The average take-out order size for Ashoka Curry House restaurant is shown. Assuming equal variances, at α = 0.05, is there a significant difference in the order sizes?   Customer Order Size Statistic Friday Night Saturday Night Mean order size x¯1x¯1 = 21.03 x¯2x¯2 = 24.78 Standard deviation s1 = 4.93 s2 = 6.29 Number of orders n1 = 13 n2 = 19   (a) Choose the appropriate hypotheses. Assume μ1 is the average order size on Friday night and μ2 is the average order size on Saturday night.   a. H0: μ1 − μ2 = 0 vs H1: μ1 − μ2 ≠ 0 b. H1: μ1 − μ2 ≠ 0 vs H0: μ1 − μ2 = 0   a b   (b) Specify the decision rule. (A negative value should be indicated by a minus sign. Round your answers to 3 decimal places.)   Reject the null hypothesis if tcalc >  or tcalc <  .   (c) Find the test statistic tcalc. (A negative value should be indicated by a minus sign. Do not round your intermediate values and round your final answer to 4 decimal places.)   tcalc

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The average take-out order size for Ashoka Curry House restaurant is shown. Assuming equal variances, at α = 0.05, is there a significant difference in the order sizes?
 

Customer Order Size
Statistic Friday Night Saturday Night
Mean order size x¯1x¯1 = 21.03 x¯2x¯2 = 24.78
Standard deviation s1 = 4.93 s2 = 6.29
Number of orders n1 = 13 n2 = 19
 


(a) Choose the appropriate hypotheses. Assume μ1 is the average order size on Friday night and μ2 is the average order size on Saturday night.
 
a. H0μ1 − μ2 = 0 vs H1μ1 − μ2 ≠ 0
b. H1μ1 − μ2 ≠ 0 vs H0μ1 − μ2 = 0
 

  • a
  • b

 
(b) Specify the decision rule. (A negative value should be indicated by a minus sign. Round your answers to 3 decimal places.)
 
Reject the null hypothesis if tcalc >  or tcalc <  .
 
(c) Find the test statistic tcalc. (A negative value should be indicated by a minus sign. Do not round your intermediate values and round your final answer to 4 decimal places.)
 
tcalc          
 
(d-1) Make a decision.
 
We   (Click to select)   reject   do not reject  the null hypothesis.
 
(d-2) State your conclusion.
 
We   (Click to select)   can   cannot  conclude that there is a significant difference in the order sizes.
 
(e-1) Use Excel to find the p-value. (Round your answer to 4 decimal places.)
 
p-value          
 
(e-2) Interpret the p-value.
 
We   (Click to select)   reject   do not reject  the null hypothesis.

 

 
 
 
 
 
 
 
 
 
 
 
 
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