ZuoTi.Pro
Question

Independent-Samples t-Test A researcher wants to assess if fasting cholesterol levels differ in Type A and...

Independent-Samples t-Test A researcher wants to assess if fasting cholesterol levels differ in Type A and Type B personality men (alpha= .05). Group 1 (Type A personality): 233, 291, 312, 250, 246, 197, 268, 224, 239, 239, 254, 276, 234, 181, 248, 252, 202, 218, 212, 325 Group 2 (Type B personality): 344, 185, 263, 246, 224, 212, 188, 250, 148, 169, 226, 175, 242, 252, 153, 183, 137, 202, 194, 213

Calculate the confidence intervals for the differences between means, compare to the SPSS results and interpret them.

math   Statistics-And-Probability   
0 0
Add a comment Improve this question Transcribed image text
Next > < Previous
Sort answers by oldest

Homework Answers

Answer #1

Sample #1   ---->   1
mean of sample 1,    x̅1=   245.05
standard deviation of sample 1,   s1 =    36.64
size of sample 1,    n1=   20
      
Sample #2   ---->   2
mean of sample 2,    x̅2=   210.30
standard deviation of sample 2,   s2 =    48.34
size of sample 2,    n2=   20

Degree of freedom, DF=   n1+n2-2 =    38              
t-critical value =    t α/2 =    2.0244   (excel formula =t.inv(α/2,df)          
                      
pooled std dev , Sp=   √([(n1 - 1)s1² + (n2 - 1)s2²]/(n1+n2-2)) =    42.8901              
                      
std error , SE =    Sp*√(1/n1+1/n2) =    13.5630              
margin of error, E = t*SE =    2.0244   *   13.5630   =   27.4569  
                      
difference of means =    x̅1-x̅2 =    245.0500   -   210.300   =   34.7500
confidence interval is                       
Interval Lower Limit=   (x̅1-x̅2) - E =    34.7500   -   27.4569   =   7.2931
Interval Upper Limit=   (x̅1-x̅2) + E =    34.7500   +   27.4569   = 62.2069

0 0
Add a comment
Know the answer?
Add Answer to:
Independent-Samples t-Test A researcher wants to assess if fasting cholesterol levels differ in Type A and...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions

  • Assume we are interested in the following events: this is everything that was given    A:...

    Assume we are interested in the following events: this is everything that was given    A: DCL > 260mm,      B: TL > 180cm.      Use the data and the concept of probability as a relative frequency to estimate the probabilities (relative frequencies) of these two events and of the joint event: A and B. Are A and B independent events? P(A) = P(B) = P(A and B) = Is this most accurately categorized as an observational or experimental study?...

  • 33 On May 6, Jim Ryan borrowed $14,000 from Lane Bank at 7 % interest. Jim...

    33 On May 6, Jim Ryan borrowed $14,000 from Lane Bank at 7 % interest. Jim plans to repay the loan on March 11. Assume the loan is on ordinary interest. How much will Jim repay on March 11? (Use Days in a year table) (Round your answer to the nearest cent.) Jm repay etbook 7-1 TABLE Exact days-in-a-year calendar (excluding leap year)" Day of month 30 31 30 31 28 31 30 31 31 30 31 31 Dec Mar...

  • Download the hypothesis testing dataset from the class website. 1. This is case 1, in which...

    Download the hypothesis testing dataset from the class website. 1. This is case 1, in which the value of population standard deviation is assumed to be known. a. Compute the standard deviation of the textbook price and assume this to be the population standard deviation. Type this value in E5. b. Pick a random sample of size 15. c. Compute the mean of your random sample in E4 using the AVERAGE function. d. Calculate the standard error in cell E9...

  • Partial payments are made on the dates indicated. Use the United States rule to determine the...

    Partial payments are made on the dates indicated. Use the United States rule to determine the balance due on the note at the date of maturity. (The Effective Date is the date the note was written.) Assume the year is not a leap year. Effective Partial Payment Maturity Principal Date Amount Date Date $1900 19% Sept. 1 $500 Oct. 1 Dec. 1 $500 Nov. 1 Click the icon to view a table of the number of the day of the...

  • A partial payment is made on the date indicated. Use the United States rule to determine...

    A partial payment is made on the date indicated. Use the United States rule to determine the balance due on the note at the date of maturity. (The Effective Date is the date the note was written.) Assume the year is not a leap year. Effective Partial Payment Maturity Principal Rate Date Amount Date Date $4000 4% April 1 $1000 May 1 June 1 Click the icon to view a table of the number of the day of the year...

  • Bubba's Burgers - Statistics Question

    Sampled StoreDessert Orders Per 1,000 TransactionsStore 1185Store 2226Store 3290Store 4226Store 5255Store 6293Store 7138Store 8203Store 9276Store 10173Store 11275Store 12199Store 13213Store 14321Store 1597Store 16152Store 17319Store 18193Store 19126Store 20215Store 21186Store 22289Store 23181Store 24196Store 25183Store 2690Store 27178Store 28103Store 29173Store 30231Store 31158Store 32202Store 33234Store 34273Store 35218Store 36247Store 37223Store 38108Store 39238Store 40143Store 41206Store 42300Store 4389Store 44202Store 45250Store 46210Store 47137Store 48215Store 49204Store 50188Store 51255Store 52196Store 53123Store 54189Store 55206Store 56146Store 57136Store 58211Store 59164Store 60246Store 61324Store 62125Store 63195Store 64173Store 65179Store 6676Store 67248Store 68199Store 69223Store 70240Store 71224Store 72215Store 73222Store 74170Store...

  • need help to complete this java program // add appropriate import statements here. // These imports...

    need help to complete this java program // add appropriate import statements here. // These imports you can leave as is. import javafx.application.Application; import javafx.scene.Group; import javafx.scene.Scene; import javafx.scene.canvas.Canvas; import javafx.scene.canvas.GraphicsContext; import javafx.scene.paint.Color; import javafx.stage.Stage; /** @author yourAccountNameHere */ public class ConnectTheDots extends Application {            /*     * Do not add code to main(). Add it below in connectTheDots instead.     */     public static void main(String[] args) {         launch(args);     }         /*...

  • Hi it's python I imported a data which are so many words in txt and I arranged and reshaped with ...

    Hi it's python I imported a data which are so many words in txt and I arranged and reshaped with alphabetically both rows and columns I was successful with these steps but I am stuck with next step below is my code and screenshot import numpy as np import pandas as pd data=pd.read_csv("/Users/superman/Downloads/words_file2.txt",header=None) df_input=pd.DataFrame(data) df_output=pd.DataFrame(np.arange(676).reshape((26,26)), index = ['a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z'], columns = ['a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z']) df_output.index.name="Start" df_output.columns.name="End" df_output This below screen shot is what I have to find I have to find each word...

  • In C++ Programming: Using a single for loop, output the even numbers between 2 and 1004...

    In C++ Programming: Using a single for loop, output the even numbers between 2 and 1004 (inclusive) that iterates (loops) exactly 502 times. The outputted numbers be aligned in a table with 10 numbers per row. Each column in the table should be 5 characters wide. Do not nest a loop inside of another loop. Hint: First create and test the code that output the numbers all on one line (the command line will automatically wrap the output to new...

  • can you pls help me identifiy the correct unknown ans explain why this is the know...

    can you pls help me identifiy the correct unknown ans explain why this is the know for the unknown its not 2phenylethanol. halogens is absent, differntiate is absent , nitrogen test is absent, sulfure is absent, Br2 is absent, kmno4 absent, ignition test absent . 2,3 dnp contains ketone ,tollens no aldehdye absent aldehyde , iodoform test contains carbonyl in it . Melting point of solid ("C) (leave blank if liquid at RT): 57 degrees Celsius Boiling point of liquid...

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT