A class has 12 boys and 4 girls. What is the ratio of boys to girls written as a decimal? OA. 0.33 OB. 0.75 O c. 3.00 O D. 4.00

Q: An accounting office has 6 incoming telephone lines. The probability distribution of the number of…

A: Given data is

Q: Question 11 A and B are events such that P(A) = 0.49 and P(B) = 0.39. Find the following: 1. P(A and…

A: Given  P(A) =0.49, P(B)=0.39

Q: Students taking the Graduate Management Admissions Test (GMAT) were asked about their undergraduate…

A: The total number of students is, n = 3310.

Q: IQ Scores Listed below are the IQ scores of randomly selected statistics professors. What  value is…

A:

Q: Assume that the probability that a randomly selected student is obese is 0.6 and the probability…

A: P(obase) = 0.6 P(male|obase) = 0.52 p(MALE AND OBASE) = ?

Q: For a uniform random variable U~ U(9, 10), find the probability P(U > 10): P(U>10) (Round the answer…

A: Given that X~U(9,10) Pdf of X is  f(x)=1/(10-9)=1 , 9<X<10

Q: Can you give an example with real numers and theintersection unknown?

A: Let A and B are the two events, then the probability that either A occurs or the event B occurs is…

Q: Find the 82 -th percentile for a uniform random variable U with the lower limit 17 and the upper…

A:

Q: A random sample of 40 college students averaged 5 hours of sleep per night. Assume a population…

A: We have given that,  Sample size (n) = 40, sample mean or average (x̄) =5 and population standard…

Q: There is a  ________ probability that the sample proportion of households spending more than $125 a…

A:

Q: The headline in an independent paper that services a large metropolitan area stated that 32% (p =…

A:

Q: A researcher is studying a new treatment protocol to combat a certain disease. The interest is in…

A:

Q: The only way to avoid research bias is to select appropriate sampling technique. Discuss.

A: Given information: The only way to avoid research bias is to select appropriate sampling…

Q: For safety reasons, 5 different alarm systems were installed in the vault containing the safety…

A: Given that n=5, p=0.85 X~Binomial(n=5, p=0.85) X be the number of system detect theft. p be the…

Q: (d) Use StatKey or other technology to find the standard error for the estimate. Round your answer…

A: From the given data we have, Let the total number of females in a simple be n1=165 Let the number of…

Q: Find the number of outcomes in the sample space for rolling a fair die 5 times.

A: Solution-: We want to find the number of outcomes in the sample space for rolling a fair die 5…

Q: This Exercise pertains to a 2015 study¹ which took a Swedish family that ate a conventional diet…

A: Solution: According to the guidelines if multiple questions are asked only question should be…

Q: According to an SSA study, around 36% of 65-year old women will live to at least 90. If 5 65-year…

A: given data, p= women will live to at least 90=0.36n=5q=1-p=1-0.36=0.64x= live to at least…

Q: Let X be a continuous random variable. Find P(X= 7): P(X= 7) = (Round the answer to 4 decimal…

A: It is given that  X is continuous random variable.

Q: Two methods measured the CdSe content (g/L) of six different samples of nanocrystals. Do the two…

A:

Q: A researcher is testing a new product to combat pests in forests. In a planting area, 66 trees were…

A: GIVEN DATA, In a planting area, 66 trees were treated with product A, and 270 trees received product…

Q: Six analysts each made six determinations of the paracetamol content of the same batch of tablets.…

A: One-way ANOVA: It is a statistical test which is used to compare the means of two or more…

Q: procedure must be completed within 34.0 minutes?   multiple choice 2 Method A Method B Either…

A: Answer:- Given, Method A has a mean of (µ) 24 minutes and a standard deviation of (σ ) 6 minutes And…

Q: 4. A study to assess the capability of subsurface flow wetland systems to remove biochemical oxygen…

A:

Q: Question 20 For X² ~ X 25, use technology to find the probability P(X² > 13.81): P(X² > 13.81) =…

A: Excel function to find chi-square probability is as follows :  =CHIDIST(χ2, df)  This function…

Q: Question 1 Choose the appropriate term for each nota X (or I) the sample variance the sample mean…

A: We have to determine which symbols is use for given situation.

Q: What statistical analysis could be used to determine whether this region has a statistically…

A: Introduction The hypothesis is an assumption that is being tested.

Q: Question 7 For the standard normal variable Z, find the probability P(Z > -0.13): P(Z > -0.13)…

A: Given that.   X~N( 0 , 1 )   μ=0  , ?=1 (for standard normal distribution)    Z-score =( x - μ )/?

Q: For X² X 58, use technology to find the probability P(X² < 73.3): P(X² < 73.3) = (Round the answer…

A: Given that  X2 follows Chi-square distribution with df = 58

Q: If P(A) = 0.5, P(B|A) = 0.2, P(AUB) = 0.7, then P(B) = 0.7 0.1 0.3 0.2

A: P(A)  = 0.5P(B|A) = 0.2P(A∪B) = 0.7P(B) = ?

Q: If P(A) = 0.5, P(B) = 0.4, and P(A^ B) = 0.25, then P(AUB) = 0.35 0.15 0.65 0.9

A: P(A) = 0.5P(B) =  0.4P(A∩B) = 0.25P(A∪B) = ?

Q: Why is chi squared being found for 1-alpha and not 1-alpha/2

A: It is given that in the original problem, the upper bound at confidence level 95% for the population…

Q: Question 15 Find the 36 -th percentile for a uniform random variable U with the lower limit 18 and…

A: U~U(18,24)

Q: Question 17 Find the value that divides the area under the standard normal probability density curve…

A: It is given that  P( Z &lt; a ) = 0.9

Q: Question 25 For F~ F(13,8), use technology to find the probability P(F < 2.64): P(F < 2.64) (Round…

A: It is given that the F-distribution with df1 = 13 and df2 = 8.

Q: 1. Can a normal approximation be used for a sampling distribution population with μ = 61 and o = 10,…

A: (1) Answer:- Given , Mean (µ) = 61 and Standard deviation (σ)= 10  According to the central limit…

Q: Question 5 How many different ways are there to select a group of 4 out of 10 people for a group…

A: select group of 4 out of 10 people for group project in which there are no distinct roles.

Q: 2. Question: The household energy consumption in Johor is normally distributed with a mean of 200…

A: Given,sample size(n)=50mean(μ)=200standard deviation(σ)=50

Q: In a large population, 56 % of the people have been vaccinated. If 5 people are randomly selected,…

A: given data, p( vaccinated)=p =0.56n=5q=1-p=1-0.56=0.44x= no. of vaccinated

Q: local

A:

Q: Suppose that X~N(5000,400). You're considering taking a simple random sample and calculating the…

A: Given data  X~N(5000,400) μ = 5000σ = 400 sample size(n=400)  standard deviation of sample mean (…

Q: Question 16 Find the 30-th percentile for the standard normal random variable Z. The 30-th…

A: Given that Z has follows standard normal distribution with mean zero and standard deviations one.…

Q: A researcher is studying wood volume production in forested areas. Wood volume data were collected…

A: The data is given as follows : Portion Area A Area 2 1 65 50 2 70 62 3 63 50 4 76 61 5…

Q: Define "power" in relation to hypothesis testing.

A:

Q: University of Michigan provides a quarterly measure of consumer opinions about products and…

A: According to the given information in this question We need to find 99% confidence interval

Q: Question: What is the mean of a sample of 100 data points collected from a population of 1000…

A: Introduction: Conditional probability is a concept in probability theory that describes the…

Q: Systolic Blood Pressure Assume that the mean systolic blood pressure of normal adults is 120…

A:

Q: Find the probability that there are three H when a fair coin is flipped four times. (Round the…

A: given data  flip fair coin four times P(head)=P(tail) = 0.5 n = 4  x = no. of time head tossed…

Q: Consider a discrete random variable, X. Identify the correct statement for using the cumulative…

A: It is given that the X be a discrete random variable.

Q: spañol) A coin-operated coffee machine made by BIG Corporation was designed to discharge a mean of…

A: Given that Margin of error=E=0.06