The Vice-Chancellor of a university is concerned that illicit drug use on campus is higher than the 5% acceptable level. A random sample of 140 students revealed that 5 of them had used illicit drug during the last 12 months. Construct a 90% confidence interval to estimate the true proportion of students who use illicit drug. Should the Vice-Chancellor be concerned?

Q: 0.99 0.84 0.93 0.99 0.72 0.87 0.88 0.85 0.84 0.86 0.81 0.81 0.82 0.76 0.77 0.83 0.7 0.83 0.82 0.97 0...

A: Random samples of 50 candies with weights (in grams) given. We need to find the sample standard  of ...

Q: Suppose a population of rice grain sacks has a mean of 180 with a standard deviation of 50 kg. Using...

A: GivenMean(μ)=180standard deviation(σ)=50

Q: 3. Consider the following regression model: Weekly Hours = Bo + B1 × Wage + uj Weekly Hours is the a...

A: Given information: The regression model is given.

Q: 8 From the following pay-off table, find the best strategy i) Maximax criteria is applied ii) Maximi...

A:

Q: The lengths of Atlantic Croaker Fish are normally distributed with mean of 10 inches and a standard ...

A: Given that  X~N( μ = 10 , ? = 2 ) μ = 10 , ? = 2 , n=200 Z-score =( x - μ )/?

Q: A researcher is interested in the cumulative grade point average (CGPA) of students who enrolled in ...

A: (i) The population is the students who enrolled in Statistic course in this semester and the samplin...

Q: 5. In an Oreo factory, the mean mass of a cookie is given as 40 g. For quality control, the standard...

A: Assume, X be the random variable which follows normal distribution with Mean=μ and Standard deviatio...

Q: The weights of bags of cookies are normally distributed with mean of 15 ounces and a standard deviat...

A: Given information- Population mean, µ = 15 ounces Population standard deviation, σ = 0.085 ounce We ...

Q: Leave your answers to the following questions as factorials, permutations, or combinations with prop...

A: There are total 52 cards in a deck of cards, where are three suits, spades, hearts, club and diamond...

Q: Question 3 According to a study done by Pierce students, the height for Hawaiian adult males is nor...

A: Given that  Normally distributed with an average of 64 inches and a standard deviation of 2.0 inches...

Q: . A jury of 12 people is chosen for a trial. The defense attorney claims it must have been chosen in...

A: Givensample size(n)=12p=0.50Let "x" be the jury would have femalesx~Binomial(n=12,p=0.50)P(X=x)=(nx)...

Q: Construct a box plot for the given data.  Include values of the 5-number summary in all box plots. ...

A: Given data is,32 , 37, 41, 44, 46, 48, 53, 5557, 57, 59, 63, 65, 66, 68, 6970, 71, 74, 74, 75, 77, 7...

Q: According to a Survey, households in the city X spend an average of $24 per week on their leisure ac...

A:

Q: The adult eastern hellbender (a type of giant salamander) has a length which is normally distributed...

A: GivenFor eastern HellbenderMean(μ)=30.3standard deviation(σ)=3For Ozark hellbenderMean(μ)=33.4standa...

Q: In a sample of 90 young adults, the average time per day spent in bed asleep was 7.06 hours. Assume ...

A: Given: Sample mean 7.06 Standard deviation 1.11 Sample size 90 Confidence level 0.9

Q: From the data given below, calculate the gross and net reproduction rates : Age Group Female Populat...

A:

Q: Four microchips are to be placed in a computer. Two of the four chips are randomly selected for insp...

A:

Q: The first four moments of a distribution about the value 5 of the variables are 2, 20, 40 and 50. Ca...

A: The assumed rth moment of a variable about any point x=A (i.e., 5 in this case) is given by : μr'=∑f...

Q: Test scores Mean Median Mode Score Frequency Relative Frequency 16 INSTRUCTIONS 15.5 Save a copy of ...

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

Q: Question: Outside Magazine tested 10 different models of day hikers and backpacking boots. The follo...

A:

Q: the past 10 days. Construct the probability distribution of the driver's income in the past 10 days ...

A:

Q: Find the mean, variance, and standard deviation of the binomial distribution with the given values o...

A: Solution

Q: Find the variance with solution

A:

Q: Q4. The following spinner from Question 3 has outcomes: 2, 3 and 5. 3 2 5. What is the probability o...

A: Given Spinner

Q: Suppose that the number of customers visiting a fast food restaurant in a given day is N- Poisson(A)...

A:

Q: A sample of 60 obese adults was put on a low carbohydrate diet for a year. The average weight loss w...

A: Given: Mean = 11 Standard deviation = 9 The one tailed critical value for 99% confidence level is 2....

Q: The data given below show the number of overtime hours worked in one week per employee. Use the data...

A: Here data is given : Overtime hours and Employees We have to find out probability distribution. And ...

Q: Do doctors in managed care plans give less charity care? Researchers chose 60 communities at random,...

A:

Q: The amount of miraculin produced in a hybrid tomato plant had a mean of 105.3 micrograms per gram of...

A: Given,mean(μ)=105.3standard deviation(σ)=8sample size(n)=64

Q: Let X be a discrete random variable with range Rx = {0, ), such that Px(0) = Px() = Px() = Px() = Px...

A:

Q: Please write a summary on quadratic expressions of normally distributed random variables and their d...

A: The nx1 vector  of random varibles y is said to be distributed as a multivariate normal with mean ve...

Q: A sample of eight repair records for a certain fiber-optic component was drawn, and the cost of each...

A:

Q: Calculate Standard deviation from the following observation on a certain variable. 240.12, 240.13, 2...

A: We have given that,  Thee data set is, 240.12, 240.13, 240.15, 240.12, 240.17, 240.15, 240.17, 240.1...

Q: The mean and Standard deviation of a distribution are 90 and 6.5 respectively. Find the coefficient ...

A:

Q: deviation was 1.65 s. It has previously been assumed that the average adaptation time was at least 7...

A: Given: Sample size, n=9Population mean μ=7Sample mean x¯=6.32 Sample standard deviation s=1.65 Signi...

Q: (a) How many ways are there for a class of six kids to line up for recess? (b) The first child and l...

A: Here use basic probability rule Here total 6 kids  And they are line up for recess

Q: Calculate the quartile deviation and its Coefficient from the following data. Class-Interval Frequen...

A:

Q: A professor believes that students who smoke cigarettes tend to have lower grades. He collects data ...

A: Introduction: It is required to identify what the study was based on.

Q: The probability that an event will not happen is P (E') =0.96. Find the probability that the event w...

A: Given information- We have given the probability that an event will not happen is P(E') = 0.96 We ha...

Q: Which of the following rows shows the probabilities of the three Outcomes? ww

A: Here given spinner is shape of circle  So Total angle 360  And number  2 make 90 degree While 3 and ...

Q: Which of the following is considered evidence you can use for construct validity? examining changes...

A: Correct option is all of the above.

Q: Question 3 My friend, Ahmad, is trying to determine which of two opportunities he should invest in (...

A:

Q: .2. From heights (x;) in inches, weights (x2) in kg. and ages (x) in years of a group of students, t...

A: The cause and effect relationship between the variables are estimated using the regression model. If...

Q: Find the percentile for the data point. Data set: 51 33 41 72 74 75 32; data point 51

A: 51 33 41 72 74 75 32  

Q: Listed below are blood groups of O, A, B, and AB of randomly selected blood donors. Construct the re...

A:

Q: The length of time between arrivals at a hospital clinic has an approximately exponential probabilit...

A:

Q: Choose the correct asnwer and gime some brief explaiantion If a random sample is taken from a popul...

A: Formula : Standard error :  σₓ̄ = σ/√n

Q: Consider the following regression model: Weekly Hours = Bo + B1 × Wage + uį Weekly Hours is the aver...

A: Given information: The regression model is given.

Q: The International Center for Academic Integrity has performed a well designed survey, finding that 6...

A: Givenp=0.68sample size(n)=144mean(μp^)=p=0.68standard deviation(σp^)=p(1-p)144σp^=0.68(1-0.68)144σp^...

Q: What is the width of this graph?

A: Given that  In Histogram final grade score on X axis  Frequency on Y axis  Formula for width Width=u...