A telemarketing company knows that the daily average sales is 20. A new telemarketer who has just started with the company claims that the target of 20 sales per day is an unreasonably high target. From the 100 telemarketers working for you, you select a random sample of 16 and calculate the mean and the standard deviation of sales for a day to be 18.5 and 3.2 respectively. Is there any validity in the statement made by the new telemarketer? Test at the 5% level of significance.

Q: The crab spider. Thomisus spectabilis, sits on flowers and preys upon visiting honeybees. Do…

A: Given Information: Number of trials n=33 In x=23 trials of the total trials, the bees picked the…

Q: Suppose the age that children learn to walk is normally distributed with mean 13 months and standard…

A: GivenMean(μ)=13standard deviation(σ)=1.1sample size(n)=6

Q: production superintendent claims that there is no difference between the employee accident rates for…

A: Given:- No of days the accidents are recorded n=100 days. Number of accidents per day for evening…

Q: i) Draw a sketch of the area where f(x₁, x₂) is not zero. ii) Find P(X₂ < 1). iii) Find E(X₁X₂).

A: The joint PDF is given and first we have to determine the marginal pdf of X2 to find the required…

Q: A survey was conducted to evaluate the effectiveness of a new flu vaccine that had been administered…

A: The following information has been given: Observed Frequencies   No Vaccine One shot Two shots…

Q: (d) What is the correct conclusion of this hypothesis test at the 0.07 significance level? O There…

A: Given that  Mean difference (x - y) is 29.3 First three  subparts already solve.

Q: negative money. (Keep one decimal place.) a) What percent of years does this portfolio lose money,…

A:

Q: An important application of regression analysis in accounting is in the estimation of cost. By…

A: Given: n = 7 Formula Used: The equation of regression line is: Y = a + bX b = n∑XY-∑X∑Yn∑X2-∑X2 a =…

Q: Suppose that the amount of time per day that American adults spend on their mobile devices is…

A: Given Mean(μ)=229standard deviation(σ)=57

Q: A newsletter publisher believes that 29% of their readers own a laptop. Is there sufficient evidence…

A: Let p be the proportion for readers own a laptop  Given p=29%=0.29, level of significance ɑ=0.05

Q: (a) The p-value for p^=0.23p^=0.23 is closest to: 0.006 or 0.30 ? Choose the answer from the menu…

A: Introduction: It is required to identify the numerical value to which the p-value is the closest,…

Q: If n=12, ¯xx¯(x-bar)=49, and s=2, find the margin of error at a 90% confidence level Give your…

A: Given n=12 Sample standard deviation=s=2 Confidence interval=90%

Q: A manufacturing company uses an acceptance scheme on items from a production line before they are…

A: (a) No.of boxes=26 No.of defective=4 Quality boxes=22 Probability P(a)=22c4/26c4…

Q: (b) If you conduct a hypothesis test at the 0.09 significance level and calculate a P-value of 0.13,…

A: It is given that  The null and alternative hypotheses are  H0: μ = 59.9 H1: μ &gt; 59.9

Q: |x≤-a. Determine (a) the probability that X will be on the interval (—a/2, a/2), (b) the quantile…

A: As per bartlby guidelines we can answer only first three subpart and rest can be reposted

Q: In a normal distribution, the ___________ focuses on 50% of the cases instead of the highest and…

A: Out of all probability distributions, the normal distribution is very popular and widely used for…

Q: Involves two variables that are taken from a sample or population. univariate data bivariate data…

A: It is given that the statement about to the variables. Here, need to find out the correct choice for…

Q: f. The equation of the linear regression line is: y = ? + ?x (Please show your answers to two…

A:

Q: P(x > 29 | x < 51) =

A:

Q: correlation between the two variables. Use a significance level of Internet Users 66.5 76.6 80.1…

A: From the above data  The test statistic t=2.63 And  P value =0.058

Q: "Trydint" bubble-gum company claims that 3 out of 10 people prefer their gum to "Eklypse". Test…

A:

Q: b) Suppose that X is a random variable with the probability density function given by (2(1-x), 0≤ x…

A: Given as, fx=21-x0≤x≤10otherwise

Q: According to the U.S. Department of Agriculture, Alabama egg farmers produce millions of eggs every…

A: Obtain the mean egg production by Alabama farmers. The mean egg production by Alabama farmers is…

Q: The mean number of minutes for app engagement by table use is 8.2 minutes. Suppose the standard…

A: Given: μ = 8.2 minutes σ = 1 minute n = 70 Formula Used: Z-score = ∑X-(n)(μ)(n)(σ)

Q: A radio device consists of 1000 electronic elements. The probability of nonoperation for one element…

A: Given,n=1000p=0.001λ=npλ=1000×0.001=1A random variable X~Poisson(λ=1)P(X=x)=e-11xx!  ;    x≥0

Q: Bones Brothers & Associates prepare individual tax returns. Over prior years, Bones Brothers has…

A: It is given that the mean time to prepare a return is 90 minutes and standard deviation is 14…

Q: astion Suppose F stribution

A: Given that the notation can be fθ(x)=θ2xe-θx.

Q: When conducting a significance test for correlation, if your null and alternative hypothesis are:…

A:

Q: An experiment is conducted to determine the relationship between the amount of a certain drug in the…

A: Answers: c) The equation of the regression line between y and x is: (d)  When x=3.5 the predicted y…

Q: Use the empirical rule to estimate the number of farms whose land and building values per acre are…

A: here given , The mean value of land and buildings per acre from a sample of farms is ​$1600​,with a…

Q: . If the trendline contains all the points in the scatterplot and the line points to the right, we…

A: Hey there! Thank you for posting the question. Since there are multiple questions posted, we will…

Q: A study was done of 6 patients admitted to a hospital.   Their ages (x) and systolic blood pressure…

A: The question is about regression Given :

Q: The hazard-rate function, ny, given by: 0 ift

A:

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A: GivenMargin of error(E)=6%=0.06confidence level=99%

Q: Suppose that X is a random variable with the probability density function given by - f(x) = {²01…

A:

Q: Express the confidence interval (29.2%,37%) in the form of ˆp±MEp. ___% ± ___%

A: Solution

Q: The interval is a enter your response here​% confidence interval. ​(Round to one decimal place as​…

A: Given that  Sample size n =1100 Sample proportion p^=68%=0.68 Margin of error =E = ±4%=±0.04

Q: A sample of 900 computer chips reveal that 75% of the chips do not fail in the 1st 1000 hours of…

A: Given data  Sample size n=900 Sample proportion=0.75  Population proportion=0.72 Alpha=0.02 Null…

Q: A researcher constructs a confidence interval using the value z*=1.44. What confidence level does…

A: From the above data  We are given that the critical value  Z*=1.44

Q: a. state the null and alternative hypothesis b. find the rejection region and decision at a= .05

A: In the given scenario, 8 people were chosen randomly for a weight program. Their weights were…

Q: 6.22 The file Utility contains the electricity costs, in dollars, during July of a recent year for a…

A:

Q: The mean value of land and buildings per acre from a sample of farms is ​$1600​, with a standard…

A:

Q: A market research study hopes to determine the effectiveness of a celebrity endorser of their wine…

A: Given that  Level of significance =0.05  We have to conduct hypothesis testing for the claim that…

Q: Express the confidence interval 68.8%<p<84% in the form of p±ME. ___% ± ___%

A: The given confidence interval is 68.8%&lt;p&lt;84%

Q: 5 a. b. C. two examples of the following: Populations Quantitative data Qalitative data.

A: Hi there! Thanks for posting the question. Since there are multiple subparts, we will answer the…

Q: For the decision rule: Reject the null hypothesis if the computed statistic _______ positive…

A: It is given that the statement about to the decision rule of rejecting the null hypothesis. Here,…

Q: Estimate the average by first rounding to the nearest 100: 120, 230, 455, 175

A: We have to find average of given data 120, 230, 455, 175   n=4

Q: Which regions represent set ANC?

A: Here use basic of venn diagram  Here in venn diagram  there are 3 events A , B and C

Q: i) expected return for Lilac ordinary share ii) Standard deviation of return for lilac ordinary…

A:

Q: Government regulations dictate that for any production process involving a certain toxic chemical,…

A: Solution  Given That, Government regulations dictate that for any production process involving a…