If a sample of 50 individuals was taken from a population with a standard deviation of 12 and the sample mean is 95, what is the t-statistic for a two-tailed hypothesis test at a significance level of 0.05?

Q: A national survey reports that the average number of screens (TVs, computers, tablets, and…

A: Solution We have given The null and alternative hypothesis H0: μ=10.7    H1:μ≠10.7

Q: A random sample of 64 business students required an average of 100 minutes to complete a statistics…

A: Given that, Mean = 100 Standard deviation = 20 Sample size = 64 95% confidence level

Q: mean score for the most recent applicants is lower than 70. He randomly samples the scores of 10…

A:

Q: Develop the ability to identify the null and alternative hypotheses when given some claim about a…

A: The question is about is identification of null and alt. hypo. Introduction : Null hypo : The hypo.…

Q: The accounts of a corporation show that, on average, accounts payable are $125.32. An auditor…

A: From the provided information, the followings are obtained: The claimed population mean amount (in…

Q: A statistics professor takes a random sample of 25 students who have taken a special statistics…

A: From the provided information, Sample size (n) = 25 Sample average (x̄) = 86 Sample standard…

Q: 3) A facilities manager at a university reads in a research report that the mean amount of time…

A: It is given that:

Q: pg. You suspect that the mpg is more for your car. The 43 trips on the highway that you took…

A: given   mean  of population   μ =32    ,  σ =5.5 sample size  n = 43  trips     sample mean  = x¯ =…

Q: Suppose that you are conducting a test to see if the mean time that an 8-12 year old child spends…

A: Given Data:x¯=3.7 Standard error=0.17529196 Degree of freedom=54 Test-statistic=2.852384 Critical…

Q: what sample size should be used to obtain a 99% confidence interval for the mean with +/-15 if the…

A: The margin of error is 15, the standard deviation is 48 and the confidence level is 99%.

Q: An article in the San Jose Mercury News stated that students in the California state university…

A: We have given the following information.  Hypothesized population mean = 4.5 Sample mean =5.1 Sample…

Q: According to a survey, the average age at which American men get married is 30. To test if men in…

A: Given information- Sample size, n = 16 Sample mean, x-bar = 28.3 Sample standard deviation, s = 1.3…

Q: The mean factory overhead per employees in goods-producing industries is currently $4.57. Suppose a…

A: We have given that  Sample size n =25 Population mean=4.57 Sample mean =3.89 Sample standard…

Q: A chicken farmer claims that his chickens have a mean weight of 58 ounces. The farmer takes a random…

A: In this problem, we will use z-test to solve the test statistic since the population standard…

Q: A powder diet is tested on 49 people and a liquid diet is tested on 36 different people. The…

A:

Q: Last year, the average amount that teams for the Statistics Games raised was $375. Have teams been…

A:

Q: According to a technician's study, male coworkers had 11.4 hours per month of overtime last year, on…

A: Given that, μ = 11.4x = 10.7s= 1.5 n = 15 H0: μ = 11.4   Vs   Ha: μ ≠ 11.4 which is two tailed test.…

Q: (a) The sample standard deviation was not reported, but suppose that it was 4 hours. Carry out a…

A: It is given that  Population mean = 12.6 Sample mean = 12.8 Sample Standard deviation = 4 Sample…

Q: A researcher wants to test to see if a population mean is different from 6. Based on a sample of…

A:

Q: e sample observations was 12.6 hours. ample standard deviation was not reported, but suppose that it…

A: We have given that  Sample size n = 1000 Sample mean = 12.6

Q: For a random sample of 48  professional soccer games, the variance of total points was 7.3 points.…

A: Sample size, Sample variance,  points. Confidence level,

Q: The average salary of North Carolina is reported to be $50,781. After completing a survey of 120…

A: Given,   Sample size = 120 Sample mean = 51203 Sample standard deviation = 2409   Set up the null…

Q: Starting engineers in the Philippines earned an average annual salary of P282,000. For the same…

A: GivenMean(x)=408000standard deviation(s)=274342sample size(n)=24α=0.1

Q: You are doing a right-tailed hypothesis test for the mean and have to approximate the standard…

A: It is given that the test is right-tailed. Level of significance is 0.01 Degrees of freedom is 39-1=…

Q: A random sample of 64 business students required an average of 50.7 minutes to complete a statistics…

A: Margin of Error E = z(alpha/2) * s / sqrt(n)Lower Bound = X - z(alpha/2) * s / sqrt(n)Upper Bound =…

Q: A national survey reports that the average number of screens (TVs, computers, tablets, and…

A: Given , Population mean = μ = 10.7 Population standard deviation = σ = 1.5 Sample size n = 35 Sample…

Q: A medical researcher administers a new medication to a random sample of 70 flu sufferers, and she…

A: From the provided information, The degree of freedom = n1 + n2 – 2 = 70 + 50 – 2 = 118 As, the…

Q: If the obtained sample mean has a z score of 1.69 and if a = .05, should you reject or fail to…

A: The given z-score is 1.69 and the alpha is 0.05.

Q: Given a sample mean of 83, a sample standard deviation of 12.5, and a sample size of 22, test the…

A:

Q: When 45 people used a certain diet for one year, their weight losses had a standard deviation of 4.8…

A: From the provided information, Sample size (n) = 45 Sample standard deviation (s) = 4.8

Q: The article referenced says that when women aged 25-34 binge drink they have on average 6.7 drinks.…

A:

Q: A researcher wants to test the hypothesis that the mean weight of packages delivered by a certain…

A: given data claim : μ = 10n = 30x¯ = 9.8s = 1.5α = 0.05

Q: A sample of 9 production managers with over 15 years of experience has an average salary of $71,000…

A: The objective of this question is to determine the sample size needed to estimate the true mean…

Q: 80 smokers were questioned about the number of hours they sleep each day. We want to test the…

A: From the given information we conduct Z test for mean.

Q: A sample of 100 observations has a sample mean of 500 and a sample standard deviation of 50. Conduct…

A: Introduction: Hypothesis testing is a statistical method used to make decisions about a population…

Q: We take a simple random sample of 16 adults and ask them how long they sleep on atypical night. The…

A: The objective of this question is to calculate the 88% confidence interval for the true mean time…

Q: In a one-sample z-test for the population mean, what is the null hypothesis when the sample mean is…

A: The null hypothesis in this case would be that the true population mean is equal to a specified…

Q: In 2011, the "average" Tasmanian 12-year-old spent 144 mins on the internet per day using a mobile…

A:

Q: If a sample of 40 individuals was taken from a population with a mean of 110 and a standard…

A: Introduction In this problem, we are conducting a one-tailed hypothesis test to determine if the…

Q: A statistician is conducting a hypothesis test to determine if the average lifespan of a certain…

A: To calculate the p-value, the statistician will use a Z-test. The Z-score is calculated as follows:…

Q: A facilities manager at a university reads in a research report that the mean amount of time spent…

A: Since, we only answer up to 3 sub-parts, we'll answer the first 3. Please resumbit the question and…

Q: A researcher claims that the amounts of acetaminophen in a certain brand of cold tablets have a mean…

A: Given: n = 29 x¯ = 597.9 s = 3.8 α = 0.01

Q: In a study of computer use, 1000 randomly selected Canadian Internet users were asked how much time…

A: The sample size is 1000, sample mean is 12.7.

Q: A sample of 100 observations from a normal population has a mean of 50 and a standard deviation of…

A: The given information is:The sample number of observations from a Normal population are The sample…