Basic Math question and answers for July 22, 2023
- Q The mean number of minutes for app engagement by a table user is7.5 minutes. Suppose the standard deviation is 1.25 minutes. Take asample of 80.a. What are the mean and...
- Q For the following 2 groups, do a power analysis to determine thestatistical power at the p=0.05 and p=0.01 levels. For the poweranalysis, seek power for a difference in means of...
- Q Robert Altoff is vice president of engineering for amanufacturer of household washing machines. As part of a newproduct development project, he wishes to determine the optimallength of time for the...
- Q Consider a sample with data values of 27, 25, 20, 15, 30, 34,28, and 25. Compute the 22nd, 27th, 59th, and 69th percentiles. Ifneeded, round your answers to two decimal...
- Q In August 2003, 56% of all employed adults in the United Statesreported that basic mathematical skills were critical or veryimportant to their job. A researcher believes that this proportionhas increased,...
- Q The percent of fat calories that a person in America consumeseach day is normally distributed with a mean of about 36 and astandard deviation of about ten. Suppose that 16...
- Q Roads A, B, and C are the only way to escape from a certainprovincial prison. Prison records show that, of the prisoners whotried to escape, 9 % used road A,...
- Q Suppose that for a dataset the mean is known. Using the 25random samples, we computed the sample variance as s^2=0.001.a) Does the data support the claim that the true standard...
- Q xP(x)00.1510.120.330.45Find the mean of this probability distribution. Round your answerto one decimal place.2xP(x)00.0510.1520.2530.55Find the standard deviation of this probability distribution. Giveyour answer to at least 2 decimal places32.36 Is it...
- Q Here are summary statistics for randomly selected weights ofnewborn girls: n = 192, X=26.5 hg, S= 7.1 Construct a confidenceinterval estimate of the mean. Use a 99% confidence level. Arethese...
- Q Triangulation is the process of examining data and otherfactors from different perspectives to establish a study’svalidity.What is your interpretation of validity in qualitative research?How should researchers use triangulation to establish...
- Q Assume n independent observations, denoted Xi,(i=1,....n), are taken from a distribution with a mean of E(X)=?and variance V(X) =?2. Prove that the mean of the n observationshas an expected value...
- Q The data show the population (in thousands) for a recent year ofa sample of cities in South Carolina.292615 13 1758142537 19 4067231097 12129272018120 35662111 43 22Source: U.S. Census Bureau.Find the data value that corresponds to each percentile.a. 40th...
- Q You wish to test the following claim (Ha) at a significancelevel of ?=0.02 Ho:p1=p2 Ha:p1>p2You obtain 118 successes in a sample of size n1=249 from the firstpopulation. You obtain 76 successes in...
- Q To test H0: mu=60 versus H1: mu<60, a random sample size n=25is obtained from a population that is known to be normallydistributed. Complete parts a through d below. a) if...
- Q A researcher wishes to estimate the proportion of adults whohave high speed internet access. What size sample should beobtained if she wishes the estimate to be within .03 with 99%confidence...
- Q Identify at least three different qualitativedata collection instruments (e.g. in-depth interviews, focusgroups, etc.) and how they can be used in astudy.
- Q A) If four babies are born in a given hospital on thesame day, what is the probability that all four will be boys?B) if four babies are born in a...
- Q The Office of the Superintendent of Bankruptcy of Canada (OSBC)is developing a new index to measure the vulnerability of firms inthe new technology industry. The index is a ratio of...
- Q A researcher wants to assess association between high bloodpressure prevalence and the amounts of processed foods. If thelevel of education is associated with both amounts of processedfood and high blood...
- Q ath & Music (Raw Data, SoftwareRequired):There is a lot of interest in the relationship between studyingmusic and studying math. We will look at some sample data thatinvestigates this relationship. Below...
- Q A small pilot study is conducted to investigate the effect of anutritional supplement on total body weight. Six participants agreeto take the nutritional supplement. To assess its effect on bodyweight,...
- Q An analysis is conducted to compare mean time to pain relief(measured in minutes) under four competing treatment regimens.Summary statistics on the four treatments are shown below. TheANOVA table presented below...
- Q 8. The following data are for a series of external standards ofCd2+ buffered to a pH of 4.6.14[Cd2+] (nM) 15.4 30.4 44.9 59.0 72.7 86.0Sspike (nA) 4.8 11.4 18.2...
- Q Data Structures for R studioCreate a numeric vector containing 10 random numbers rangingfrom 1 to 10000.Validate that the object you created is a vectorGive an example of where you might...
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