1. Calculate the sample correlation coefficient r. r = ____. 2. Determine the critical value

Q: The following frequency distribution shows the age composition of the persons under study. Mid age…

A: 75% of 460=345 persons are equal to or above 22 years of age.  Hence, f2=345-(90+122+56+20+33)…

Q: In a study of a group of women science majors who remained in their profession and a group who left…

A: Given that   x1 = 3.09 x2 = 2.92 σ1 = 0.78σ2 = 0.78 n1 = 107n2 = 222

Q: A researcher is interested in finding a 98% confidence interval for the mean number minutes students…

A: Given that: Sample size, n = 149 Sample mean, x¯=37.9 Population standard deviation, σ=10.6

Q: Given that μ = 12 and σ = 4 . Suppose samples of size five are taken.  What is the mean of the…

A:

Q: Markov #Matrix #matrix The weather in Columbus is either good, indifferent or bad on any given day.…

A: Given that: Today Tomorrow Good Weather 60% Good    30% Indifferent   10% bad Indifferent…

Q: 2. Refer to the following preference schedule to answer parts (a)-6). C C D 8 A Second Third Fourth…

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

Q: Find the indicated probability by using the special addition rule. The age distribution of students…

A: Given that : A frequency table is given here.  First column has age groups and the second column has…

Q: If a school district takes a random sample of 53 Math SAT scores and finds that the average is 488,…

A: Given Information: Sample size n=53 Sample mean x¯=488 Population standard deviation σ=100

Q: Given the following information on the sales of Beats Headphones, n = 49, = 52.9, S = 7 Ho: μ ≥ 52…

A: Given that  Sample size n =49 Sample mean =52.9 Standard deviation s=7 But here we use estimated…

Q: Which one of the following best describes power? Group of answer choices The probability of…

A: Power of the test is related to hypothesis testing.

Q: A baseball player’s batting average is 0.320 (32%). This player batted 100 times. 1) Find the…

A: Solution Given That, A baseball player’s batting average is 0.320 (32%). This player batted 100…

Q: A nutritionist claims that the mean tuna consumption by a person is 3.5 pounds per year. A sample of…

A:

Q: a. Arrange the data as a two-way table and report how many students are in each cell. For each cell,…

A: Male Female Total Brown III I   Blue  0 II   Hazel  III II   Total

Q: For a standard normal distribution, find: P(z > c) = 0.9402 Find c. Round to 2 decimal places

A: Z follows standard normal distribution with mean 0 and standard deviation 1 P( Z > c ) = 0.9402

Q: these ans

A: NoItems Time 1 4.8 1 14.7 1 13.7 1 9.5 1 2.4 1 11.8 2 10.5 2 12 2 14.3 2 16.4…

Q: Describe the standard error of the point estimate S, and what it means? (for standard variation of…

A: The standard error of the point estimate S , is the approximate standard deviation of a statistical…

Q: An oceanographer claims that the mean dive duration of a North Atlantic right whale is 11.6 minutes.…

A: T distribution has utilized.

Q: Cynthia's Mail Order Company provides free examination of its products for 7 days. If not completely…

A: Givenan average of 2 of every 10 products  sold by company are returned for a refund λ= 8 for 40…

Q: Why is it important to determine if the underlying assumptions in a statistic are met? O Because if…

A: Answer:

Q: An electrician wants to know whether batteries made by two manufacturers have significantly…

A: Given that  Sample sizes n1=92     , n2=92      Sample means X̄1=112     , X̄2=111    ?1 =3…

Q: Determine the binomial probability formula given the number of trials and the success probability…

A: Given that : n = 6  P = 0.6    to find out  P(x = 1 ) = ??  By using the binomial distribution…

Q: Provide the rank for each number in this data set: 5, 7, 7, 8, 7 5 7 8 Question Help Question 1:…

A: Given that ; data set: 5, 7, 7, 8, 7 5 7 8  Here we use the concept of rank.  We use ascending order…

Q: The manager of a warehouse store wants to estimate the average number of laser printer toner…

A: GivenMean(x)=115standard deviation(σ)=9.8sample size(n)=37significance level(α)=1-0.95=0.05

Q: The amount of time, in minutes, that a person must wait for a bus is uniformly distributed between…

A: The provided information is  Let X=number of minutes a person must wait doe a  bus  a=14 b=25   The…

Q: You wish to test the following claim (HaHa) at a significance level of α=0.01α=0.01. For the context…

A: Given datapre-test             post-test48.2                         51.945…

Q: A Type I error means

A: The error in hypothesis testing arises when an incorrect conclusion is drawn at the population…

Q: p. Find the probability that a randomly selected bag of marijuana sold on the street will have a THC…

A: Given that.   X~N( μ , ?^2 )   μ=9.1     , ?=1   Z-score =( x - μ )/?

Q: The probability that a randomly selected student from a college is a senior is .20, and the joint…

A:

Q: Explain the Holt-Winter and Brown forecasting technique

A: Holt winter’s algorithm has wide areas of application. It is used in various business problems…

Q: An airline company is interested in improving customer satisfaction rate from the 55% currently…

A: Given data p=55% n=280 x=168

Q: Find the mean, variance, and standard deviation of the binomial distribution with the given values…

A: Given,n=122p=0.25A random variable X~Binomial(n=122 , p=0.25)

Q: A psychologist at a private mental health facility was asked to determine whether there was a clear…

A: The objective is to test whether there is a clear difference in the length of stay for patients with…

Q: The table shows how 10 students were ranked according to their achievements in both the laboratory…

A: Given data indicates the ranks of 10 students according to their achievements in both laboratory…

Q: Consider the following regression model: Y₁ =B₁ + B₂X₂ + B3X31+ B4X41 + U1 Using the model above…

A:

Q: res in PSPP and assigning your experimental group and control group!  1. What is the control group…

A: Given data for 10 participants, Before After Difference 2 4 2 2 4 2 4 6 2 1 0 -1 4 6 2…

Q: speaking anxiety. They completed a workshop and then were given a post test. At a =0.05, did the…

A: Given that  Sample size (n) = 8 Level of significance = 0.05 We use paired t test to solve this…

Q: A baseball player’s batting average is 0.320 (32%). This player batted 100 times. 1) Find the…

A: Use the Binomial distribution Q.1)

Q: Accu-Rating has just released its webcast report for last month. The report details the aggregate…

A: Histogram: Histogram is a graphical method of displaying the frequencies of a categorical variable.…

Q: Suppose that the distance of fly balls hit to the outfield (in baseball) is normally distributed…

A: Given that: Population mean, μ=259 Population standard deviation, σ=40

Q: The mean amount of time it takes a kidney stone to pass is 15 days and the standard deviation is 6…

A: Given that.   X~N( μ , ?^2 )   μ=15     , ?=6   Z-score =( x - μ )/?

Q: The amount of time spouses shop for anniversary cards can be modeled by an exponential distribution…

A: Given,A random variable X~Exponential(λ=147)f(x)=147e-x47     ;    x≥0

Q: n order to estimate the average electric usage per month, a sample of 121 houses was selected and…

A:

Q: A researcher studying the lifespan of a certain species of bacteria. A preliminary sample of 35…

A: Given : Margin of error =0.5 Standard deviation (s) =7 Confidence level =95%

Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 6.3…

A: GivenMean(μ)=6.3standard deviation(σ)=1.8sample size(n)=8

Q: A new laptop was about to be released in the market. It is out for some alpha testing.The…

A: Introduction: Denote μ as the true average battery life of the laptop.

Q: Use the normal distribution curve to illustrate your answer. 1. The following simple random sample…

A: GIVEN:- A sample that follows normal distribution such as 4, 6, 3, 5, 9, 3. To construct a…

Q: Latoya invested $3000 in a fund for 2 years and was paid simple interest. The total interest she…

A: Given:A=180P=3000t=2 yearsFind: r?

Q: 10.9. Mickey wanted to determine the lethal dose for rat poison. He then observed a random sample of…

A: Random sample         A random sample is a randomly selected subset of a population. In this…

Q: The mean number of customers arriving at a bank during a 15-minute period is 10. Find the…

A: Suppose random variable X defines the number of customers arriving at a bank during a 15-minute…

Q: 1. In a candy jar, there are 20 blueberry and 12 cherry gumballs. If you randomly select two…

A: Note: As per my policy i can answer only one question. kindly repost the remaining one 1) Given data…