If A and B are mutually exclusive events with P(A)= 0.28 and P(B) = 0.36 Calculate P(A or B)?

Q: Find the mean and variance for the binomial distribution, n=18 , P= 0.68 Round to two decimals

A: Answer: From the given data, sample size(n) = 18 p = 0.68

Q: Which of the following is NOT a requirement for using the normal distribution as an approximation to…

A: When the sample size is quite big, the normal approximation is utilized. A normal random variable…

Q: 24 hours fitness wants to determine whether the number of days per week that college students spend…

A: Here ,  There are two categorical variables (Days per week spend exercising) & (Gender)  Here…

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: We wish to know if we can conclude that the mean daily caloric intake in the adult rural population…

A: From the provided information, Sample size (n) = 500 Sample mean (x̄) = 1985 Sample standard…

Q: Develop the likelihood ratio test for testing Ho: μ-2 versus Ha: u# 2 in a Poisson distribution.…

A: First, let's start by defining the null hypothesis and alternative hypothesis: Ho: μ-2 Ha: µ≠2 where…

Q: CCN and ActMedia provided a television channel targeted to individuals waiting in supermarket…

A: CCN and ActMedia provided a television channel targeted to individuals waiting in supermarket…

Q: An epidemiologist is worried about the prevalence of the flu in East Vancouver and the potential…

A: Sample of size n=334 people with favourable number of people had flu x=31 Then the proportion of…

Q: d. What gas mileage represents the 75th percentile? e. What gas mileages separate the bottom 3% and…

A: Mean=M=24.8, Standard deviation=S=6.2

Q: (d) Would you expect the proportion of stay-at-home residents to be higher in Virginia than in…

A: (D) Would you expect the proportion of stay-at-home residents to be higher in Virginia than in…

Q: Test the claim that the mean GPA of night students is significantly different than 2.2 at the 0.01…

A: Solution-: Given: x¯=2.22,μ0=2.2,n=80,s=0.06,α=0.01 We want to find, (a) State the null and…

Q: When students use the bus from their dorms, they have an average commute time of 8.263 minutes with…

A: Mean=M=8.263, Standard deviation=S=2.9321 P(X>a)=75.67%

Q: The data set below shows private housing units started per thousand of population in a country over…

A: The question is about forecasting Given :   To find : Simple 5 point centered mov. avg.

Q: NT #2 You wish to test if the proportion of adults in a small town who are fully vaccinated differs…

A:

Q: 2. An article in Wear (1992, Vol. 152, pp. 171-181) presents data on the fretting wear of mild steel…

A: The independent variable is oil viscosity The dependent variable is wear volume We have to find the…

Q: Proper nutrition is critical for maximizing brain function and enhancing learning. There is…

A: Q-1 Null hypothesis (H0): There is no significant difference between orphans and non-orphans in the…

Q: For bone density scores that are normally distributed with a mean of 0 and a standard deviation of…

A: Let X be the bone density scores follows nor al distribution with mean 0 and standard deviation is…

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: The heights of adult men in America are normally distributed, with a mean of 69.5 inches and a…

A: Heights of adult man in America are normally distributed with Mean(μ)=69.5 standard…

Q: B2. Let A₁,..., An> 0 and let X₁,..., Xn be independent random variables with common mean E(X) = μ…

A: This question deals with the minimum variance of the estimator μ^(X1,X2,...,Xn) for the mean μ given…

Q: 8…

A: Answer:- Given distribution table is, x P(x) 0 0.104 1 0.356 2 0.396 3 0.144 Total…

Q: The Acme Company manufactures widgets. The distribution of widget weights is bell-shaped. The widget…

A: Population mean, μ=53 Population standard deviation, σ=4

Q: The confidence interval estimate is mi/h <o< (Round to one decimal place as needed.) mi/h. Does the…

A: Let σ be the population standard deviation. Sample size (n) = 12 Confidence level (C) = 95% = 0.95…

Q: p. P(Z ≥ 1.4) = Ketch the curve corresponding to this probability Shade: Left of a value -4 -3 -2 ✓.…

A: Z has follows standard normal distribution with mean zero and standard deviation one.

Q: Suppose that the mean and standard deviation of the scores on a statistics exam are 81.7 and 6.75,…

A: The question is about normal distribution Given : Popl. mean score on stats exam ( μ ) = 81.7 Popl.…

Q: Find the indicated IQ score. The graph to the right depicts IQ scores of adults, and those scores…

A: Let , random variable X be the IQ score  The random variable X follows Normal distribution with mean…

Q: The weights of 4 randomly selected bags of potatoes labeled 20 pounds were found to be 20.5, 21.3,…

A: The data set are :- 20.5, 21.3, 20.8, 21.2 Then,  90% confidence interval?

Q: Using the same chart/data.   To the nearest​ million, how much should the grand prize be so that you…

A: For the lottery to be profitable, we need E(X) - 1 &gt; 0. If the cost of a lottery ticket is $1,…

Q: Suppose that in a random selection of 100 colored candies, 22% of them are blue. The candy company…

A: Sample size(n)=100 sample proportion(p^)=0.22 and α=0.01

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

A: As per our guidelines I can solve only first 3 subparts. Kindly post the remaining subparts again…

Q: 6. Many states are carefully considering steps that would help them collect sales taxes items…

A: From the provided information, Confidence level = 98% Margin of error (E) = 0.02 Since, no prior…

Q: Look at the ANOVA table. These are the results of an experiment that was done to test whether C…

A: a) -  To test the significance, first we define the hypothesis's 1-)  Null hypothesis (H0): There is…

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: Mr. Guo and Mr. Lange receive many spam emails every day. They each randomly choose 14975 emails…

A: Hi! Thank you for the question, As per the honor code, we are allowed to answer three sub-parts at a…

Q: hat is the percentage change in the airfare for the one-year period?

A: Need to calculate the percentage change in airfare for the one-year period

Q: Do your answers suggest that it is reasonable to believe the claim that the administrators have been…

A: The approximate probability that the percentage of male administrators will be 60​% or​ more is…

Q: 1. Consider the model y = Bo+B₁x +€. Explain in your own words what the central limit theorem tells…

A: step-by-step explanation of the central limit theorem in the context of the model y = βo + β1x + e:…

Q: Suppose a random sample of n measurements is selected from a binomial population with probability of…

A: From the provided information, Probability of success (p) = 0.14 a) n = 4000 b) n = 1000 c) n = 250…

Q: Thanks to Gregor Mendel's famous experiments in the 1800s, we know that in a hybridization event…

A: An event is the outcome of an experiment. If an experiment is repeated n times with two outcomes…

Q: The marketing department at Skywalker Inc. has just realized that its competitor, Vader Enterprises,…

A: μ=100, σ=20

Q: Find the value of the standardized z-test statistic.

A: Null and alternate hypothesis  H0: μ1 = μ2H1 : μ1 &gt; μ2 x1¯ = 35.4 x2¯ = 32.7s1 = 1.23s2 =…

Q: 3. Suppose you were testing Ho: μ-3 versus Ha: μ-2 in a Poisson distribution. f(x) =μ*e*¹/x!…

A: X~Pois(μ) Ho: μ=3, vs H1: μ=2

Q: A confidence interval for a population mean has length 26 a) Determine the margin of error. b) If…

A: Answer:- Given, A confidence interval for a population mean has length 26.  That is, Width of the…

Q: During the first 13 weeks of the television season, the Saturday evening 8:00 P.M. to 9:00 P.M.…

A: During the first 13 weeks of the television season, the Saturday evening 8:00 PM. to 9:00 PM.…

Q: In a study on the physical activity of young adults, pediatric researchers measured overall physical…

A: Mean(μ)=325 standard deviation(σ)=90 sample size(n)=100

Q: Calculate the mean for the given date set, 23,15,34,16,35,18,28,33,25,45

A: Answer: From the given data, 23,15,34,16,35,18,28,33,25,45 Sample size (n) = 10

Q: 3. In a survey of 2241 adults in a recent year, 650 say they made a New Year's resolution to eat…

A: Sample size n =2241 Favorable cases x =650 Sample proportion p^=x/n  =650/2241 =0.2900490852 =0.2900

Q: a. Test the claim using a hypothesis test. Consider the first sample to be the sample of subjects…

A: Given that 40 of the 46 subjects treated with echinacea develop infection and 93 of the 110 placebo…

Q: Assume that the sample is a simple random sample obtained from a normally distributed population of…

A: The given confidence level is 99% and the sample standard deviation s is within 50% of σ.

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…