Ciford es dogs. He wondered how much dog owners spend on their dogs in a year He

Question

Ciford es dogs. He wondered how much dog owners spend on their dogs in a year He hypothesized that dog owners spend more than $1000 a year on their dogs, on average. He sampled 75 dog owners in a local community and found that these 5 dog owners spent an average $1075 on heir dogs in a year Suppose $175 Assuma that hese 75 dog ones are representabive of all dog owners in tens of amount spent on teir dogs in a year The 2-statistic in this problem is 3.71. what does this mean Choose the comect answee belw answer below A. The standard devaton of the sample data3.71 O B. The sample mean, $1075, 371 standad deviations greater than the populason meen, which is $1000 if the ul hypothesistr OC. The standand devation of the distribution of sample means is 371 standard deviations from the population mean of $1000 O D. The standand deviation of the distribution of sample means is 3.71 O E. The sample mean, $1075, 3.71 tmes larper than the hypothesiced value of the populaion mean

Explanation / Answer

a z-score tells the number of standard deviations from the population mean a sample mean is.

or we can say it's a measure of how many standard deviations below or above the population mean a sample mean is.

so,here z-score is 3.71 which tells that

the sample mean ,$1075 is 3.71 std dev greater than the population mean,$1000 if null hypothesis true

so, option B is correct

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