Find the difference of upper limit of 4th class interval and lower limit of 2nd class interval
Q: We take a simple random sample of 16 adults and ask them how long they sleep on atypical night. The…
A: The objective of this question is to calculate the 88% confidence interval for the true mean time…
Q: Based on above assume you are using the moving average forecasting method based on the last four…
A: To forecast the next period using the moving average method based on the last four observations, the…
Q: The authors of a paper describe an experiment to evaluate the effect of using a cell phone on…
A: Sample size Sample mean Sample standard deviation
Q: Determine whether the following statement is true about p-value. A small p-value indicates a high…
A: The objective of the question is to understand the relationship between the p-value and the…
Q: Suppose that whether or not it rains today depends on previous weather conditions through the last…
A: The probability that it will rain today given that it has rained for the past two days is The…
Q: Find the area under the standard normal distribution curve between z=-2.44 and z=1.35. Use The…
A: It is required to find the area under the standard normal curve between the values and .
Q: 6
A: a)The correlation coefficient r is -0.9601 b) A correlation coefficient of -0.9601 indicates a…
Q: 5. Going forward, let's define x as the average number of dots after forty rolls. a. What is the…
A: Consider rolling a standard die with six faces. It is given that the die is rolled 40 times.It is…
Q: If you aim to construct a 99% confidence interval for the percentage of high school students taking…
A: The objective of this question is to determine which sample size will result in the smallest margin…
Q: Find the mode of the stem and leaf plot
A:
Q: . If the mean and median of a set of numbers are 8.9 and 9 respectively then the mode will be (a)…
A: Given , Mean = 8.9Median = 9 We have to find the mode .
Q: Based on the following frequency distribution, what would you conclude is the shape of the…
A: The frequency distribution of the test grade is given below:Test…
Q: Find the value of (XY)
A:
Q: The following table indicates the unit prices (in Rands) and quantities of three goods purchased…
A: The objective of the question is to calculate the price relative for milk and eggs, the Laspeyres…
Q: 8. Ali records the number of cars that approach an intersection. He finds that an average of 2 cars…
A: The objective of this question is to find the probability that 3 or more cars will approach the…
Q: Hupper Corporation produces many types of soft drinks, including Orange Cola. The filling machines…
A: “Since you have asked multiple questions, we will solve the first question for you. If you want any…
Q: QUESTION 2 You are told that the median for a certain exam is 53.48 and the mean for that same exam…
A: Median for a certain exam=53.48Mean for that same exam=44.23
Q: How do I calculate the EMV scale for each alternative?
A: The objective of this question is to calculate the Expected Monetary Value (EMV) for each…
Q: The following table indicates the unit prices (in Rands) and quantities of three intermediate…
A: To compute the amount, the Paasche price index, and the Laspeyres rate index, we will follow these…
Q: How do you find the maximum likelihood estimator for an exponential distribution?
A: The MLE for the parameter λ of an exponential distribution is 1/x̄.Explanation:MLE for a parameter…
Q: Green Flower Yellow Flower Purple Pod 9 6 White Pod 7 3 From the table above, find the following: 2…
A: From the provided information,green floweryellow flowerTotalPurple Pod9615White Pod7310Total16925Two…
Q: Here is a frequency distribution table (FDT) for a small data set: data value frequency 45 3 46 4 47…
A: According to the given information, we haveThe frequency distribution table is given. data…
Q: Question 4 The time taken by employees at Grace Floral shop to put a bouquet together has a normal…
A: a) 0.4503b) 27.1Explanation:Step 1:Given data : Mean μ=26.4Standard deviation σ=0.8let X be the…
Q: Click the icon to view the restaurant sales data Is there sufficient evidence at the 0.01 level of…
A: The level of significance is The sales data for the three variables lunch, dinner, and delivery has…
Q: Consider the following parameterizations of the AR(1) process with nonzero mean: Suppose we want to…
A: To estimate μ (Model 1) or θ (Model 2) via conditional least squares estimation on Y₁, we minimize…
Q: 20
A: The final is answer is -1.2502Explanation:Step 1:Step 2: Z ~ Normal(μ = 0, σ= 1) Or We use r command…
Q: Q2)A two sided hypothesis test is performed about a population proportion p.The valid alternative…
A:
Q: You are given the sample mean and the population standard deviation. Use this information to…
A: The 90% confidence interval is (62.27, 129.73).Explanation:(1−α)100% confidence interval for μ will…
Q: [2] An enchanted village is inhabited by vampires, zombies, and goblins. Every full moon: 25% of…
A: Given in an enchanted village is inhabited by vampires, zombies, and goblins. In every full moon:25%…
Q: Round off z-values to two decimal places. Express probabilities in 4 decimal places as found in the…
A:
Q: It is believed that 11% of all Americans are left-handed. A college needs to know the number of…
A: The objective of this question is to identify the random variable, population parameter, and…
Q: Which things exist in reality, and which only exist hypothetically?…
A: SUMMARY ANSWERS Sample Data and Population Distribution are real as they are actual data collected…
Q: Fifty-three percent of employees make judgements about their co-workers based on the cleanliness of…
A: Let random variable X denote the number of employees who judge their co-workers by cleanliness.p=…
Q: Provide an appropriate response. Each year advertisers spend billions of dollars purchasing…
A: From the provided information,The data values are as follow:72.7, 63, 57.4, 55.6, 30.7, 25.7, 25.2,…
Q: Let X be a random variable and a real number. Show that E(X - a)² = varX + (µ − a)² Hereμ = EX is…
A: E(X−a)2=E(X−μ+μ−a)2=E((X−μ)+(μ−a))2=E((X−μ)2+2(X−μ)(μ−a)+(μ−a)2)=E(X−μ)2+E(2(X−μ)(μ−a))+E(μ−a)2=E(X−…
Q: Weights of Elephants A sample of 8 adult elephants had an average weight of 11,700 pounds. The…
A: Given Information:Sample size (n) = 8Sample mean () = 11700 poundsSample standard deviation (s) =…
Q: Find the sample size needed to estimate the percentage of adults who can wiggle their ears. Use a…
A: From the provided information,Margin of error (E) = 0.03Confidence level = 90%
Q: Let f be the pdf of X, where c is a constant (see in photo) Solve for the value of c that will make…
A: The question is about continuous probability distribution.Given :
Q: Let Y₁, Y₂, Yn denote a random sample from a normal distribution with known mean and unknown…
A: denote a random sample from a normal distribution.The mean value is known and variance is…
Q: 16 Assume that you have estimated an AR(6) model for the time series yt, as follows: Y₁ = μ+01Yt−1 +…
A: A series which is a collection of observation of pre defined data item obtained through repeated…
Q: Following is the probability distribution for age of a student at a certain public high school. X 13…
A: The variance of ages is 1.6216.Explanation:The solution to the above problem is attached below:
Q: A random sample of n = 12 four-year-old red pine trees was selected, and the diameter (in inches) of…
A:
Q: PETROGAS is testing new filters for its motorbikes. One brand of filter (Filter A) is placed in one…
A: To address the given tasks systematically and comprehensively, let's proceed step by step, ensuring…
Q: Question 4 The time taken by employees at Grace Floral shop to put a bouquet together has a normal…
A: Explain in detail in the below.Explanation:Given Data: Mean μ = 26.4 minutes Standard deviation σ =…
Q: In 2016, the Chicago Cubs defeated the Cleveland Indians to become the champions of Major League…
A: The objective of this question is to calculate the median, first quartile, third quartile, upper and…
Q: You are interested in the effect of a factory being inspected on its pollution output, measured here…
A: When the number of reported violations goes from 9 to 10, the probability of being inspected jumps…
Q: Maya recently switched her primary doctor to one specializing in caring for elderly patients. On her…
A: a) Null and alternative hypotheses:H0:μ=115H1:μ>115 b) t-test statistic degrees of freedom = 21…
Q: The amount of time passing between successive customer "check-ins" to a downtown Calgary hotel can…
A: part -a) correct option is G) the distribution is right skewed with mean 15 minutes and standard…
Q: In the United State court system, the defendant is considered innocent until proven guilty. In our…
A: The objective of the question is to identify the statistical term that corresponds to the situation…
Q: The random variable X follows a Poisson process with the given mean. Assuming μ=5, compute the…
A: Since you have posted a question with multiple sub parts, we will provide the solution only to the…
Find the difference of upper limit of 4th class interval and lower limit of 2nd class interval
Step by step
Solved in 3 steps with 3 images
- The proportion of students who own a cell phone on college campus acress the country has increased tremendously over the past few years. It is estimated that approximately 90% of students now own a cell phone. Fifteen students are to be selected at random from a large university. Assume that the proportion of sudents who own a cell phone at this university is the same as nationwide. Let x = the number of students in the sample of 15 who own a cell phone. What is the appropriate distrubution for x?Plastic parts produced by an injection-molding operation are checked for conformance to specifications. Each tool contains 12 cavities in which parts are produced, and these parts fall into a conveyor when the press opens. An inspector chooses 3 parts from among the 12 at random. Two cavities are affected by a temperature malfunction that results in parts that do not conform to specifications. (a) How many samples contain exactly 1 nonconforming part?(b) How many samples contain at least 1 nonconforming part?A population consists of the five numbers 2, 3, 6, 8, and 11. Consider samples of size 2 that can be drawn from this population. List all the possible samples and the corresponding mean.
- Eyeglassomatic manufactures eyeglasses for different retailers. They test to see how many defective lenses they made in a given time period and found that 10% of all lenses had defects of some type. Looking at the type of defects, they found in a three-month time period that out of 34,024 defective lenses, 5840 were due to scratches. Are there more defects from scratches than from all other causes? State the Type I and Type II errors in this case.State the Type I error. Concluding that the proportion of defects from scratches is 10%, when in reality it is less than 10%. Concluding that the proportion of defects from scratches is 10%, when in reality it is higher than 10%. Concluding that the proportion of defects from scratches is less than 10%, when the proportion is actually 10%. Concluding that the proportion of defects from scratches is higher than 10%, when the proportion is actually 10%. State the Type II error. Concluding that the proportion of defects from scratches is…A concrete beam may fail either by shear (S) or flexure (F). Suppose that three failedbeams are randomly selected and the type of failure is determined for each one. Let X= the number of beams among the three selected that failed by shear. List eachoutcome in the sample space along with the associated value of XThe graduation rate from high school in a certain county is 76%. A school in that county wants to know if its graduation rate is significantly lower than the county rate. They take a random sample of 300 of the seniors who graduated last year, and find that 223 out of those 300 graduated. Calculate the p-value for this test.
- Salaries of Government Employees The mean salaryof federal government employees on the GeneralSchedule is $59,593. The average salary of 30 stateemployees who do similar work is $58,800 withs $1500. At the 0.01 level of significance, can it beconcluded that state employees earn on average less thanfederal employees?Three-circle, red-on-white is one distinctive pattern painted on ceramic vessels of the Anasazi period found at the Wind Mountain archaeological site. At one excavation, a sample of 168 potsherds indicated that 70 were of the three-circle, red-on-white pattern. How many ceramic potsherds must be found and identified if we are to be 95% confident that the sample proportion p̂ of such potsherds is within 5.0% of the population proportion of three-circle, red-on-white patterns found at this excavation site?Three-circle, red-on-white is one distinctive pattern painted on ceramic vessels of the Anasazi period found at the Wind Mountain archaeological site. At one excavation, a sample of 187 potsherds indicated that 76 were of the three-circle, red-on-white pattern. How many ceramic potsherds must be found and identified if we are to be 95% confident that the sample proportion p̂ of such potsherds is within 5.9% of the population proportion of three-circle, red-on-white patterns found at this excavation site? (Round your answer up to the nearest whole number.) potsherds
- Simple random sampling uses a sample of size n from a populaiton of size N to obtain data that can be used to make inferences about the characteristics of a population. Suppose that, from a population of 50 bank accounts, we want to take a random sample of four accounts in order to learn about the population. how many different random samples of four accounts are possible? Show steps in ExcelThree-circle, red-on-white is one distinctive pattern painted on ceramic vessels of the Anasazi period found at the Wind Mountain archaeological site. At one excavation, a sample of 174 potsherds indicated that 72 were of the three-circle, red-on-white pattern. How many ceramic potsherds must be found and identified if we are to be 95% confident that the sample proportion p̂ of such potsherds is within 5.2% of the population proportion of three-circle, red-on-white patterns found at this excavation site? (Round your answer up to the nearest whole number.)Simple random sampling uses a sample of size n from a population of size N to obtain data that can be used to make inferences about the characteristics of a population. Suppose that, from a population of 90 bank accounts, we want to take a random sample of five accounts in order to learn about the population. How many different random samples of five accounts are possible?