A manager of a cafeteria wants to estimate the average time customers wait before being served. A random sample of 49 customers has an average waiting time of 8.4 minutes with a standard deviation of 3.5 minutes. Find a 90% confidence interval for the true average customer waiting time. O (8.21, 8.56) (8.26, 8.54) (7.58, 9.23) O (8.33, 8.47)

Q: A researcher obtains t = 2.48 for a repeated-measures study using a sample of n = 10 participants.…

A: Given, Test statistics = 2.48  n = 10 Two tailed test

Q: Tamara bought 7 pounds of plaster to 5 make a sculpture. After she made the sculpture, she had 13…

A: “Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: lumn A Column B 1. a. -5) | b. -4) used twice 1. x + 7x +6 C. x+6) used twice 2. d. (2x-1) 2. x² -…

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Q: 7) Cos o CsC a tana 8) Cot t Sect Sint

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A:

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Q: 2. Using both trapezoidal and Simpson rule, find the approximate values for the integral…

A: Here the lower limit is π4 and upper limit is π2

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A: Let X be uniformly distributed  Here, X ∈( 1 , 2 ) The P.D.F pf X is  fxx = 1b - a           = 12 -…

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A:

Q: Apply the backflow algorithm to the digraph below TI (11), T5 (4) Т9 (9) T2 (10) T6 (12) T8 (6) T10…

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Q: Which statement below is A. 4.3 s 4.03 < 4.33 B. 4.03 < 4.33< 4.3 C. 4.03 < 4.3 < 4.33 D. 4.33 < 4.3…

A: Solution:

Q: Read each que Tamara bought 7 pounds of plaster to make a sculpture. After she made the sculpture,…

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Q: Question 5 Find the value of b or c the given functions the given minimum value or maximum value: a)…

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Q: Which of the following expressions have the same value? Select the three that apply. A. 7 +5 X 3- (4…

A: 32) PEMDAS rule is used here. A)7+5×3-(4÷2)  =7+5×3-2   =7+15-2    =20B)7+5×(3-4)÷2    =7+5×1÷2…

Q: Complete.

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Q: *18. If f: AB is 1-1 and im f (fof ¹) (b) = b for each b E B. = B, prove that (ff)(a) =a for all a…

A: Given that is one to one and  that is  is onto also.Hence  is injective and surjective .Then  is…