find the mean, variance, and standard deviation of the number who use e-mail.

Q: Can the steps be shown in excel please

A: The mean is 30 and the standard deviation is 5.

Q: Lottery Prizes A lottery offers one $800 prize, one $700 Prize, three $300 prizes, and four $100…

A: PROBABLITIES OF GETTING REWARD : - total tickets sold = 1000 number of prices for $ 800 = 1 number…

Q: An HIV clinical trial with 1151 subjects was conducted. We will focus on two variables from this…

A: From the given information, n = 1151 and k = 3 (number of treatments).

Q: two random independant variables X and Y with distributions:  X ∼ Poisson(λ) og Y ∼ Poisson(2λ), and…

A: Solution: From the given information, X follows Poisson distribution with parameter λ and Y follows…

Q: A sports reporter conducts a study of the fans' overall satisfaction with the sporting event after…

A:

Q: Life on Other Planets Forty-six percent of people believe that there is life on other planets in the…

A: Givensample size(n)=100x=40sample proportion(p^)=xn=40100=0.40significance level=0.01

Q: b) Create a 95% confidence interval for the average number of chips in bags of Chips Ahoy! cookies.…

A: From given data we have : 1132,1345,1087,1244,1419,1191,1135,1270,1295,1214,1121,1258,1325,1356 mean…

Q: Market research participants could be selected in a by putting all names into a bowl, mixing them…

A: Given that, Market research participants could be selected in a by putting all names into a bowl,…

Q: Parts IV and V please

A: Part (iv) The cumulative distribution function (c.d.f) of X, for x=0,1,2,3,4,5,6…

Q: A volume of sediment is being measured in a geological survey. The depth of the sediment is measured…

A:

Q: Sample mean x is the point estimate for population standard deviation o. True O False

A: Followings are the explanation of the question We know that  1) Point Estimate:- It is defined as a…

Q: In a growing industry, the mean number of hours of productivity lost by employees per week due to…

A: Given,mean(μ)=8standard deviation(σ)=2

Q: Out of 500 people sampled, 35 had kids. Based on this, construct a 99% confidence intervalul…

A: given data  n = 500 x = 35 99% ci for p = ?

Q: the Lakers beat the Heat in the NBA championship. Beth is a Lakers fan. Alex is Heat fan. Even…

A: Here, the test is conducted to check which team had the better players during the regular season in…

Q: uppose that 1000 customers are surveyed and 850 are satisfied or very satisfied with a corporation's…

A: Given x=850 n=1000

Q: Yvon Hopps ran an experiment to determine the optimum power and time settings for microwave popcorn.…

A: Given: n = 8 Confidence level = 95% Formula Used: Confidence Inerval = X ± t* sn

Q: 5. pg 166 European population growth Many populations grow exponentially. Here are the data for the…

A: Here population (in millions) is dependent variable (Y) and year since 1700 is independent variable…

Q: Today due to COVID-19 virus pandemic in the USA, full-time college students report spending a mean…

A:

Q: Consider a normally distributed random variable X with a mean u = 30 and a standard deviation ? = 2.…

A: GivenMean(μ)=30standard deviation(σ)=2

Q: Truck Inspection Violations The probabilities are 0.1, 0.4, and 0.5 that a trailer truck will have…

A: Binomial distribution has an event occur with two outcome multiple number of times. If two or more…

Q: In a survey, 18 people were asked how much they spent on their child's last birthday gift. The…

A:

Q: Listed below are prices in dollars for one night at different hotels in a certain region. Find the…

A: arrange data in accending order  82,146,193,203,240,243,273,300   x x2 82 6724 146 21316…

Q: What is the probability that a randomly selected package of grapes weighs more than a randomly…

A:

Q: Cloud seeding has been studied for many decades as a weather modification procedure (for an…

A: Given n=20 18.0, 30.7, 19.8.27.1, 22.3. 18.8, 31.8.23.4, 21.2, 27.9, 31.9, 27.1, 25.0, 24.7, 26.9,…

Q: verify the details of the vendor invoice with a purchase order and a receiving report before…

A: Option D is the answer. Answer : Block Sampling.

Q: Noel, a 35 year old office worker, has been struggling with his weight for a long time. Heislooking…

A: It is given that  Mean, μ = 220.6 Standard deviation, σ = 96 Z-Score, Z = ( X - μ )/σ

Q: A researcher rcher believes that the mean earnings of top-paid actors, athletes and musicians are…

A: Here we’ve to compare 3 group means so we use ANOVA. Let A represents group of Actor, B represents…

Q: For parts a and b, round all number values in your answer to the nearest hundredth. a) The linear…

A: X Y 0 28 1 24.5 2 20.4 3 17 4 15.5 5 13.9 6 12.7 Note that here we will solve this…

Q: For a normal distribution with a mean of 400 and standard deviation of 20, approximately what…

A: GivenMean(μ)=400standard deviation(σ)=20

Q: An article reported that for a sample of 59 kitchens with gas cooking appliances monitored during a…

A: given data, n=59sample mean :x¯ =654.16sample standard deviation : s=…

Q: Suppose a regression model with 34 observations was specified as: y = Bo + B₁₁+ B₂x₂ + B ₂x3 + B₁ 4…

A: Given that: The multiple regression equation is given as:…

Q: Draw rough box plots for the following two figures separated by a black bar 4 BI U A A XX₂E 12pt…

A: The first histogram is roughly normal and there are no outliers in histogram (i).  So while creating…

Q: Suppose you found the number the probability of women meeting the height requirement to be .6603 and…

A: Option D is the false statement. Explanation : probability of men meeting the height criteria is…

Q: If n=15, x=47, and s=17, construct a confl from a normally distributed population. Give your answers…

A: given data,n=15X¯=47S=17CI=0.99α=1-0.99 =0.01df= n-1 =15-1 =14normal distribution ,

Q: Construct a 95% confidence interval for the true difference in mean scores for these two groups.…

A: From given data we have : Age group Mean score Population standard deviation sample size 19-24…

Q: Please please how to write if based on the following tables, identify the test, interpret the…

A: In the given situation,  The dependent variable is Gallons Per 100Miles. The independent variables…

Q: A simple random sample of size n = 14 is drawn from a population that is normally distributed. The…

A: given data sample size (n) = 14sample mean ( x¯ ) = 64sample standard deviatio (s) = 1890% ci for…

Q: Can you also solve D from the problem above?  d. P(0 ≤ Z ≤ z) = 0.306

A: We will use Excel to find the required value of z.

Q: Use the following Sales Data to  a) Develop a 4-month moving average forecast, a forecast for…

A: Given information: The probability density functions for the continuous random variables X and Y are…

Q: The benefit of including three (or more) levels in a single factor is that such designs…

A: Solution: Here, it is needed to select one of the four options.

Q: Suppose an SAT preparation course makes the following statement in their advertising brochure: “We…

A: Given that, An SAT preparation course makes a statement in their advertising brochure. The statement…

Q: Food Availability 7. Circle the correct answer. Would you expect the p value to be: p> 0.05 p<0.05…

A: An error bar graph depicts how the food availability compares to the number of offspring.  To check…

Q: Olestra is a fat substitute approved by the FDA for use in snack foods. Because there have been…

A: The given problem is asking to compute the 98% CI for the difference b/w the two true proportions.

Q: A certain test preparation course is designed to help students improve their scores on the GRE exam.…

A: Given data is6,12,11,13,26sample size(n)=5confidence level=95%

Q: The Centre of Student Experience (CSE) needs to know freshmen' average spending at UNIMY on campus…

A: The study is to know about the average spending at UNIMY on campus supplies, food, stationery, and…

Q: You are considering taking a job at a certain company. You find the salaries of 15 people working at…

A: From the above data  We are given that the values 32,36,38,38,38,43,44,45,53,55,58,58,60,80,95 Find…

Q: A researcher wishes to estimate the proportion of adults who have​ high-speed Internet access. What…

A:

Q: he data used is from college campuses. The variables used in the analysis below include: crime,…

A:

Q: Sheet 2 a. Using information from sheet 1, construct, for the two data sets, the following: i.…

A: From part (b)Table 1: Persons with secondary education- To calculate relative frequency, Relative…

Q: Waiters at a restaurant chain earn an average of $246 per shift (regular pay + tips) with a standard…

A: