Author: Anonymous

Panoramas: El Caribe. Based on the information in Panoramas, select the correct answer from the following multiple choice questions about the Caribbean. If the answer is not included, select Ninguna de las anteriores. (1 point each; 6 points total)   1. En el Morro, la gente va para hacer [1] y [2] 2. Muchos turistas visitan la República Dominicana por sus [3]. 3. La mejor manera de conocer el Viejo San Juan es [4].  4. [5], como la salsa y el merengue, son muy importantes en la vida diaria de la gente en Cuba. 5.El deporte más popular en Puerto Rico, Cuba y República Dominicana es [6]. 

A government analyst wishes to compare response times of two different public service systems. A sample of municipal offices is selected at random. Some offices use a centralized digital processing system, while others use a traditional manual processing system. The response time for processing citizen requests (in hours) is recorded for each office. Use the summarized data below to determine if there is a difference in mean response time at the 0.05 significance level. Processing System n mean standard deviation Centralized Digital 38 3.65 1.68 Traditional Manual 32 5.01 1.77   State the hypotheses for this test.H0: [a1]Ha: [a2] State the decision rule.[dr] Determine the test statistic.[ts] Determine the p-value.[p] What conclusion should be made?At the 0.05 level, there [e1] significant evidence to claim there is a difference between centralized digital and traditional manual processing system in the [e2] for processing citizen requests.

A department director wants to determine whether there is a difference in employee productivity between those who work remotely and those who work in the office. Two groups of employees are tracked over a three-month period: one group works fully remote, and the other works in-office. Productivity is measured using the number of tasks completed per week, and the results are compared between the two groups. Which type of test should be used for this scenario?

A large farm is wants to test if there are any difference in corn production based on fertilizer type. The scientist compares a standard organic fertilizer, a new chemical fertilizer, and a slow-release granular fertilizer. Several plots of land of equal size and soil quality will be randomly assigned to receive one of the fertilizer types. The corn yield, measured in bushels per acre, for each plot will be recorded at the end of the harvest season and analyzed. Which type of test should be used for this scenario?

Round answers to three decimal places. A random sample of office works participates in a study to compare typing speeds using a standard keyboard versus an ergonomic keyboard. Each worker completed the same typing task—once using a standard keyboard and once using an ergonomic keyboard.  For each participant, the order in which they tested the keyboards was randomly determined. The typing speed (in words per minutes) for each person was recorded for both keyboards. The data is summarized below. Difference  n mean standard deviation ergonomic – standard 37 7.291 1.725   Determine the 90% confidence interval to estimate the mean difference in typing speeds using the two keyboards: ([lower], [upper])  What is the margin of error for your interval? [b]

Is there a difference in college students’ GPA for STEM majors compared to Business majors? A random sample of 80 STEM majors and 80 Business majors reported their current cumulative GPA. The 95% confidence interval to estimate the mean difference (STEM – Business) in college students’ GPA was determined to be (0.0487, 0.832).  Does this scenario involve matched pairs or two independent samples?[a] Fully interpret the interval in context.With 95% confidence, it is estimated that the [b1] for [b2] college students that are STEM majors is between [b3] points and [b5] points [b6] than Business majors. Does the interval support that the mean GPA for college students that are STEM majors is significantly different than Business majors?[c]

A study was conducted to determine if there are any differences in daily water usage among households in various community types (rural, suburban, or urban). 100 households were randomly selected from each community type. Each household reported the typical amount of water used per day (in gallons). What is the explanatory variable for this study?[a] What is the response variable for this study?[b] What hypotheses should be tested?H0: [c1]Ha: [c2] What test statistic is needed for this test? [d] The p-value associated with this test is 0.0386. What decision should be made at the 0.1 level?[e] **You will type your conclusion for this problem in the next question.**

Are there any differences in grocery spending for college students based upon where they live? To investigate this question, a random sample of college students were asked where they live (university housing, rental property near campus, or at home) and how much they typically spend on groceries per month. The data is summarize below. Housing Type n mean standard deviation min max Q1 Q3 University Housing 40 121.89025 11.227737 103.04 147.03 112.265 130.785 Rental Property Near Campus 52 215.58808 15.843158 181.21 252.66 204.43 228.31 At Home 32 80.305625 9.3693054 60.36 99.19 73.835 87.11   What is the categorical variable involved in this scenario?[a] What is the quantitative variable involved in this scenario?[b] We wish to conduct a one-way ANOVA test for this scenario. Is the requirement of normally distributed populations satisfied? [c1] Is the requirement of equal population standard deviations satisfied? [c2] Based on the boxplots, there [d] to be at least one mean that differs significantly from at least one other mean.

A marketing analyst wants to examine whether the customer satisfaction rating differs among these types of promotional strategies: email campaigns, social media ads, and in-store discounts. Customers are randomly exposed to one of the marketing methods, and afterward, each rates their satisfaction on a numeric scale from 0 to 10 with the brand on a standardized survey. Which type of test should be used for this scenario?

Round answers to three decimal places. A random sample of experienced drivers participated in a simulator study to assess reaction time under two different lighting conditions. Each driver completed the same driving course twice—once during simulated daylight and once during simulated nighttime conditions. For each participant, the order in which they experienced the conditions was randomly determined. The reaction time (in seconds) to unexpected obstacles for each person was recorded for each condition. The data is summarized below. Difference  n mean standard deviation daylight – nighttime 28 0.845 1.572   Determine the 90% confidence interval to estimate the mean difference in reactions times under the two conditions: ([lower], [upper]) What is the margin of error for your interval? [b]