A professor observed the number of times mobile phones interrupted the signal of her microphone during her lecture. She did this for 10 randomly selected lectures before and after issuing a warning to confiscate mobile phones during class. Software Output: Shapiro-Wilk Test data: paired_differences_counts               p-value = <0.0001   What is the most appropriate test procedure to test if the warning is effective (average number of interruptions due to mobile phones decreased)?    a. Z-test b. Paired t-test c. Paired Wilcoxon-Signed Rank Test

Q: Last year a company received 50 complaints concerning carpet installation. The data in the…

A: Given that  Population mean μ =40

Q: The mean body mass index (BMI) for boys age 12 is 23.6 kg/m2. An investigator wants to test if the…

A: Given  detect a difference in BMI of 2 kg/m2 standard deviation in BMI is 5.7 kg/m2.   Asume that…

Q: A lunch bar has an average sales amount of $8.51. The manager initiates staff training to try to get…

A: Calculate for the observed value of money test statistic Let:t = test statistic Formula:t =…

Q: A researcher is trying to determine which treatment method—sleeping longer hours, using a…

A: Here, A treatment is sleeping longer hours, using a moisturizing cream, or drinking increased…

Q: A factory that manufactures bolts is performing a quality control experiment. Each object should…

A: Provided information is ; sample size(n) =69 bolts sample mean(x¯) = 18.04 Population standard…

Q: Historically, the mean systolic blood pressure (SBP) has been a rather high 139 units for adults in…

A:

Q: (i) Determine the 90% confidence interval for the true mean time from the model. (ii) Suppose the…

A:

Q: Select appropriate variables of your choice (not an example from lab handout or PP slides) to…

A: The descriptive information has given in table (1). In which the mean of variables 'English only',…

Q: Do men take more time than women to get out of bed in the morning? The 47 men observed averaged 5.4…

A: 1. In this case, two independent groups of individuals- men and women are being compared, based on…

Q: Conduct the test at the 0.01level of significance.

A: Given that  Population Proportion (p)=0.328 random sample of 27 infants with an oral cleft, 15 had…

Q: TABLE 7.6 Pilot data on left ventricular mass (LVM) in children from the Bogalusa Heart Study 4-year…

A: Given information: The data is given below. Change(g) 24 -8 56 -2 33 18 65 9…

Q: A manufacturer of chocolate candies uses machines to package candies as they move along a filling…

A: We have given that  Sample size n=50 ,mu=8.17 , xbar=8.168 ,s=0.052 level of significance = alpha…

Q: The extract of a plant native to Taiwan has been tested as a possible treatment for Leukemia. One of…

A: Given that the collagen amount was found to be normally distributed with a mean is 73 and the…

Q: The average wait time to get seated at a popular restaurant in the city on a Friday night is 10…

A: It is given that the p-value is 0.9396.

Q: A researcher is trying to determine which treatment method-sleeping longer hours, using a…

A: Given : Hypothesis Testing : The procedure of providing the conclusion about the population…

Q: The distribution of passenger vehicle speeds traveling on the Interstate 5 Freeway (1-5) in…

A: According to the given information in this question We need to answer D

Q: Netflix: A study conducted by a technology company showed that the mean time spent per day browsing…

A: Sample size (n)=109Sample mean =21.6Population mean =20.6Standard deviation =7Test hypothesis: Claim…

Q: Abbot Milk Company conduct a study about child growth and the relationship with milk consumption…

A: The claim is μ≠91.4 So, the null and alternative hypotheses are H0:μ=91.4H1:μ≠91.4 Given that…

Q: Review(10.6): Conplete the ANOVA table.…

A: The objective is to derive the appropriate values of SSWithin (i.e., Sum of Square Within),…

Q: The white wood material used for the roof of an ancient temple is imported from a certain country.…

A: The random variable breaking strength of the white wood is normally distributed. The sample size is…

Q: Tony V. owns a house painting business in Seattle. He estimates that it takes his crew three-…

A: Given that, Sample size n=25 Sample mean x¯=3.185 Sample standard deviation s=0.6514

Q: During an economic​ crisis, the average value of homes in a community of 36 homes lost ​$9589 with…

A: Consider that μ defines the population mean amount homes.

Q: Data is collected to compare two different types of batteries. We measure the time to failure of 10…

A: Data is collected to compare two different types of batteries. We measure the time to failure of 10…

Q: A NOmal population has a mean of M-7. AFter receiving treatment. a sample ofn=4 score ueilds the…

A:

Q: The standard score for a two-tailed test is 2.0. What is the P-value? (Don't Hand writing in…

A: Given:The standard score for a two-tailed test is 2.0.

Q: The average American consumes 94 liters of alcohol per year. Does the average college student…

A: From the provided information, The sample size (n) = 11 The test statistic = -3.490.

Q: Conservationists working in the Antarctic keep a close eye on the physical characteristics of King…

A: Given information- Population mean, μ = 15.4 kg Sample size, n = 35 Take significance level, α =…

Q: Acid rain, caused by the reaction of certain air pollutants with rainwater, is a growing problem in…

A: sample size(n)=50 Mean(x)=3.6 standard deviation(s)=0.5 significance level(α)=0.05

Q: A researcher is trying to determine if there is a significant relationship between age and annual…

A: One way chi square use the expected and observed frequencies to test the null hypothesis .…

Q: A pipes manufacturer makes pipes with a length that is supposed to be 11 inches. A quality control…

A: The question is about hypo. testing Given : Popl. mean length of pipe ( μ ) = 11 inches Randomly…

Q: A random sample of 75 medical doctors in Detroit showed that they worked an average of 55.1…

A: Conditions for Two sample Independent t test: The two samples are independent to each…

Q: Assume that adults have IQ scores that are normally distributed with a mean of 100.3 and a standard…

A: Assume that adults have IQ scores that are normally distributed with a mean of 100.3 and a standard…

Q: Which MS Excel Tool shall be used with this problem? Dr. Hess has done work that suggests that…

A: Thank you for the question. According to our honor code can answer one question at a time. Since you…

Q: In a test of the mean time to repair automobile hail damage, sixteen randomly selected hail-damaged…

A: Sol:- The correct answer is: The mean number of days to repair is more than 12 business days (a =…

Q: Pumpkins from a local farmer have a mean weight of 16 pounds with a standard deviation of 2.5…

A: Given information: It is given that, Pumpkins from a local farmer have a mean weight of µ = 16…

Q: A data set includes weights of garbage discarded in one week from 62 The paired weights of paper and…

A: Claim: There is a linear correlation correlation between weights of the discarded paper and glass.

Q: Currently patrons at the library speak at an average of 63 decibels. Will this average change after…

A: Given , n = 66 , x¯ = 65.9 , s= 10

Q: To measure the effect of microfinance on women empowerment, a random sample of women was taken and…

A: Solution The samples are dependent if the observations are paired as before and after.

Q: The droning sound from lawn mowers is pervasive during the summer. Homeowner associations want to…

A:

Q: An employer measured the number of units sold by his 400 sales employees. He noted that 40 woman…

A: Given data  n1=40, sample mean x̄1=122, s21=60 n2=35, sample mean x̄2=126, s22=74, level of…

Q: What is the R-squared (R2) value? Interpret this value in context of the study. b. What is the…

A: From the given output,The multiple R squared value is 0.9808.The residual standard error is 0.1229.

Q: 5- Level refers to a categorical quantity under examination in an experiment as a possible cause of…

A: We refer to the Independent variable is the one which is manipulated or changed in a study. If the…

Q: An experiment was conducted on rodents to determine if the drug Haldol influenced the amount of…

A: According to the provided data, it is tested to see if there is any difference between at least two…