Elephants are the mammals with the longest gestation period. One species of elephant has a mean gestation period of 635 days and a standard deviation of 63 days. If you were to decrease the number of samples taken to 35 (instead of 42), what would be the effect on the standard error of the sampling distribution? The standard error would (choose the correct answer) a. decrease Ob. cannot tell from given information. c. stay the same d. increase Assume that a random sample of 42 elephants was taken.

Q: Given a normally distributed population with a mean of 120 and standard deviation of 40, what is the…

A: given data,normal distribution ,μ=120σ=40n=16P(X¯ ≤105) =?

Q: Since it is a right tailed test, would it be  p= 0.1530  or p=0.2230.

A: From the original problem and solution, we get t = 0.3111 df = 12

Q: Calculate the margin of error and construct a confidence interval for the population proportion…

A: From the provided information, a) p̂ = 0.85, Sample size (n) = 180 and α = 0.2

Q: The table below shows the annual return of an investor over a 5 year period. 2017 2018 2019 2020…

A: Mean = ΣXi/n  Here sample size is n= 5 Mean = (15+18+20-2+3)/5 =54/5 =10.8%The mean of return is…

Q: Which of the following is(are) TRUE? I. A necessary assumption for the parametric test to be valid…

A: Given that  Which of the following is(are) TRUE? I. A necessary assumption for the parametric test…

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: I don't think I explained the research scenario effectively. I don't think it is a two-sample test,…

A: When the sample size is small (<30) then t-test is used and assuming that the samples are drawn…

Q: pills. Opponents of Halcion argue that, because this agent is so rapidly metabolized by the body,…

A:

Q: If we get a big difference between our sample mean and our population mean, will our test statistic…

A: Given information: The statement is given related to the big difference between x¯ and µ. Formula:…

Q: Based on a study by Dr. P. Sorita at Indiana University, assume that 12% of us have green eyes. In a…

A: The question is about normal approximation Given : Popl. prop. of people have green eyes ( p ) =…

Q: Find the mean of the data set 23, 20, 25, 27, 24, 23, 22, and 20. a. 25 b. 22 c. 23 d. 24

A: we have to find mean of data set.  data : 23,20,25,27,24,23,22,20 sample size (n)  = 8

Q: What is the mode of the following data set 4, 6, 5, 3, 5, 8, 7, 3, 7, 6, and 3? a. 6 b. 7 c. 5 d. 3

A: Followings are the Explanation of the question  let Consider the X = 4, 6, 5, 3, 5, 8, 7, 3, 7, 6, 3…

Q: fp(p) = 12 p²(1-p), 0<p<1. (a) Calculate E(X). (b) Obtain Var (X). (c) Find the marginal pmf of X.

A:

Q: A scientist is testing 120 samples of Copper dug out from a mine randomly to access purity. In the…

A: Givenp=0.65n=120Let "x" be the no.of pure copper have in the sample…

Q: An HR administrator wishes to know the proportion of employees that are currently using a very…

A: Follwings are the Explanation of the question' Given that 1) Margin of Error =E = 0.13 2) Confidence…

Q: To investigate whether one-pound bags of potato chips actually contain a full pound of chips, a…

A: Given that, To investigate whether one-pound bags of potato chips actually contain a full pound of…

Q: A medical school claims that more than 28% of its students plan to go into general practice. It is…

A: Given: Population proportion P = 0.28 Sample size n = 130 Sample proportion p^ = 0.39

Q: The error, X, in measuring the length of a rivet (in micrometers) has the following probability…

A:

Q: The dataset lowbwt.dat contains information collected for a sample of 100 low birth weight infants.…

A: The variables under the study are 'sbp' and 'apgar5'.

Q: A password must have 2 letters from the school acronym NDDU and 3 digits from 1 to 9. How many…

A: 2 letters from the school acronym NDDUand 3 digit from 1 to 9we have to find out the possible…

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

A: Given: P = 0.46 n = 120 X = 48 α = 0.10 Explanation: Test-statistic Z = p^-PP(1-P)n

Q: Question 2 A microbiologist exposes 10,000,000 Bacillus subtilis spores to a high level disinfectant…

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

Q: You are interested in testing if there is a difference in weight-loss between 3 popular diet types;…

A: Given α=0.1 Let A represent the "Low Calorie" diet type. Let B represent the "Low fat" diet type.…

Q: Do ESL students score lower in English college placement tests than the national average? A…

A: From the provided information, Population standard deviation (σ) = 15 Sample mean (x̄) = 147.9…

Q: How can we decide if a sample is typical or extreme? By comparing the population mean with the…

A: By the assumption of the central limit theorem, for sufficiently large sample size, the sampling…

Q: For numbers 1 to 4: The vitamin content of the flesh of each of a random sample of eight oranges and…

A: Given information: The sample is drawn. Find: Type of the given sample used. Which statements are…

Q: Consumers reports provided overall customer satisfaction scores for AT&T, Sprint, T-Mobile, and…

A: Given data: AT&amp;T Sprint T-Mobile Verizon 70 66 71 79 69 64 74 76 71 65 70 77 75 65…

Q: Find the density function of Y = e22, where Z~ N(μ, 0²- 2

A: Random variable z ~ N(μ, σ2)  Then to find pdf of y=e2z

Q: v. Select 8 white cars, 5 blue and 3 red cars. v. Name one advantage of the sampling method in ii)

A: We need to determine the sampling methods used in select 8 white cars, 5 blue and 3 red cars.

Q: Express the confidence interval 84.7% < p < 91.3 % in the form of p + E. % ± % Note: To do this,…

A: GivenConfidence interval is 84.7%&lt;p&lt;91.3%

Q: a. Is there a significant difference on the ratings of the respondents on Product Line-X11) when…

A: Given information: The tables obtained using SPSS output are given.

Q: Faked numbers in tax returns, invoices, or expense account claims often display patterns that aren't…

A: The probability distribution of a randomly chosen legitimate record X for short.

Q: A sampling distribution of the mean has a mean μ x σχ - 6 based on a random sample of n = 14. a.…

A: GivenMean(μx)=52standard error(σx)=6sample size(n)=14

Q: Select 8 white cars, 5 blue and 3 red cars. [1] v. Name one advantage of the sampling method in ii)

A: iv). The cars can be grouped by color 8 white cars , 5 blue cars and 3 red cars. The groups known as…

Q: Suggest a reasonable value of the biasing constant c based on the ridge trace, the VIF values and R²…

A: When the multiple regression model suffers from multicollinearity, the estimates of the regression…

Q: The variables used in the analysis below include: house price ($1000s) - price, lot size (square…

A:

Q: e equatorial radius of the planet Jupiter is measured 40 times independently by a process that is…

A: given data,n=40X¯=71492s=28CI=0.90α=1-0.90=0.10df=n-1=40-1=39

Q: A group fitness gym classifies its fitness class attendees by class type and member status. The…

A: The given summarized table is,

Q: function f (x, y) =15e-2x-3y a joint probability density function over the range 0<x and x <y.…

A:

Q: The SSRUR = 161.9, SSRR = 260.6, number of restrictions = 2, n = 89, and there are 8 right hand side…

A: Given Information: SSRUR=161.9 SSRR=260.6 number of restrictions q=2 There are 8 right hand side…

Q: Suppose data collected by observers at randomly selected intersections across the 250 drivers, 50…

A: given data,200- not using their cell phone 50- using their cell phonetotal 250 - drivers

Q: find the critical value, tc, C= 0.95 and n= 16.

A: givendata, tc=?CI=0.95n=16α=1-0.95=0.05df=n-1=16-1=15

Q: A researcher computed a 2 x 4 between subjects ANOVA. How many independent variables did the…

A: Given information: The information about ANOVA design is given.

Q: 1. One thousand two hundred and seventy deer are living on an island that is eight hundred and…

A:

Q: In a regression model involving 44 observations, the following estimated regression equation was…

A: We have given that Number of observation (n) = 44  ŷ  = 10 - 4x1 - 2x2 + 8x3 + 8x4 Number of…

Q: in a random sample of 60 students from a very large university, only 25% were able to identify…

A: Given Sample size n=60, sample proportion p^=0.25  Construct 95% CI for population proportion p

Q: Roediger and Karpicke (2006) investigated whether the test-enhanced learning effect (the…

A: Given that, Roediger and Karpicke (2006) investigated whether the test-enhanced learning effect (the…

Q: In how many ways can you arrange 3 different english books, 4 different mathematics books and 3…

A:

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: 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.