.a. What is the probability that a student scored below 91 on this exam? The probability that a student scored below 91 is 0.9564. (Round to four decimal places as needed.) b. What is the probability that a student scored between 72 and 99? The probability that a student scored between 72 and 99 is 0.8392. (Round to four decimal places as needed.) c. The probability is 25% that a student taking the test scores higher than what grade?

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A:

Q: c. What is the probability that Z is between 1.56 and 1.84? The probability that Z is between 1.56…

A: Z = x-μσ~N(0,1)

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A: Given problem Given that   Mean = 80 Standard deviation = 8  P( 76 ≤ x ≤ 81 ) = ?

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A:

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A: Given:  p = 0.40p=0.40 n= 2000n=2000 The mean is computed as: The standard deviation is computed…

Q: Suppose x has a distribution with ? = 17 and ? = 16. (a) If a random sample of size n = 43 is…

A: X is a random  variable  mean=17 standard deviation=16 We know that Z=x- mean/standard deviation z…

Q: Suppose x has a distribution with ? = 15 and ? = 9. (a) If a random sample of size n = 35 is drawn,…

A: Given Information:  Mean (u) = 15  Standard deviation (s) = 9

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A: The probability of an event is defined as,

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A: Addition Rule:For any two events A and B the addition rule states that, P (A or B) = P (A) + P (B) –…

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A: Given that marital status of a certain population, ages 18 or older, in millions.

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Q: Appendix A Statistical Tables a. What is the probability that 336 or more companies outsourced some…

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Q: Suppose x has a distribution with ? = 12 and ? = 5.   (a) If a random sample of size n = 39 is…

A:

Q: Suppose x has a distribution with ? = 15 and ? = 14  (a) If a random sample of size n = 39 is…

A:

Q: WHAT IS THE PROBABILITY OF Randomly selecting someone who is between 20 and 34 years old

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A:

Q: d) What is the probability that a randomly selected value from this population is between 112 and…

A: We have,  A random variable is normally distributed with mean (mu) = 120, and standard deviation…

Q: (b) What is the probability that a movie is either a comedy or produced by Warner Bros? Round your…

A: We have to find given probabilities.

Q: Suppose x has a distribution with ? = 10 and ? = 3. If a random sample of size n = 71 is drawn,…

A: Solution-: Given: μ=10, σ=3, n=71 We find, (a) μX¯=? , σx¯=? (b) P[10≤<X¯≤12]=?

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A: Given , p=0.5 n=20 Mean E(x)=?

Q: a. What is the probability that a sample of taxpayers from this income group who have itemized…

A: Here AS PER POLICY I SHOULD HAVE TO CALCULATE 3 SUBPART ONLY EVEN THOUGH I HAVE CALCULATED 4

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A: (a)   Obtain the probability that in the next six flights exactly four flights will be on time.…

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A:

Q: 2) The mean and standard deviation of the number of mildly strong earthquakes taking place in the…

A: Xbar=D=126, σ=E=57  P(X>F)=P(X>131)= ?  Note: This probability calculated from standard normal…

Q: d. The probability that the child will be between 5.27 and 5.67 years old is e. If such a child is…

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Q: d) What is the probability that exactly 208 of them did not get the flu? Round final answer to 4…

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Q: Mrs. Connor's statistics class has 80 students, classified by academic year and gender, as…

A: Given, Total no of outcome (N)=80 Therefore,

Q: The table below lists a random sample of 54 speeding tickets on l-25 in Colorado. 0-10 mph over…

A: Wé have to fínd givén probability.

Q: The table below lists a random sample of 53 speeding tickets on l-25 in Colorado. 0-10 mph over…

A: From the provided information,   0-10 mph over limit 10-20 mph over limit More than 20 mph…

Q: a) For a randomly selected household, what is the probability that its annual income is less than…

A: The relative frequency distribution of household incomes for families are given below Income…

Q: Suppose x has a distribution with ? = 14 and ? = 9. (a) If a random sample of size n = 38 is drawn,…

A: The random variable X follows normal distribution. The population mean is 14. The population…

Q: What is the probability when x = 1 and the mean = 10 and standard deviation = 3. c. 0.1151 %3D a.…

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Q: a. What is the corresponding z score of the age of 50 years? b. What is the probability that the age…

A: Here given Mean = 36 year Standard deviation  = 5 year x = age of teacher

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Q: Suppose that of the 300 seniors who graduated from Schwarzchild High School last spring, some have…

A: Given: 300 seniors who graduated from Schwarzchild High School. C and nor J = 30 C and J = 45 J and…

Q: Suppose x has a distribution with ? = 76 and ? = 8. Find P(72 ≤ x ≤ 77). (Round your answer to four…

A: In question, Given that, X has distribution with mean 76 and standard deviation of 8. Then we'll…

Q: What is the chance of winning the vacation given a contestant has 1 in 3 chance of selecting the…

A: Probability The term probability is defined as the chance of occurrence of an event. The probability…

Q: Find the mean of the probability distribution given below. X 0 2 4 6 P(X) 0.22 0.11 0.1 0.57

A: We have uo find mean...

Q: An Admissions Office at a university compiled the following statistics on their applicants to the…

A: From the given information,  The Probability of being accepted for ACT score 26-30 is 0.8 and the…

Q: 1. The test scores of an Engineering Mechanics class with 800 students are distributed normally with…

A: Given,sample size(n)=800mean(μ)=75standard deviation(σ)=7

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A: Given that, Total frequency is n=106. Number of persons whose body temp is greater than the accepted…

Q: X is normally distributed with ?=14 and ?= 4.   Find the probability that x is between 1 and 18.

A:

Q: (a) If a random sample of size n = 33 is drawn, find ?x, ? x and P(14 ≤ x ≤ 16). (Round ?x to two…

A: Let , X→N(μ=14 , σ=7)  Our aim is to find the following :  a)  for n=33 b)  for n=65 c) Which…

Q: A poll asked people with and without children under 18 years old if they frequently experienced…

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Q: A poll asked people with and without children under 18 years old if they frequently experienced…

A: Given Total number of people = 1030

Q: The bottom panel of figure 1 (p. 311) shows the probability histogram for the total number of spots…

A: Here probability histogram given Area under the histogram =? 1 -  chance that the total no. Of spots…

Q: If one person is selected from the population described in the table, find the probability that the…

A: We’ll answer the first question since the exact one wasn’t specified. Please submit a new question…