Project #20516 - statistics

 

Directions:

Review the SPSS output file which reports the results of the independent t-test to compare the mean price per 6-pack for regular vs. reduced calorie brands of wheat beer. Answer the following questions based on your observations of the SPSS output file:

  1. Is the F-value for Levene's Test for Equality of Variances significant (that is, is the p < .05)? What is the exact significance level? Note: if the Levene's Test for Equality of Variances is significant, then equal variances cannot be assumed.
  2. Which t-value should you use now that you know whether or not equal variances can be assumed? What is that t-value?
  3. What is the two-tailed significance level for that t-value? State the exact significance value. Report the results of the t-test as follows: t(df value) = ___, and p-value. 
  4. Is there a statistically significant difference between the price per 6-pack of regular beers versus reduced calorie beers?
T-TEST GROUPS=Reducedcals(0 1)

 /MISSING=ANALYSIS

 /VARIABLES=price

 /CRITERIA=CI(.95).

 

 

 

T-Test

 

 

Notes

Output Created

07-JUN-2013 11:20:55

Comments

 

Input

Data

C:\Users\donn\Documents\GCU Leadfac\Project with Judy for modifying PSY845 to introduce SPSS\drinks database -revised for course applications DH.sav

 

Active Dataset

DataSet1

 

File Label

                      SPSS/PC+

 

Filter

<none>

 

Weight

<none>

 

Split File

<none>

 

N of Rows in Working Data File

35

Missing Value Handling

Definition of Missing

User defined missing values are treated as missing.

 

Cases Used

Statistics for each analysis are based on the cases with no missing or out-of-range data for any variable in the analysis.

Syntax

T-TEST GROUPS=Reducedcals(0 1)

 /MISSING=ANALYSIS

 /VARIABLES=price

 /CRITERIA=CI(.95).

Resources

Processor Time

00:00:00.02

 

Elapsed Time

00:00:00.01

 

 

 

 

 

 

Group Statistics

 

Regular or reduced calorie for brand

N

Mean

Std. Deviation

Price per 6-pack for brand

Regular

28

3.1154

1.24040

 

Reduced Calories

7

2.6757

.21870

 

Group Statistics

 

Regular or reduced calorie for brand

Std. Error Mean

Price per 6-pack for brand

Regular

.23441

 

Reduced Calories

.08266

 

 

 

 

F

Sig.

 

 

 

Price per 6-pack for brand

Equal variances assumed

6.987

.012

 

Equal variances not assumed

 

 

 

Independent Samples Test

 

 

t-test for Equality of Means

 

df

Sig. (2-tailed)

Mean Difference

t

Price per 6-pack for brand

Equal variances assumed

33

.362

.43964

.924

 

Equal variances not assumed

31.912

.086

.43964

1.769

 

Independent Samples Test

 

t-test for Equality of Means

 

Std. Error Difference

95% Confidence Interval of the Difference

 

 

Lower

Upper

Price per 6-pack for brand

Equal variances assumed

.47576

-.52829

1.40758

 

Equal variances not assumed

.24856

-.06671

.94600

 




Information has been gathered on 35 brands of wheat beer. Qualitative (categorical) information has been given codes. Information that is in numerical form (e.g., $ amount) does not need to be coded.

Here are all the types of information gathered on these beers:

1.
Product name (abbreviation of product’s brand name)
2.
Product ID code
a.
Codes: Each brand is given a numerical ID, with 1 being the first one to 35 for the last one
3.
Rating assigned to the product by a taste expert  for each brand
a.
Codes:1 = Very good

2 = Good

3 = Fair

4.
Recommended by leading beer connoisseur magazine?
a.
Codes:  0 = no

1 = yes 

5.
Country of origin for each brand:
a.
Codes:1 = USA

2 = Canada

3 = France

4 = Holland

5 = Mexico

6 = Germany

7 = Japan

6.
Availability in the USA for each brand
a.
Codes:1 = National

2 = Regional

7.
Price per 6-pack for each brand (values are in US Dollars)
8.
Cost per 12 fluid ounces for each brand (values are in US Dollars)
9.
Calories per 12 fluid ounces
10.
Sodium per 12 fluid ounces for each brand (values are in milligrams, mg)
11.
Alcohol by volume for each brand (values are percents, %)
12.
Price class for each brand
a.
Codes:0 = Not classified

1 = Super premium

2 = Premium

3 = Popular

13.
Regular or reduced calorie for each brand
a.
Codes:0 = Regular

1 = Reduced calorie

14.
Number of US states in which brand was sold in 2008.
15.
Number of US states in which brand was sold in 2012.












Subject Mathematics
Due By (Pacific Time) 01/07/2014 08:00 pm
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