A game software company advertises that their latest antivirus program takes 150 seconds to install. An independent researcher took a random sample of 8 computers and installed the program there. The sample installation times are as follows: 130 145 148 154 159 166 166 172 What is your conclusion on the company advertisement, at 0.02 level of significance?

Q: In each part, give the value of the standardized statistic (z-score) for the sample proportion.…

A: We have,  Z = p^ - pp(1-p)n

Q: Suppose a random sample size of 60 is taken from a population with p = 0.51. What is the mean of…

A:

Q: In a random consumer survey, randomly selected drivers of Porsche, Mercedes, and BMW were asked to…

A: Solution:- from given information Null hypothesis H0: There is no difference among Porsche,…

Q: [t (47) = -8.21, p = .03] Based on the parenthetical statement given above, what is the sample size…

A: The t-critical value at 47 degrees of freedom is -0.82.

Q: The researchers from a study interviewed two random samples, one in 2015 and one in 2018. Both…

A: Read a print book 2015 2018 total Yes 1195 1372 2567 No 726 605 1331 total 1921 1977

Q: A software company advertises that their latest antivirus program takes 150 seconds to install. An…

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Q: The manufacturer of a popular soft drink claims that cans of this drink contain 12 ounces.  A…

A: Given that  The data are…

Q: A restaurant manager is interested in investigating whether the main course ordered and the dessert…

A: a. The correct statistical test to use is Independence.

Q: A lawsuit claims that in a large company, the managers who are men make significantly more money…

A: Hi! Thank you for the question, As per the honor code, we are allowed to answer three sub-parts at a…

Q: A restaurant manager is interested in investigating whether the main course ordered and the dessert…

A: Solution-: Given: α=0.01 We have following table:     Food preference     Fish Meat Vegetarian…

Q: Derrick surveyed a random sample of 100 students from his middle school to learn more about what…

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Q: Ms. Chemistry gave a 10-item test in Statistics to eight students and obtained the following scores:…

A: Note: Hi there! Thank you for posting the question. As there are several independent questions,…

Q: d) If your random sample actually produced a mean of 723,500 php, would you consider this as…

A: Here use rule for finding unusual range  That is values those are above 2 standard deviation from…

Q: A random sample of the number of educational projects in each of the regions of the country are as…

A: The following information has been given : 47,95,54,33,64,4,8,57,9,80,8,90,3,49,4,44 The sample size…

Q: A researcher surveys 50 individuals in the North Ward of Thunder Bay, and 40 in the South Ward, and…

A:

Q: The results of a study that used an independent samples t-test was t(28) = 2.14, p = .01. Based on…

A: t(28) means that degree of freedom  = 28 Now, degree of freedom for a t-test one sample case  = n-1.

Q: A random sample of n1 = 148 people ages 16 to 19 were taken from the island of Oahu, Hawaii, and 14…

A: a) The level of significance, denoted by α, is defined as the probability of incorrectly rejecting…

Q: In testing the hypothese H0 : p = 0.4  Ha : p ≠ 0.4 The test statistic is found to be 1.87. What is…

A:

Q: From the adult male population of four large cities, random samples of izes given below were taken…

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Q: The manufacturer of a popular soft drink claims that cans of this drink contain 12 ounces.  A…

A: Degree of freedom explains the number of attribute which are independent in the sample. It is…

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Q: A travel agent claims that the average of the number of rooms in hotels in a large city is 500. At α…

A: It is given that the data for a random sample of seven hotels. The claim is that the average of the…

Q: If a researcher reported for a single-sample t-test that t(17) = 2.90, p<.02, how many subjects…

A: It is given that the test is single-sample t test and the degrees of freedom is 17.

Q: You are told that the proportion p of those who answered "yes" to a poll about internet use is 'p =…

A:

Q: t(23) = 3.20, p = .01.

A: Given, t(23)=3.20 p=0.01

Q: If a sample of 362 customers is taken from a population of 5530 customers, the sample variance, s,…

A: Solution -Given that  Sample size n=362 Population size N=5530

Q: The lifetime of a type of battery, in hours, from a sample provided by a manufacturer is as follows…

A: For the given sample, The sample variance is, s^2=8.4889 and the sample standard deviation is…

Q: The claim is that for a smartphone​ carrier's data speeds at​ airports, the mean is m=12.00 Mbps.…

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Q: The following summary measures are from a random sample. n = 60 x̅ = 81.1 ∑x² = 412142   The sample…

A: The formula for the variance is given by  s2=∑x2-∑x2nn-1              (1) since we know that x=∑xn…

Q: A​ state-by-state survey found that the proportions of adults who are smokers in state A and state B…

A: Denote p1, p2 as the true population proportions of adult smokers in states A and B, respectively.

Q: A​ state-by-state survey found that the proportions of adults who are smokers in state A and state B…

A: Consider p1 as the proportion of adults who are smokers in state A and p2 as the proportion of…

Q: 3. A researcher estimates that the average height of buildings in terms of the number of storey in…

A: In hypothesis testing, the value of the test statistic is calculated from the sample observations.…

Q: Suppose we are now interested in taking random samples of 800 US adults instead of 150 and…

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Q: Gasoline prices (per litre) for the last five weeks were P50.95, P51.25, P52.50 P49.30 and P51.70.…

A: We want to calculate the sample variance

Q: In a sample with M = 40 and s = 8, what is the z-score corresponding to X = 38? %3D

A: Solution: 7. From the given information, M=40 and s=8.

Q: Is there convincing evidence that the proportions of those who would fall into each of the hormone…

A: The expected values are,   None Esterified Estrogen Conjugated Equine Estrogen Total Venous…

Q: Perform the hypothesis test that there is a relationship between gender and major 4) at 5% level of…

A: Solution. To test the hypothesis we will use chi square test for independence.

Q: The manufacturer of a popular soft drink claims that cans of this drink contain 12 ounces.  A…

A: 1. Degrees of freedom: sample size=n=18 The number of degrees of freedom-n-1=18-1=17

Q: The Substance Abuse and Mental Health Services Administration (SAMHSA, 2017) estimates that…

A: Solution is given below

Q: A social psychologist records the number of outbursts in a smaple of different classrooms at a local…

A: From the information, the degrees of freedom is 39, p-values is less than 0.05, and Cohen's d is…

Q: In a mathematics class, the scores of 10 students in their Mathematics are the following: 4 14 10 8…

A: Given data: Using Linear interpolation: 1) Arrange tha data set in increasing order,. 2) find…

Q: Two samples of scores on a survey are as follows: Sample A: 107 6 8| 7 |9 Sample B: 18 310|112 7 27.…

A: We have given that,  The data of sample B is,  18, 3, 10, 1, 12, 7 Then,  We will find the variance…

Q: The researchers from a study interviewed two random samples, one in 2015 and one in 2018. Both…

A: The best estimate of p is obtained by pooling the data to get the proportion of successes in both…

Q: 1. Find the calculated P-value using the following link: http://www.statdistributions.com/t/ 2. Is…

A: x (x-xbar)^2 11.9 0.003735 11.9 0.003735 12 0.025957 11.9 0.003735 12 0.025957 11.7…

Q: A researcher surveys 50 individuals in the North Ward of Thunder Bay, and 40 in the South Ward, and…

A: Given, n1=50 n2=407 p^1=40%=0.40 p^2=30%=0.30 α=0.10 x1=n1*p1=50*0.40=20x2=n2*p2=40*0.30=12

Q: Please answer the following multiple choice question. View attached image to see the question

A: Identify the true of false for the given data. The correct option is identified below: From the…

Q: Find the mean for the given sample data. Unless other The students in Hugh Logan's math class took…

A: The formula of the mean is:

Q: The manufacturer of a popular soft drink claims that cans of this drink contain 12 ounces.  A…

A: Given that

Q: From the population of the 300 student scores above a random sample of size n = 8 is selected. The…

A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…