Suppose that water usages in American showers are normally distributed, with an average shower using 17.9 gallons, and a standard deviation of 2.5 gallons. Estimate the percentage of showers that used (a) between 15.4 and 20.4 gallons. 68.26 % more than 25.4 gallons. 0.13 X% (c) less than 12.9 gallons. 2.28 X% (d) between 10.4 and 22.9 gallons. 97.59 x%

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A: According to guidlines we are supposed to solve 1st three subpart only rest can be resubmitted

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A: Confounding variables are variables that affect both independent and dependent variables.

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A: Hypothesis is an assumption that is being tested.

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A: According to the given information, we have Total number of given celebrities = 6

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A: A stratified sampling is considered.

Q: How do I find P-value using z score?

A: P-value from Z-score

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A: Here use definition of correlation coefficient.  Correlation coefficient denoted by "r" Correlation…

Q: If events A and B are independent and P(A)= 0.32, P(B)= 0.28 Calculate P(A|B) Round to…

A: Answer: From the given data, P(A) = 0.32 P(B) = 0.28  Events A and B are independent events,

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A: (1) An omnibus test examines: (2) In order to increase the value of the F statistic, which of the…

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A: A random sample of candy stores is given below. 93 174 126 98 61 112 96 102 85 96

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A: Sample mean, x¯=255.3 Standard deviation (σ) = 65.5

Q: cenario 5.  A researcher is interested in examining whether cortisol levels are influenced by…

A: Scenario 5.  A researcher is interested in examining whether cortisol levels are influenced by…

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A: Given: A professor records the following final grades in one course.  A     A     A      B     B…

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A: Confidence level (c) = 98%  n = 21  s = 0.22

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A: Given ∑ x=751, ∑ y=64.4, Sxx=3306.74, Sxy=192.705

Q: Find the range for the given data 34,56,78,92,37,22,43,46,55,62

A: Answer: From the given data, 34,56,78,92,37,22,43,46,55,62 Sample size(n) = 10

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A: As per the Bartleby guidelines we have to solve first three subparts  TIme       Money  18…

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A: standard deviationσ=4n=36x¯=65

Q: 4) The daily output of a certain item produced by a manufacturing is normally distributed with a…

A: According to the given information, we have Mean = 1000 Standard deviation = 200

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Q: You are certain to get a heart, diamond, club, or spade when selecting cards from a shuffled deck.…

A: you are certain to get a heart diamond club or spade. We know that, Total number of cards = 52…

Q: How many different ways can the letters of ​"knitting​" be​ arranged?

A: We have given the word "knitting" Total number of letters = 8 Repeated letters- No. of n's = 2 No.…

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A: Answer: From the given data, Probability of success (p) = 0.8 number of trials (n)  =  33, X follows…

Q: 3. Air samples. An environmental study looked at suspended particulate matter in air samples (µg/m3)…

A: Data in ascending order:- 22,24,28,32,36,38,42,68 Stem-Leaf plot: 2 | 2 4 8  3 | 2 6 8  4 | 2 6 | 8

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A: Here given Carmen has a deck of cards numbered 1-10. She picks one card and flips a coin. There are…

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A: given  the weights of almonds are given Weights(kg): 36,53,78,67,92,77,59,66

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A: Sample size n =250 Sample mean=44.4 Sample standard deviation =4.2

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A:

Q: 11. и z = -0.84 z = 1.28

A: According to the given information, we have Z = -0.84 and Z = 1.28

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A: Note: Hi! Thank you for the question, As per the honor code, we are allowed to answer three…