A poll reported that 63% of adults were satisfied with the job the major airlines were doing. Suppose

Q: A Gallup poll of 195,600 employees shows that 51% of them were actively searching for new jobs. Use…

A: n=195600, p^=51%, level of significance ɑ=0.01

Q: (a) How many possibilities are there to give 30 identical cookies to 4 kids? (b) How many…

A: To distribute 30 identical cookies among 4 kids, we can use the stars and bars method.   We can…

Q: Suppose 55% of customers order a pizza. 72% order a drink, and 48% order both a pizza and a drink.…

A: P(A)=0.55 P(B)=0.72 P(A and B)=0.48

Q: Examine the following two-factor analysis of variance table shown to the right. Complete parts a…

A: From the given information we make following calculation

Q: Let the temperature at 8 AM be the first sample, and the temperature at 12 AM be the second sample.…

A: Above Table represent  body temperatures from five different subjects measured at 8 AM and again at…

Q: 3. If cheese consumption has gone up, the Cheese Club of America will decide to spend $500,000 and…

A: A type I error occurs when the Cheese Club of America decides to spend $500,000 and hold a…

Q: Assume that adults have IQ scores that are normally distributed with a mean of μ = 100 and a…

A: X follows normal distribution with mean 100 and standard deviation 15

Q: how did you get the z a/2?

A: how did you get the z a/2?

Q: 1. What is the range of the distribution? 2. What is the interval size? 3. What is the frequency of…

A: The data is given on the age of adult patients in the hospital. Sample size (n) = 30

Q: A magazine article conducted a survey of 807 people in Phoenix metro area and found that 45% of the…

A: Sample size (n) = 807 Population proportion (p) = 45% = 0.45 And  97% confidence interval is (41%,…

Q: If X is exponentially distributed with a mean of 3, can you find a uniform distribution U[a,b] with…

A: Given that,  X~ exp(3) where, mean= 3 and standard deviation = 3

Q: write down the steps(algorithm) needed for the hypothesis testing.

A: Hypothesis testing

Q: Suppose that 84% of students in a college have a smart phone. If you select three students at…

A: sample size(n)=3 p=0.84 Let "x" be no.of students have a smart phone x~Binomial(n=3,p=0.84)…

Q: Is HDTV ownership related to quantity of purchases of other electronics? A Best Buy retail outlet…

A: Answer  Given  [O]          Y1        Y2           Y3            Total X1          15        16…

Q: The following data give the percentage of women working in five companies in the retail and trade…

A: %Working(x) %Management(y) 67 50 45 45 73 73 54 54 61 61

Q: The weights of men are normally distributed with a mean of 76 kg and a standard deviation of 8 kg…

A: Answer: From the given data, X follows normal distribution mean (μ) = 76 Standard deviation (σ) = 8…

Q: The amount of calories consumed by customers at the Chinese buffet is normally distributed with mean…

A: Note: Hey, since there are multiple subparts posted, we will answer first three subparts. If you…

Q: a) Write an introduction: • Explain the problem in general (e.g., vitamin D deficiency and…

A: Vitamin D is an important nutrient that is essential for healthy bones and teeth, as well as a…

Q: Draw a normal distribution sketch that has the same mean and standard deviation as the sample.…

A: The mean of the normal distribution, μ=67 The standard deviation of the normal distribution, σ=84

Q: From 80 of its restaurants, Noodles & Company managers collected data on per-person sales and the…

A: We have given data:   Potsticker % of Sales Per-person Spending Low Medium High Row total…

Q: A breast cancer tumour is classified as T2 if it is between 2-5 cm in diameter.  A group of 15…

A: The question is about paired t test Given : No. of group of patients ( n ) = 15 Sum of the diff. ( ∑…

Q: sed. The distribution of the number of errors per invoice for the manual system is as follows:…

A:

Q: Assume that you have a sample of n, =4, with the sample mean X, =44, and a sample standard deviation…

A: The significance level, α=0.01   Sample 1 Sample 2 Sample size n1=4 n2=7 Sample mean x1=44…

Q: A nursing home manager claims that the average number of infections per week at the hospital is…

A: The sample size is 12, sample mean is 23.5 and sample standard deviation is 3.3. The given claim is…

Q: A random sample of 985 likely voters was taken; 592 indicated that they approved a reduction in the…

A: Given Information Sample size n=985 voters   and x be the number of voters  indicated that they…

Q: (CI p# 1) You wish to estimate the population mean for salaries at a company by finding a 95%…

A: Sample size, n=30 Sample mean, x¯=40000 Population standard deviation, σ=12000 Confidence level,…

Q: A data set includes systolic blood pressure measurements from 147 adult females. If we compute the…

A:

Q: (a) between 56 and 74. % (b) above 68. % (c) below 56. %

A: here as per guideline i have calculated 3 subparts , plz repost for remainning. Suppose that the…

Q: . A simple random sample of front-seat occupants involved in car crashes is obtained. Among 2740…

A: No. of occupants not wearing a belt, n1=2740 No. of people who got killed, x1=38 No. of occupants…

Q: Assume that thermometer readings are normally distributed with a mean of 0°C and a standard…

A: Solution-: Let, X - be the thermometer readings Given: μ=0,σ=1 We want to find P(the reading between…

Q: Suppose that events E and F are independent with P(E)=0.65 and P(F)=0.72 What is P(E andF)? Round…

A: P(E)=0.65 P(F)=0.72 The events E and F are independent .

Q: Education influences attitude and lifestyle. Differences in education are a big factor in the…

A: The sample size (number of cities) where people aged 65 and over took part in survey  n1=32The…

Q: For a multistate lottery, the following probability distribution represents the cash prizes of the…

A: The probability distribution for the cash prizes of the lottery is given below, x (cash prize, $)…

Q: Assume that human body temperatures are normally distributed with a mean of 98.18°F and a standard…

A: (a) The percentage of normal and healthy persons considered to have a fever is obtained below as…

Q: Pet Place sells pet food and supplies including a popular bailed hay for horses. When the stock of…

A: X~N(mean μ=15, standard deviations σ=6) P(X>20)=?

Q: In a sample of 150 hospital emergency admissions with a certain diagnosis, 128 listed vomiting as a…

A: Sample size n =150 Favorable cases x =128 Sample proportion p^=x/n  =128/150 =0.8533

Q: The average number of Toyota Fortuner cars that you can see on your drive to work is 25, What is the…

A: Answer: From the given data, X~Poisson distribution, λ = 25 X = 29

Q: Exercise 19. Why are narrow confidence intervals better than wide ones? Discuss how n, o², and a…

A: Confidence intervals are used to estimate the range of values in which the true population parameter…

Q: Calculate the mean for the given data set, 3,6,7,9,2,18,15,12,6,11

A: Answer: From the given data, 3,6,7,9,2,18,15,12,6,11 Sample size(n) = 10

Q: For a standard normal table or Excel function find the given probability, Calculate P(Z>0.63)

A: Answer: From the given data, P(z>0.63) is,

Q: The shares of the U.S. automobile market held in 1990 by General Motors, Japanese manufacturers,…

A: A new survey of 1000 new-car buyers shows the following purchase frequencies:- Car Frequency (f)…

Q: You work for an insurance company and are studying the relationship between types of crashes and the…

A: The data table provided in the question is as follows :-     Vehicle   Type of crash Car Pickup…

Q: b. Let X1, X2, X3, and X4 represent the weight of shipment packages at a certain shipment facility.…

A: X1,X2,X3 and X4 are the independent random variables. The mean of the random variables are μ1=0.8,…

Q: For standard normal table or excel function find the given probability. Calculate the P(Z>0.18)…

A: Answer: From the given data, P(Z>0.18)

Q: L1. The sample variance of x₁,..., n E R is given by ² := 1 n-1 n i=1 (x₁ - x)², where is the sample…

A: Given the Sample Variance of x1 , x2 , x3 , x4, --- , xn ∈ R  σ^2= 1n - 1 ∑i=1n (xi - x)2 where, x :…

Q: Find the width of each interval by subtracting the lower proportion from the upper​ proportion, and…

A: First we will calculate 95% confidence interval We have given thatn = 2029x = 645p̂ = x/n = 645/2029…

Q: A and B are two events with P(A) = 0.36, P(A and B) = 0.23, P(A|B) = 0.44 Find P(B) Round to two…

A:

Q: * For standard normal table or excel function find the given probability. Calculate the…

A: We have given that  P(0.96 < z < 0.26)  This is not the correct inequality notation actually…

Q: Construct a 99% confidence interval for the slope of the population regression line. Give your…

A: The least squares regression equation ŷ = 33.67 + 33.18x

Q: The probability that a randomly chosen sales prospect will make a purchase is 20%. What is the…

A: Obtain the probability that the salesperson will make four or more sales if six sales calls are made…