Statistic 153 for Mercy B

Q1)Summary statistics for two samples of data aresample 1: Mean = 5 standard deviation = 12sample 2: Mean =12 standard deviation = 5which sample has a larger spread of observations?a) Sample 1b) Sample 2c) Neither, they have the sample spread.d) there is no enough information to answer this question.Q2A convenience store chain claims that the mean amount spent by a typical customer is $28.50 with a standard deviation of $ 2.50. Assume that the distribution of amounts spent is bell-shaped (symmetric).The Z- score for the amount spent yesterday by a customer which made a purchase of $32.25 =write the answer in decimal form.Is this amount unusual?Type Yes or no.Q3Consider the following ordered set of data44  49  50  51  53  57  58  6266  66  68  71  75  77  80  85What is the interquartile range (IQR)

 

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