In a survey, 10 people were asked how much they spent on their child's last birthday gift. The results were roughly bell- shaped with a mean of $34 and standard deviation of $6. Construct a confidence interval at a 80% confidence level. Give your answers to one decimal place. ——

Q: Find the 94th percentile, P94,  from the following data 1000 1100 1400 1500 1600 1800 1900 2000…

A: Given,sample size(n)=35the given data is already arranged in ascending order.

Q: DESCRIPTIVE STATISTICS Table 2.30 Frequency Distribution of Family Incomes

A: Given : Family Income  Frequency (f) Cumulative freqeuncy  (CF) 10,000 - 11,999 12 12 12,000…

Q: A medical test is available to determine whether a patient has a certain disease. To determine the…

A: Given information: Total number of people tested = 10100   Only 100 of these people have the…

Q: The thickness (in millimeters) of the coating applied to hard drives is one characteristic that…

A: As asked, I have answered question number D only. Please find the solution below. Thank you.

Q: Instructions: Critique the graph and indicate the flaw. NCR CAR Ollocos Region Cagayan Valley…

A: Given information: Type of graph: Pie chart Topic: Annual per capita Poverty thresholds of family by…

Q: Battery life is an important issue for many smartphone owners. Public health studies have examined…

A: From the provided information, The data values are as follow: Primary use: Talking 35.8 22.2 24.0…

Q: Income (in Dollars) 60,000 48,000 36,000 24,000 12,000 0 Per Capita Personal Income by State for…

A: From the given histogram, which represents the "state" on the x-axis, and "per capita personal…

Q: (1 point) A manufacturer sells a light bulb that has a mean life of 1515 hours with a standard…

A:

Q: For a sample of 300 mass values, the mean is 12 is 10 g. Assuming a bell-shaped curve, which in…

A: A sample of 300 mass values with a mean of 120 g and standard deviation of 10 g n=300x=120s=10

Q: Two random variables X and Y have a joint probability density function 3 fxy(x, y) = 16 fo 0 a) Find…

A:

Q: Suppose a plywood from a supplier are suspected to contain 2% that are below specifications. One…

A:

Q: Find the Mean, Median, and Mode for Ungrouped and Grouped Data of the given data set. 55 57 58 58…

A: Given data…

Q: The purpose of this assignment is to know how to apply probability concepts to evaluate judges’…

A: Here we should calculate the probability of reversal given an appeal for each judge and rank them.…

Q: The means and standard deviations are given in the data table. With a correlation of 0.826,…

A: Given: Correlation coefficient r = 0.826 Mean of Dose X = 1.651 The standard deviation of Dose SX =…

Q: Consider a bag of marbles, 19 of which are green, 25 of which are blue, and 6 of which are red.…

A: Hi there! Thank you, for posting the question. As there are multiple sub parts, according to our…

Q: following data represent the weights (in grams) of a simple random sample of a candy. 0.92 0.90 0.89…

A: The given data is; 0.92,0.90,0.89,0.93,0.92,0.86,0.93,0.87,0.81,0.90

Q: 5. The function f(x, y) = 1080 answer to 3 decimal places ion of 0.05 seconds. What is the reaction…

A: Solution 5

Q: Construct a 90% confidence interval for the population mean, μ. Assume the population has a normal…

A:

Q: Consider a binomial distribution. If the number of trials is increased, what happens to the expected…

A: In a binomial experiment, the probability of obtaining a certain result is given by the following…

Q: (a) What is the probability that all of the guests may stay in their chairs? (b) What is the…

A: Here given,  Three guests to a tea party sit down in three chairs . Then host re arranged them…

Q: NW 3.7 Two marbles are drawn at random and without replacement from a box containing two blue…

A: Since we know that 2 marbles are drawn from box containing two blue marbles and 3 red marbles in 5C2…

Q: A purchasing manager at a university is investigating which brand of LCD projector to purchase for…

A: Given information:

Q: Find Decile 1 and Decile 2 and base your answer from the formula provided.

A:

Q: 2. The Department of Trade and Industry reported that the mean retail price per gallon of a certain…

A: Solution-: Given: μ=140.5,σ=5 Let, X= The retail price per gallon of a certain product  ∴X→…

Q: Below are the times (in days) it takes for a sample of 15 customers from Andrew's computer store to…

A: Introduction: It is required to construct a histogram using the data.

Q: $ 45 Million is as bad as not getting it (assume loss), except in case of a tie (assume win). (a)…

A:

Q: Find the coefficient of variation V for (a) the data in Table 2.29 and (b) the data in Table 2.30.…

A: The Coefficient of Variation is given by  CV=σx¯×100where σ=Standard deviation              x¯=Mean

Q: In testing a certain kind of missile, target accuracy is measured by the average distance X (from…

A:

Q: In May, the prices of a single scoop of ee [in cents] Baskin Robbins Carvel Dreyers Cinema Sweets…

A: Since you have posted a question with multiple sub-parts, we will solve first 3 sub-parts for you.…

Q: Another measure of variation is the mean absolute deviation. It is computed using the formula…

A: Given information- We have given the sample data- 976, 911, 1893, 2038 We have to find the MAD and…

Q: Conside the probabiliy distribuiton below x probability p(x) 7.6 0.5 8.4 0.5 what is the standard…

A: We have given that,  Let X be the random variable having probability distribution is,    X P(X)…

Q: Suppose that Y₁, Y₂,..., Y is a random sample of size m from Gamma (a = 3,ß= 0), where 8 is not…

A:

Q: Perform Grubb's Test and make a conclusion to accept or reject the outlier .

A:

Q: Categories of Books Sold Travel 30.1% Science Fiction 13.2 %

A: The pie chart is given. The total books are sold each month is 5400

Q: The following data represent the pulse rates (beats per minute) of nine students enrolled in a…

A: Given data: Student Pulse Perpectual Bempah 64 Megan Brooks 75 Jeff Honeycutt 62 Clarice…

Q: 14) Let X and Y be jointly continuous random variables with joint pdfs ху for 0 ≤ x ≤ 1,0 ≤ y ≤ 2 3…

A:

Q: A personnel director has hired ten new employees, whom she can assign to work in various positions.…

A: Given that A Personnel director has hired ten new employees. Number of employees hired (n) = 10…

Q: 2. The Department of Trade and Industry reported that the mean retail price per gallon of a certain…

A: Let X be the retail price per gallon has bell shaped

Q: 2. The Department of Trade and Industry reported that the mean retail price per gallon of a certain…

A: Given: Meanμ=140.50standard deviationσ=5

Q: In a packing plant, a machine packs cartons with jars. It is supposed that a new machine will pack…

A:

Q: Joen QUESTION 1 1. Assume that each of your calls to a popular radio station has a probability of…

A: Given that

Q: 3.57 Consider the experiment depicted by the Venn diagram, with the sample space S containing five…

A: Given: P(E1) =0.20 P(E2 )=0.30 P(E3)=0.30 P(E4)=0.10 P(E5)=0.10

Q: 6) The probability distribution of a random variable D is the density curve of a uniform…

A: Given X~Uniform(0.2,0.7) Result:  When X~U(a,b)  then f(x)=1/(b-a) a<x<b  And CDF will be…

Q: 0 A.; B.; or C. ? Z-distribution = 130 (approximately) A B C 2 3 Consider the figure above. A…

A: Sample size refers to how many people or subjects were involved in a statistical experiment. The…

Q: 7. A smoke detection system uses two devices, A and B. If smoke is present, the probability that…

A:

Q: Part 1 You will be presented with several relationships and will be asked to write out the null and…

A: Solution:-  1. A medical student is designing a clinical trial to test a new depression medication.…

Q: Frequency 247 20 16 12 8- 4 0+ 70.5 10 75.5 Prealgebra Exam Scores 4 80.5 19 85.5 Scores 17 90.5 15…

A: we have to find number of class containing largest number of exam scores.

Q: he number of students that took this c

A: The histogram is given with prealgebra exam scores and frequency in the class.

Q: Compute the mean and variance for the linear function W = 2X - 4Y.

A: It is given that For X, mean = 1.3, Variance = 0.21 For Y, mean = 0.3, Variance = 0.21 Cov(X, Y) =…

Q: Using the table below: a) Construct an expanded table showing relative return b) Calculate the…

A: The returns for 8 weeks with corresponding probabilities are given in the table below: Week…