What is the probability of a group of 4 having a score of atleast 60 if the mean is 50 and SD is 8?

Q: Find the 25th percentile weight for a pumpkin where the mean weight is 12 lbs with a standard…

A: given data,Pumpkinweight  follows normal distribution,μ=12σ=2.4we have to find out the 25th…

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

A: given data  n = 124 p = 0.89 binomial distribution  find mean sd and variance.

Q: Construct a probability distribution for the data and draw a graph for the distribution. The…

A: Followings are the Explanation of the question

Q: Assume that blood pressure readings are normally distributed with a mean of  125  and a standard…

A: Given,sample size(n)=37Mean(μ)=125Standard deviation(σ)=4.7

Q: The average charitable contribution itemized per income tax return in a certain state is $792.…

A: Given Mean=792 Standard deviation=103

Q: Almost all medical schools in the United States require appli- cants to take the Medical College…

A: Given datafor applicants the mean=8.9  and standard deviation=2.3for those who actually entered…

Q: You expect to retire in 25 years. Ater you retire, you want to be able to withdraw $4,500 from your…

A: Given that, Rate of interest r =4%  Time (t) = 25 years  After we entire we need to get $4500 for 30…

Q: The accompanying data represent the carbon dioxide (CO₂) emissions (in thousands of metric tons) of…

A: Mean is the sum of observations divided by the total number of observations.

Q: Calculate the standard error from the following descriptive statistics a . s1=24 , s2=21 , n1=36 ,…

A: Given a. s1=24 , s2=21      n1=36 , n2=49 b . s1=15.40 ,s2=14.80;        n1=20; n2=23 c. s1=12 ,…

Q: C. No, because the sam is a simple random mple, the sample is less than tion, and there are at least…

A: It is given that the 95% confidence interval is  (0.362, 0.768) or ( 36.2%, 76.8% )

Q: (d) Find the p-value. (Round to three or more decimal places.) (e) At the 0.05 level of…

A: From the original problem and the solution, we have t = 1.575 df = 19 α = 0.05 The test is…

Q: The average teacher's salary in North Dakota is  $35,441 . Assume a normal distribution with…

A: It is given that  Mean, μ = 35441 Standard deviation, σ = 5100 Z-Score, Z = ( X - μ )/σ

Q: The correlation between X and Y is -.27, and the regression equation is Ŷ = - 0.49X + 9.27 before…

A: Standardization doesnt effect the correlation.So the correlation will be same after the…

Q: 1. A planner wishes to estimate average household size for a community to within an accuracy of…

A: Given information: Accuracy (E)=±0.2Level of significance (α)=0.05Standard deviation (σ)=2.0 Find:…

Q: In order to set rates, an insurance company is trying to estimate the number of sick days that full…

A: Solution-: Given: σ=3.3,M.E.=E=1,c=0.99 We want to find sample size n=?

Q: Engagement, the average student spends about 17 hours each week preparing for classes; preparation…

A: Given Mean=17 Standard deviation=4 n=16

Q: rofessor wants to know if her Psychology statistics class has a good grasp of th. Six students are…

A: Given that  Sample size n=6 Population mean =70

Q: The following data represent the pulse rates (beats per minute) of nine students enrolled in a…

A: Here, the population size, N = 9.

Q: Claim: A minority of adults would erase all of their personal information online if they could. A…

A: (a)   Determine the claim in the symbolic form.   The claim in the symbolic form is expressed below…

Q: An article in a 2006 issue of Journal of Behavioral Decision Making reported on a study involving 47…

A: Solution: From the given information, there are 47 undergraduate students involved in a class at…

Q: K Scores of an IQ test have a bell-shaped distribution with a mean of 100 and a standard deviation…

A: Given: μ = 100 σ = 18

Q: A probability experiment consists of rolling a fair 6-sided die, numbered 1 to 6. Find the…

A: Given,A six sided die is rolled once than the possible outcomes ares={1,2,3,4,5,6}

Q: Determine the margin of error in estimating the population mean,  μ . A sample of  90  college…

A: given data  n = 90σ = 888x¯ = 322992% ci, E = ?

Q: 9. Find the following confidence interval critical values. Use the exact value off the table for…

A: As per our guidelines we can solve first three sub part of question and rest can be reposted.…

Q: Suppose taxi fare from Logan Airport to downtown Boston is known to be normally distributed with a…

A: Given X = $22.10, $23.25, $21.35, $24.50, $21.90, $20.75, and $22.65 n=7 Standard deviations=2.50

Q: Suppose that in a random selection of 100 colored​ candies, 25% of them are blue. The candy company…

A: Given n=100  0.10 significance level

Q: 2:18 Age Number (millions) The following data represent the number of people aged 25 to 64 years…

A: Obtain the value of the mean for age. The value of the mean for age is obtained below: From the…

Q: Find the critical value,  tc , for  =c0.90  and  =n10

A: Given,sample size(n)=10and c=0.90

Q: Tributary Içá Jutaí Japurá Coari Purus Manacapuru Negro Madeira Trombetas Tapajós Xingu Tocantins…

A:

Q: In Marissa's calculus course, attendance counts for 5% of the grade, quizzes count for 10% of the…

A: Formula Used: Weighted average = ∑WiXi∑Wi

Q: bias? a.accuracy b.population c. Precision d. Sample

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

Q: A student was asked to explain what it means to say we have 95% confidence in an interval computed…

A:

Q: What is the sampling method that you think was used for this research?

A: In this situation, the random sample of students submitted their essay for scoring to 3 different…

Q: Several months ago while shopping, I was interviewed to see whether or not I'd be interested in…

A: (a) Hypotheses: H0:p1=p2H1:p1<p2

Q: Job Bids A landscape contractor bids on jobs where he can make  $2750  profit. The probabilities of…

A:

Q: Use The Standard Normal Distribution Table to find the specified area under the standard normal…

A: given data  standard normal distribution  Z~N(0,1)   area to the right of z = 1.4 = ?

Q: In a gaming conference attended by 80 people, 35 plays Valorant, 20 plays DOTA. 15 plays Genshin…

A: we have to draw venn diagram and find number of people who plays atleast one ganmes

Q: 2:15 -0. (Round to the nearest integer as needed.) mylab.pearson.com/S + ← The accompanying…

A: Obtain the value of the sample mean footage   The mean is obtained below:   From the information,…

Q: Tdf=53T∼Tdf=53, use technology to find the probability P(T>2.16)P(T>2.16): P(T>2.16)=P(T>2.16)=

A: given data for t-distribution df=52test statistics t=2.16here we have to find out the p-value for…

Q: Find the Critical Values of the t- Distribution needed for a 95% confidence interval for the mean,…

A: Given data confidence interval=95% d .f=6

Q: d) Find the p-value. (Round to three or more decimal places.) 0 (e) Can we conclude that the…

A: It is given that the test is left-tailed test in original problem. From the solution, we get z =…

Q: Find the margin of error at a 80% confidence level for estimating the population mean if n = 31, 2 =…

A: According to given question, We have :- Sample size n= 31Sample standard deviation s  =  5Sample…

Q: An insurance company crashed four cars of the same model at 5 miles per hour. The costs of repair…

A: Given data is,$405 , $425 , $476 , $210

Q: May I know the answer of subpart d and e of Q7?

A: Solution: From the given information,

Q: Develop three examples of bad or invalid questions.  Rewrite your examples so they could be judged…

A: A bad question or invalid question is that assumes something as a fact when something is actually…

Q: The weight of a random scone sold by your favorite bakery has a mean of 105g and a standard…

A: given data  μ= 105σ = 5 n=45

Q: Vitamin D, whether ingested as a dietary supplement or produced naturally when sunlight falls upon…

A: Given that, n= 2700 and p = 23% = 0.23

Q: Scores on a standardized exam are normally distributed with mean of 517 and a standard deviation of…

A: It is given that  Mean, μ = 517 Standard deviation, σ = 60

Q: You wish to test the following hypotheses:       H0:π=0.45       Ha:π>0.45 You obtain a sample of…

A: Please like.....?

Q: Nine experts rated two brands of coffee in a​ taste-testing experiment. A rating on a​ 7-point scale…

A: Given information: Expert initials Brand A rating  Brand B rating C.C. 25 27 S.E. 27 27…