A random sample of 40 people who owned their own business reported a yearly mean profit of $10,390 with a standard deviation of $1,346. Find the 92% confidence interval for the population mean. (Round your answers to the nearest dollar) What does this mean?

Q: A joint pdf is described below. A new random variable is formed as follows W = MAX(X,Y). Determine…

A: From the given information, fx,y=136-1+xy, 1<x<5, 0<x<3 W=MAXX,Y

Q: A smart phone manufacturer is interested in constructing a 99% confidence interval for the…

A: CI=0.99n=1688X=84p^=xn=841688=0.0498CI=0.99α=1-0.99=0.01

Q: b. Compare the mean of the population to the mean of the sampling distribution of the sample mean.…

A: C. Target        Do       An unbiased estimator.

Q: In preparing a report on the economy, we need to estimate the percentage of businesses that plan to…

A:

Q: Toss a coin twice. Find the probability of getting 1 head. (In this course, I head is taken to mean…

A: A coin is tossed twice. The sample size is 24=16. S={HH,HT, TH,TT}

Q: A 9-year-old girl did a science fair experiment in which she tested professional touch therapists to…

A:

Q: A binomial probability experiment is conducted with the given parameters. Compute the probability of…

A: Givensample size(n)=13p=0.2x~Binomial(n=13,p=0.2)P(X=x)=Cxn×px×(1-p)n-x      ; x=0,1,...,n

Q: Consider

A:

Q: Fifty-four wild bears were anesthetized, and then their weights and chest sizes were measured and…

A: The question is about testing of popl. correlation coefficient Given : Correlation coefficient ( r )…

Q: We define the ratio random variable of two random variables X and Y is Z = . (a) If X~ Binomial (3,)…

A: Given that the ratio random variable of two random variables X and Y is Z=XY.

Q: Many universities use a student's ACT score to help with admission decisions as well as placement…

A: Given data is Act score(x) GPA(y) 16 1.5 18 2.5 20 3 22 3.5 28 4 30 4.5 32 5

Q: According to a poll, 11.55% of adults in a certain country have diabetes. Suppose a researcher…

A: given data  in a country P(diabetes) = p = 0.1155 n = 122 x = 18 E(x) = ? if p = 0.1155

Q: TEST- Part 2 - Normal Curve 2. The weekly salaries of teachers in one state are normally distributed…

A: We have:-    according to given question random  variable follows normal distribution as follows…

Q: Assume both samples are SRS from the population of one-day-old male chicks. According to the stem…

A: Steam and leaf plot are used to visualize the data by splitting each observation as last digit in…

Q: A data set includes data from student evaluations of courses. The summary statistics are n=90,…

A: Givensample size(n)=90Mean(x)=3.61standard deviation(s)=0.69significance level(α)=0.10

Q: Problem 2: An item is made in lots of 200 each. The lots are given 100% inspection. The record sheet…

A:

Q: Aspirin prevents blood from clotting and helps prevent strokes. The Second European Stroke…

A: Given ,  Aspirin alone :  Sample size = n1 = 200  Number of strokes = x1= 60 Sample proportion = p^1…

Q: he test statistic of z = 2.26 is obtained when testing the claim that p > 0.24. This is a…

A: a) OPTION B ) there is one critical value , the critical value is = 2.33 Rules  :- if alternative…

Q: The chickens at Colonel Thompson's Ranch have a mean weight of 1550 g, with a standard deviation of…

A: given data  μ = 1550σ = 200normal distribution P(x>1410) = ?

Q: Find the linear correlation coefficient, r, then determine whether there is sufficient evidence to…

A:

Q: Students estimated the length of one minute without reference to a watch or clock, and the times…

A: Suppose μ is the population mean length of 1 minute estimated by all students, without reference to…

Q: Insurance companies are interested in knowing the population percent of drivers who always buckle up…

A: Givensample size(n)=381x=320sample proportion(p^)=xn=320381≅0.8399confidence level=95%

Q: A recent poll indicates that 48% of all registered voters in America plan to vote for a specific…

A: given data, p=0.48n=12q=1-0.48=0.52p(X=x)=nCx *px*q(n-x) (binomial distribution)x= no. of ragisterd…

Q: K A binomial probability experiment is conducted with the given parameters. Compute the probability…

A: Given that, n= 13 and probability p= 0.35 X~ Binomial (13,0.35)

Q: What is the square root of 35

A: Given that  Square root of 35   Calculation : Square root of 35  = 35 35  = 7 x 5 35 = 7 x 5 35 =…

Q: A popular theory is that presidential candidates have an advantage if they are taller than their…

A: Solution: Let x = President Height   and y=Main Opponent height  x y d=x-y (d-d)2 180 168 12…

Q: ´,. If f (x, y)= kxye-(x2 + y2), x ≥, y0 ≥ 0 is the joint pdf, find k.

A:

Q: Eyeglassomatic manufactures eyeglasses for different retailers. They test to see how many defective…

A: given data sample size (n) = 34714favorable outcomes (x) = 580990% ci p.

Q: One research study of illegal drug use among 12- to 17-year-olds reported a decrease in use (from…

A: Givensample size(n)=1050x=95significance level(α)=0.05

Q: A data set includes 104 body temperatures of healthy adult humans having a mean of 98.7°F and a…

A: Solution: Given information: n=104 Sample size x=98.7 Sample mean s=0.66 Sample standard deviation

Q: e selection process is biased against allowing this ethnicity to sit on the grand jury. Identify the…

A: Given n=872 P-cap=41%=0.41

Q: Many universities use a student's ACT score to help with admission decisions as well as placement…

A: From given data we have : ACT score 18 20 22 24 26 28 30 GPA 15 2 3 3.5 4 4.5 5.5

Q: A manufacturer of colored candies states that 13% of the candies in a bag should be brown, 14%…

A: From given data we have : Expected fraction (p) Observed (O) 0.13 59 0.14 65 0.13 57 0.24…

Q: What would be the P-value?

A: From the obtained results, the test statistic value is 1.808.

Q: Run the regression model in Excel

A: Given information: x y 1 9 2 7 3 5 4 3 5 0 6 -4 7 -6

Q: Suppose Burger King has run a major advertising campaign in the hopes of increasing monthly sales.…

A: The data set shows the monthly sales before and after the advertising.

Q: Many high school students take the AP tests in different subject areas. In one year, of the 144,270…

A: Given that   We have to conduct hypothesis testing for the claim that proportion of female students…

Q: Suppose that x is normally distributed with a mean of 20 and a standard deviation of 15. What is P(x…

A: given data, normal distribution, μ=20σ=15p(X≥55.40)=?

Q: Use the data in the following table, which lists drive-thru order accuracy at popular fast food…

A: given data, we have to find out the given probability for the given data, one order is selected…

Q: Let X be the amount of time (in hours) the wait is to get a table at a restaurant. Suppose the cdf…

A: P(X≥5/3)=?

Q: Marvin was doing a study comparing the population growth of his hometown in the early twentieth…

A: From the provided second graph, the population for the initial period (i.e., for the year 1980) is…

Q: There are 26 balls marked with alphabetical order A to Z. What is the of selecting vowels listed…

A: given data  26 letters of alphabet 26 balls  P(vowel  selected ) = ?

Q: Example The average number of homes sold by the Acme Realty company is 2 homes per day. What is the…

A:

Q: Use the sample data and confidence level given below to complete parts (a) through (d). A research…

A: GIVEN DATA,  n=971x=554P^=Xn=554971=0.5705CI=0.99α=1-0.99=0.01we have to find out the confidence…

Q: The average number of homes sold by the Acme Realty company is 2 homes per day. What is the…

A: To solve this problem, Poisson distribution should be used. Poisson distribution has a probability…

Q: In part B, how was 0.5 obtained?

A: When we not have any prior information about the population Proportion, generally we can assume the…

Q: process used to manufacture paint yields, on the average, 70 tons of paint each day. Yields, however…

A:

Q: 6. If X and Y are independent RVs with variances 8and 5.find the variance of 3X+4Y.

A:

Q: The overhead reach distances of adult females are normally distributed with a mean of 200 cm and a…

A: The given mean is 200 and standard deviation is 8.6.

Q: Citizens of a country were asked if they thought unemployment would increase, and 46% thought that…

A: Givensample size(n)=637x=268sample proportion(p^)=xn=268637≅0.4207significance level(α)=0.05