Table provided in pic attached 3A. The water pollution readings at State Park Beach seems to be lower than that of the prior year. A sample of 12 readings (measured in coliform/100 mL) was randomly selected from the records of this year's daily readings. The study yielded the following dista table. table in pic attached

(a) Which approximation is more appropriate in this problem, : ort? Be sure to justify your response. (5 points)
(b) Estimate the 95% upper confidence bound of this year's mean pollution reading. Be sure to justify all steps graphically and analytically. (10 points)

3B. Does the sample study of Problem 3A provide sufficient evidence to conclude that the mean of this year's pollution readings is significantly lower than last year's mean of 3.802?
(c) Set up the appropriate hypotheses. (5 points)
(d) Test the hypotheses with the significance level of a = 0.05. Be sure to justify all steps graphically and analytically. (10 points)

Ican figure out 20 shares multiply by $117.98 =2359.6920 shares multiply by $124.32=2486.40then take 40 shares multiply by $128.48=5139.20after that i'm lost any be greatly appreciated.

Marco has $38.43 dollars in his checking account. his checking account is linked to his amazon music account so he can buy music. the songs he purchases cost $1.29. part 1: write an expression to describe the amount of money in his checking account in relationship to the number of songs he purchases. part 2: describe what the variable represents in this situation.

High school seniors with strong academic records apply to the nation’s most selective colleges in greater numbers each year. because the number of slots remains relatively stable, some colleges reject more early applicants. suppose that for a recent admissions class, an ivy league college received 2851 applications for early admission. of this group, it admitted 1033 students early, rejected 854 outright, and deferred 964 to the regular admission pool for further consideration. in the past, this school has admitted 18% of the deferred early admission applicants during the regular admission process. counting the students admitted early and the students admitted during the regular admission process, the total class size was 2375. let e, r, and d represent the events that a student who applies for early admission is admitted early, rejected outright, or deferred to the regular admissions pool.suppose a student applies for early admission. what is the probability that the student will be admitted for early admission or be deferred and later admitted during the regular admission process?