these 7S dog owners spent an average $1075 on their dogs in a year Suppose $175.
ID: 3072449 • Letter: T
Question
these 7S dog owners spent an average $1075 on their dogs in a year Suppose $175. Assume that these 75 dog owners are representatlive of all dog owners in terms of amount spent on their dogs in a year. The s taiaic in this probiem a O B. The sample mean, $1075, is 3.71 tmes larger than the hypothesined value of the of sample means is 371 standard deviations trom the popuiation mean of $1000 O D. The standard deviation of the distribution of sample means is 3.71 E. The sanoto mean, S10ys. 3. 71 standand devotos greater than the populaton mean, which is$1000 the nul hypolhesis "v*Explanation / Answer
The z score is (X-population mean)/population standard deviation. It tells us how many standard deviations above or below the population mean our sample mean/raw score is.
Z- score is not a standard deviation of the population data so A,C,D is incorrect. According to the above definition option b is also incorrect.
Only option E is correct which says that the the sample mean 1075 is 3.71 standard deviations greater than the population mean of 1000 as stated by the null hypothesis.
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