Twelve different video games showing drug usedrug use were observed. The duration times of drug usedrug use were​ recorded, with the times​ (seconds) listed below. Assume that these sample data are used with a 0.100.10 significance level in a test of the claim that the population mean is greater than 7575 sec. If we want to construct a confidence interval to be used for testing that​ claim, what confidence level should be used for a confidence​ interval? If the confidence interval is found to be 22.322.3 secless than

Q: A random sample of 40 students taken from a university showed that their mean GPA is 2.94 and the…

A: Obtain the 99% confidence interval for the population mean GPA of students: Denote the population…

Q: A paint manufacturer wished to compare the drying times of two different types of paint. The drying…

A: we have  given that  sample random sample n1=11 , n2=9   xbar1=75.7 ,xbar2=64.3 and s1=4.5 ,s2=5.1

Q: Twelve different video games showing substance use were observed and the duration of times of game…

A: Obtain the 90% confidence interval estimate of the population standard deviation of the duration…

Q: Twelve different video games showing substance use were observed and the duration of times of game…

A: Find the sample standard deviation. I will use an excel calculator to find the sample standard…

Q: When 33 campers are randomly selected and surveyed, it was found that the average number that prefer…

A: Given Information: Number of campers randomly selected, n =33 Avarege numple of peope prefer to camp…

Q: in an effort to cut costs and improve profits, many US companies have been turning to outsourcing.…

A:

Q: In a sample of 16 fish from my pond it was found that 5 are under 165 grams in weight. Based on this…

A: Given information n = 16 fish No of fish under 165g (x) = 5

Q: In order to increase employment, France mandated that all companies with 20 or more employees reduce…

A: a) 90% Confidence interval for the Population Proportion We need to construct the 90% confidence…

Q: It is required to construct a (1−?)100% confidence interval for the true population median, M using…

A: A sign test is non-parametric. In case of a sign test, we compare the medians, M, instead of the…

Q: In our Condor Cafe, the Oxnard College Culinary Program offers the most delicious and affortable…

A:

Q: In a recent New York City marathon, 25,221 men finished and 253 dropped out. Also, 12,883 women…

A: State the hypotheses.   Let p1 denotes the proportion of men finished Marathon. Let p2 denotes the…

Q: From a random sample of 64 high school seniors, the sample mean and standard deviation of the math…

A: Given data; Sample Size =64 Mean =90 Standard deviation =7 To find : 92 % confidence interval…

Q: A randomly selected sample of 31 Hollywood movies from 2015 was used to construct a 95% confidence…

A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts.  In case…

Q: According to data gathered by Prof. Leen, the average U.S. worker takes 16.8 days of vacation each…

A:

Q: A survey conducted in year 2021 suggested that 210 out of 300 (70 percent) of university students…

A: The confidence level is 90%, population proportion is 70%, and margin of error is 5%.

Q: In a sample of 86 recommendations, it is found that 60% of them made money. Determine the upper…

A: Given Data: The number of recommendations is: n=86 The confidence interval is: CI=95% The proportion…

Q: ccording to a past poll conducted of Lexington residents, 52% indicated support for a light rail…

A: Given: Sample proportion p^=52%=0.52 Sample size (n) = 400

Q: nt of time a random sample of 47Americans 16 and older spent watching television each day is 3.1…

A: As the population standard deviation is known, we will use z distribution. The 90% confidence for…

Q: Many companies allow managers to accumulate extra working hours above 40 hrs/week (called comp…

A:

Q: A sample of 82 Oscar-winning actresses had a mean age of 35.9 years when they won the award. s =…

A: Given information- Population mean, μ = 33 years Sample size, n = 82 Sample mean, x-bar = 35.9 years…

Q: A college admissions officer states that the average ACT score for incoming freshmen at her school…

A: GivenThe standard deviation of ACT scores σ=4 pointsSample size n=36Sample average ACT score…

Q: South African mathematician John Kerrich was known for his coin tossing experiment. While a prisoner…

A:

Q: A simple random sample of size n equals 450 individuals who are currently employed are asked if they…

A: Given that, The sample proportion is, Critical values: By using the standard normal table of Z,…

Q: Is there a difference in the average age that people get married in the US and its close neighbor,…

A: a) Given, Suppose a random sample of 30 Americans had an average age of marriage of 28 years with…

Q: Twelve different video games showing drug use were observed. The duration times of drug use were…

A: Here, the significance level is 0.10. The claim of the test is the population mean is greater than…

Q: In a random sample of​ males, it was found that 22 write with their left hands and 212 do not. In…

A: As per guideline expert have to answer first three subparts only dear student please upload other…

Q: In a survey, 32 people were asked how much they spent on their child's last birthday gift. The…

A: Given:  Sample size n=32  Sample mean xbar=$49  Standard deviations (σ)=$7  To find 98% confidence…

Q: MCC was interested in the percentage of their students who are employed within one year of…

A: From the provided information, Sample size (n) = 200 Among which 162 were employed within one year…

Q: The personnel manager of a large corporation wishes to study absenteeism among clerical workers at…

A:

Q: A study done by researchers at a university concluded that 90% of all student athletes in a country…

A: The question is based confidence interval for a popl. proportion Given : Prop. of all student…

Q: A stock investor would like to have an idea concerning the average return of stocks that are traded…

A:

Q: A bank manager would like to waiting time needed by those customers who have visited to his branch.…

A: GivenMean(x)=8.43standard deviation(s)=0.5473sample size(n)=25confidence interval = 99%

Q: The drug Clarinex is used to treat symptoms from allergies. In a clinical trial of this drug, 2.1%…

A: Given: p^1=0.021p^2=0.012n1=1655n2=1652 From the Standard Normal Table, the value of z* for 95%…

Q: Results from the National Health and Nutrition Examination Survey (NHANES) conducted thirty years…

A:

Q: Asample of 14 ramdomly selected commuters in Chicago showed the average of the commuting times was…

A: Given, n = 14 mean = 33.2 Standard deviation = 8.3 Since, the confidence level is not given so let's…

Q: the mean and standard deviation of the quality grade points of random sample of 36 students from a…

A:

Q: The treasurer of a municipality claims that the average net worth of families living in this…

A: Given data: Mean = 730,000 Sample size = 50 Sample mean = 860000 Standard deviation = 65000…

Q: In order to determine the true mean pulse rate of New York citizens you take a sample of 16 and the…

A: Confidence Interval: In statistics, we can say a range of values of the specified population…

Q: computer company claims that the lifespan of its batteries is less than 5.4 years. The population…

A:

Q: A simple random sample of people involved in car crashes was collected. Among 2678 people not…

A: Given information- We have given two samples with no. of people involved in car crashes and their…

Q: A company director investigated whether there is a difference in the mean number of overtime hours…

A: Given Information: Each manager A and B manages 100 employees. Random samples of n = 35 employees…

Q: Fifty-five students were randomly selected from Airbender College, and their average score on a…

A: Given, x=68.22s=18.8n=55α=0.01zα2=z0.005=2.576

Q: Fifty oranges of one variety were selected and random and weighed. A 95% confidence interval…

A: It is given that 95% confidence interval for mean = (7.58, 8.72) ounces

Q: A car parts company wishes to find the defect rate of a certain part. To that end, they select a…

A: Given data,n=512x=16p=xn=16512=0.03125z-value at 95%confidence is Zc=1.96

Q: The sales price of a special brand of cereal is believed to be normally distributed. Data were…

A: Since the sample size is small and population standard deviation is unknown, t distribution can be…

Q: A random sample of 100 items taken from a large batch of articles contain 5 defective items. (a) Set…

A:

Q: What is the critical value t* from Table D should be used to calculate the margin of error for…

A:

Q: A company has analysed data for a sample of employees who have undertaken training designed to…

A: We have given the following statement about the confidence interval.

Q: An October 2011 CBS News Poll on illegal immigrants interviewed 1012 randomly selected American…

A: Givensample size(n)=1012x=688p^=xn=6881012=0.6798

Q: A company director investigated whether there is a difference in the mean number of overtime hours…

A: No, because the data were not collected using a random method. B

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.