measurement for the variable: nominal, ordinal, interval, or ratio. Make sure your responses are the most specific possible. Variable Type of variable Level of measurement (a)Temperature (in degrees Fahrenheit) Quantitative Categorical Nominal Ordinal Interval Ratio (b)Exchange on which a stock is traded (NYSE, AMEX, or other) Quantitative Categorical Nominal Ordinal Interval Ratio (c)Letter grade (A, B, C, D, or F) Quantitative Categorical Nominal Ordinal Interval Ratio

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