Can anyone help me to solve those questions? Q2 and Q3. Thank you. 2. Consider t

Question

Can anyone help me to solve those questions? Q2 and Q3. Thank you.

2. Consider the following data corresponding to some Uber trip costs (in dollars) in Ottawa area taken at different dates: 21, 15, 12, 8, 48, 11, 10. (a) Compute a, the mean trip cost, and s the standard deviation, and find the median trip cost. Use the space left below to show all your work. (b) Compute the z-score for the trip cost $48. Would you consider this value as an outlier? Why or why not? Use space left below to show all your work. 3. Salaries at a large online shopping company averaged last year $85,000, with a standard deviation of $9,000. Assuming salaries distribution is quite bell-shaped, about 95% of last year'salaries lie within what limits? Use space left below to show all your work.

Explanation / Answer

(2a)

(2b)

z = (48 - 12.83333)/4.62 = 7.61

The value is an outlier since z > 3

x d = x - x-bar d^2 8 -4.8333333 23.36111 10 -2.8333333 8.027778 11 -1.8333333 3.361111 12 -0.8333333 0.694444 15 2.16666667 4.694444 21 8.16666667 66.69444 N = 6 Median = Middle value = 11.5 = 77 106.8333 Mean, x-bar = x /N = 12.83333 Variance, s^2 (Sample) = d^2 /(N - 1) = 21.37 SD, s (Sample) = (Sample variance) = 4.62

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