A university student faces a statistics exam, which offers 4 response possibilities. The probability that said student knows the answer to the question is 80% while the probability that he asks it randomly is 20%, also if the student asks it randomly, the probability that he chooses the correct answer is 20%. 25% So if the student answers a question correctly, what is the probability that she actually knows the answer? what is the correct? a. 0.05 b. 0.85 c. None of the above d. 0.9411

Q: Approximately how many of the cars in this sample would have speeds between 90 and 120mph? b) What…

A: As per policy I have calculated first main question plz REPOST for remaining.  The speed (in miles…

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A: From the given information,      Mean = 1093.1 Standard deviation, SD = 120.6 We, have to find the…

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A: The paralogistic distribution is defined by the following probability density function (PDF):…

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A: Number of 40W bulbs = 4  Number of 60W bulbs = 5  Number of 75W bulbs = 6  Total number of bulbs = 4…

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Q: Solution is completely incorrect. please provide correct answers!

A: The sample information given for 15 customers. Thus, n = 15.

Q: What is the z multiplier for a 70% confidence level? Round to the nearest 3rd decimal place, x.xXX

A: Confidence level=70%

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A: Hypothesis Testing Hypothesis testing is a tool for making statistical inferences about the…

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A: The given values are: n1=31, x¯1=77.19, s1=11.09 n2=33, x¯2=87.66, s2=20.66

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A: Note:- "Since you have posted a question with multiple sub parts, we will provide the solution only…

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A: Number of voters 5112027122 1st choice XAXKXDK 2nd choice  A  K  D  X  K  A  A  3rd choice  K  D  K…

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A: "In a textile factory, 1,400 garments are designed and produced during the last month, of which…

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A: Let {Xt : t≥0} be a stochastic processes If the joint distribution of Xt1, Xt2,....Xtn and Xt1+h,…

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A: From the provided information, Mean (µ) = 0 Standard deviation (σ) = 1 The shaded area is to the…

Q: Directions: Given a normal distribution with = μ 410 and o 50, compute for the corresponding z-value…

A: Mean=410 Standard deviations=50

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A:

Q: What proportion of 10-year old boys is less than 140 cm in height?

A: mean  = 138  standard deviation  = 7  X=  heights of 10-year old boy

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A: Population proportion(p)=0.12 confidence level=98% Margin of error(E)=0.015

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A: standard deviation(σ)=2.1 Margin of error(E)=1.5 confidence level=95%

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Q: part c is wrong. please fix that!!

A: s=23.90 n=16

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A: The distribution is normal

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A:

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A: The data for the price change for 12 companies are given.

Q: TABLE 2-5 Time on Hold Class Limits Lower-Upper Tally Frequency 1-3 Midpoint (c) Recall that the…

A: Consider the given figure for part (e) Consider the given frequency table:

Q: You want to select a president and a secretary of the class from a group of 3 people, (Jose, Maria…

A: You want to select a president and a secretary of the class from a group of 3 people, (Jose, Maria…

Q: part c is completely wrong. please provide correct answers!!

A: here we have to use excel  enter data in excel click on XLMiner analysis  click on t-Test:…

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A: Given  n =36 P =74%    =74/100    =0.74

Q: In a simple random sample of 100  electronic components produced by a certain method, the mean…

A: From given, Random sample = 100 Mean = 125 hours Standard deviation = σ = 20 hours

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A: Population mean, μ=1200 Sample size, n=200 Sample mean, x¯=1175 Population sd, σ=120 α=0.05

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A: A random variable follows binomial distribution with p= 0.6 and n=13.

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Q: n a simple random sample of 100 electronic components produced by a certain method, the mean…

A: Here, n=100, x =125, and σ=20 The confidence level is 0.998 and E = 2.