A group compiled the following estimates on consumer use of e-mail worldwide. Number of users (in millions) Messages per day (in billions) Year 2015 2587 205.6 2017 2761 225.3 2019 2944 246.5 (a) Complete the last column of the table by calculating the estimated number of messages per day that each user receives. (Round your answers to one decimal place.) Number of users Messages per day (in billions) Messages per person per day Year (in millions) 2015 2587 205.6 2017 2761 225.3 2019 2944 246.5 (b) The predicted number of messages per person per day in 2019 is how many times the estimated number in 2015? (Round your answer to two decimal places.) times greater

A group compiled the following estimates on consumer use of e-mail worldwide. Number of users (in millions) Messages per day (in billions) Year 2015 2587 205.6 2017 2761 225.3 2019 2944 246.5 (a) Complete the last column of the table by calculating the estimated number of messages per day that each user receives. (Round your answers to one decimal place.) Number of users Messages per day (in billions) Messages per person per day Year (in millions) 2015 2587 205.6 2017 2761 225.3 2019 2944 246.5 (b) The predicted number of messages per person per day in 2019 is how many times the estimated number in 2015? (Round your answer to two decimal places.) times greater

Mathematics For Machine Technology

8th Edition

ISBN:9781337798310

Author:Peterson, John.

Publisher:Peterson, John.

Chapter29: Tolerance, Clearance, And Interference

Section: Chapter Questions

Problem 16A: Spacers are manufactured to the mean dimension and tolerance shown in Figure 29-12. An inspector...

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Spacers are manufactured to the mean dimension and tolerance shown in Figure 29-12. An inspector measures 10 spacers and records the following thicknesses: 0.372" 0.376" 0.379" 0.375" 0.370" 0.373" 0.377" 0.378" 0.371" 0.380" Which spacers are defective (above the maximum limit or below the minimum limit)? All dimensions are in inches.
A hypothetical data regarding consumption of fast food observed among the adults of a country is shown in the table below Gender Number (in thousand) People above 18 years Fast food consumers Male 62,384 28,689 Female 66,778 31,083 Use the data to calculate: Sex ratio of male to female fast food consumers Proportion of female who consume fast food Prevalence per 1,000 of fast food consumption in: men only women only total population aged above 18 years
The prices and the numbers of various items produced by a small machine and stamping plant are reported below. Use 2010 as the base. 2010 2018 Item Price (in $) Quantity Price (in $) Quantity Washer 0.07 17,000 0.10 20,000 Cotter pin 0.04 125,000 0.03 130,000 Stove bolt 0.15 40,000 0.15 42,000 Hex nut 0.08 62,000 0.10 65,000 a. Determine the Laspeyres price index. (Round your answer to 2 decimal places.) b. Determine the Paasche price index. (Round your answer to 2 decimal places.)
Kaitlyn measures the upload speed in megabits per second of her home broadband internet connection during peak hours and off-peak hours. The results are provided in the accompanying table. Peak Off-Peak 5.83 5.14 6.05 6.80 7.14 6.98 3.54 5.77 5.45 7.27 5.90 6.62 5.81 6.19 4.82 6.08 6.37 6.59 4.65 5.58 5.30 7.41 6.48 6.26 5.96 6.37 5.79 6.31 6.84 6.55 5.06 4.95 5.61 7.03 6.45 6.77 Examine the results of Kaitlyn's test to determine the statements that compare the medians and interquartile ranges of the data sets to each other in terms of this situation. Select the two correct answers. The median upload speed during peak hours is 5.905 megabits per second, which is less than the median upload speed during off-peak hours, 7.005 megabits per second. The upload speeds during peak hours are slower on average compared to off-peak times. The median upload speed during peak hours is 6.37 megabits per second, which is greater than the median upload speed during…
In a study of exhaust emissions from school buses, the pollution intake by passengers was determined for a sample of nine school buses used in the Southern California Air Basin. The pollution intake is the amount of exhaust emissions, in grams per person, that would be inhaled while traveling on the bus during its usual 1818‑mile trip on congested freeways from South Central LA to a magnet school in West LA. (As a reference, the average intake of motor emissions of carbon monoxide in the LA area is estimated to be about 0.0000460.000046 grams per person.) The amounts for the nine buses when driven with the windows open are given. 1.151.15 0.330.33 0.400.40 0.330.33 1.351.35 0.380.38 0.250.25 0.400.40 0.350.35 A good way to judge the effect of outliers is to do your analysis twice, once with the outliers and a second time without them. Give two 90%90% confidence intervals, one with all the data and one with the outliers removed, for the mean pollution intake among all school buses…