August, 2018 $250 84 September, 2018 $236 61 October, 2018 $220 70 No...

August, 2018 $250.84 September, 2018 Â Â $236.61 October, 2018 $220.70 November, 18 $230.20 December, 2018 $180.32 January 2019 $140.36 February, 2019 $160.22 March, 2019 $128.66 April 2019 $130.12 May 2019 $106.24 June 2019 $176.46 July 2019 $191.45 Pick three...

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Statistics

August, 2018
$250.84
September, 2018 Â Â
$236.61
October, 2018
$220.70
November, 18
$230.20
December, 2018
$180.32
January 2019
$140.36
February, 2019
$160.22
March, 2019
$128.66
April 2019
$130.12
May 2019
$106.24
June 2019
$176.46
July 2019
$191.45
Pick three bills from the last 12 months and change the valuesinto z-scores. What does the z-score tell you about that particularmonth?
Between what two values would be considered a normal bill?Remember, being within 2 Standard Deviations is considerednormal.

Answer & Explanation Solved by verified expert

3.9 Ratings (428 Votes)

We are given the bill charges for the last 12 months We will first calculate the mean and standard deviation of the last 12 months bill Mean of the last 12 months bill x 25084 23661 17646 1914512 x 17935 Standard deviation of the last 12 months bill 25084 179352 23661 179352 17646 179352 19145 17935211 4774 I will pick October 2018 January 2019 and May 2019 to calculate See Answer

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August, 2018	$250.84
September, 2018 Â Â	$236.61
October, 2018	$220.70
November, 18	$230.20
December, 2018	$180.32
January 2019	$140.36
February, 2019	$160.22
March, 2019	$128.66
April 2019	$130.12
May 2019	$106.24
June 2019	$176.46
July 2019	$191.45