Question

QUESTION 6 The do-it-yourself (DIY) consumer movement has had a profound impa A recent study conducted by the centre for consumer research examined various trails of p ct on the retailing business. ersons ssified as "do-it-yourselves" and 'non-do-it-yourselves". One factor considered age. Because younge do-it-yourselves to be younger. The age (in years) of the people in the two groups from the study are summarised as follows: r people are generally healthier but less efficient, it is reasonable to expect Sample mean 41.8 Standard deviation 15.9 Sample size 29 DIY consumers | Non-DIY consumers 47.4 16.2 34 Does the data support the hypothesis that do-it-yourselves are younger, on average than non- do-it-yourselves? Assuming the two population variances are unequal Which one of the following statements is incorrect? 1. Ho : The population mean do-it-yourselves is greater or equal to the population non-do-it- yourselves (or μ D (ND). 2. H The population mean do-it-yourselves is less than population mean non-do-it-yourselves 3. The critical value at 10% level of significance is t(61;0.10) = 1.296 4. The test statistic t1.3813 5. The statistical conclusion is to reject Ho at 10% level

Answer 1

2)nd and 3)rd statements are incorrect

as Ha : mu1 <= mu2
as critical value is -1.296 and not 1.296

Option 2 ) AND 3) are correct

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