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For the following exercises, consider this scenario: The population of a city increased steadily over a ten-year span. Thefollowing ordered pairs shows the population (in hundreds) and the year overthe ten-year span, (population, year) forspecific recorded years:
Predict when the population will hit 20,000.
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- John was calculating the peeds (mph) of vehicles traveling down Maple Street on two separate days at 9 am for an hour. Below is the data she collected. Wednesday's speeds: 32,28,24,17,39,44,64,33,27,21,38,40,60,30,25,37,30,25,35,30 Sunday's speeds: 18,27,34,37,49,55,63,61,48,30,27,17,17,15,26,46,25 1. Calculate the mean and median of each day. 2. Calculate the five-number summary of each day. a. Wednesday's Five-Number Summary. b. Sunday's Five-Number Summary. 3. Test each day for outliers. If they have outliers, identify them and adjust the five-number summary to reflect the outlier. (Remember to find IQR and then Upper and Lower Limits) a. Wednesday's Outlier Test b. Sunday's Outlier Test 4. Create a stacked box-and-whisker plot using the five-number summaries from Wednesday and Sunday. 5. What do you notice about the box-and-whisker plots? Describe the spread in each specifically.arrow_forwardA researcher wants to know how long it takes, on average, for a certain species of bacteria to divide. She watches 17 cells through a microscope and times how long it takes them to divide. She obtains the following data, in hours:8.1, 7, 7.4, 7.4, 6.6, 7.3, 7.5, 7, 7.7, 6.9, 7.9, 6.7, 6.7, 6.9, 7.5, 7.1, 7.3Assuming the population standard deviation is σ=0.4, construct a 89% confidence interval for the average time it takes this species of bacteria to divide.xˉ=α2=zα2=Margin of Error: E=We are 89% confident that this species of bacteria takes, on average, between ___hours and ___hours to divide.arrow_forwardThe cost for board exam review services costs P11500, P11750, and P11250 for years 2018, 2019, and 2020 respectively. What is the range (in %) for this data?arrow_forward
- #32 Survey: Customer Loyalty Are customers more loyal in the east or in the west? The following table is based on information from Trends in the United States. The columns represent length of customer loyalty (in years) at a primary supermarket. The rows represent regions on the United States.arrow_forwardA car manufacturer company shares the data of its one of the brands in 1086cc category during 2003 to 2009. The data listed in Table No.3. Table 3. The number of sales of a car in 1086cc category Year No. 1 Sales 3| 4 | 5 | 6| 7 | 3135 | 6922 | 7009| 7031| 3470| 2227| 404 2 (a) Let you are working in the data processing unit of this company. Compare years and sales by using suitable graphing technique and suggests why the company should make some changes in this product otherwise the company should discontinue the production of this model. (b) Apply a statistical technique that quantifies the relationship between the number of years and corresponding sales. Interpret the results that you obtained through statistical technique to justify your explanation.arrow_forwardA researcher wants to know how long it takes, on average, for a certain species of bacteria to divide. She watches 21 cells through a microscope and times how long it takes them to divide. She obtains the following data, in hours: 8.8, 7, 9.8, 8.4, 7.8, 8, 9.6, 7, 8.2, 8, 8.6, 8.6, 8.7, 7.3, 8.6, 7.3, 8.3, 8.6, 8.9, 7.6, 7.9 Assuming the population standard deviation is o = 0.6, construct a 99% confidence interval for the average time it takes this species of bacteria to divide. x = 82 = Margin of Error: E = We are 99% confident that this species of bacteria takes, on average, between hours and hours to divide.arrow_forward
- tion 2 of 15 Last summer, the Smith family drove through seven different states and visited various popular landmarks. The prices of gasoline in dollars per gallon varied from state to state and are listed below. $2.34, $2.75, $2.48, $3.58, $2.87, $2.53, $3.31 Click to download the data in your preferred format. CrunchIt! CSV Excel JMP Mac Text Minitab PC Text R SPSS TI Calc Calculate the range of the price of gas. Give your solution to the nearest cent. range: dollars per gallon DELL & 4. 7 8.arrow_forwardThe data give the average number of days in May that are clear and cloudy in two cities. Clear Cloudy Total Sacramento, CA 17 13 30 San Antonio, TX 24 30 Total 23 37 60 6,arrow_forwardA researcher wants to know how long it takes, on average, for a certain species of bacteria to divide. She watches 22 cells through a microscope and times how long it takes them to divide. She obtains the following data, in hours: 7.4, 8.6, 6.6, 7.3, 9.1, 8.3, 8.9, 7.3, 9, 8.9, 8.4, 9.3, 7.4, 8.8, 8, 7.2, 10, 7.9, 7.4, 7.3, 7, 8.6 Assuming the population standard deviation is o = 1, construct a 90% confidence interval for the average time it takes this species of bacteria to divide. za = Margin of Error: E = We are 90% confident that this species of bacteria takes, on average, between hours and hours to divide. Submit Question ||arrow_forward
- A researcher wants to know how long it takes, on average, for a certain species of bacteria to divide. She watches 17 cells through a microscope and times how long it takes them to divide. She obtains the following data, in hours: 8.1, 7.6, 7.7, 8.3, 8.5, 7.9, 8.1, 8.2, 8.2, 7.9, 8.6, 8, 7.9, 8.5, 8.2, 8.2, 8 Assuming the population standard deviation is o = average time it takes this species of bacteria to divide. 0.3, construct a 93% confidence interval for the Za 2 Margin of Error: E = We are 93% confident that this species of bacteria takes, on average, between hours and hours to divide. ||arrow_forwardA researcher wants to know how long it takes, on average, for a certain species of bacteria to divide. She watches 15 cells through a microscope and times how long it takes them to divide. She obtains the following data, in hours: 6.3, 7.1, 8.7, 6.1,7.4, 7.5, 6.4, 7.8, 7.5, 4.4, 6.1, 7.1, 5.9, 5.9, 7.6 Construct a 95% confidence interval for the average time it takes this species of bacteria to divide. 6.787 1.0155 1.0155 te %3D 0.025 Margine of Error: E = 47.0947 We are 95% confident that this species of bacteria takes, on average, between hours to divide. hours and Question Help: D Post to forumarrow_forwardA researcher wants to know how long it takes, on average, for a certain species of bacteria to divide. She watches 15 cells through a microscope and times how long it takes them to divide. She obtains the following data, in hours: 6.3, 7.1, 8.7, 6.1, 7.4, 7.5, 6.4, 7.8, 7.5, 4.4, 6.1, 7.1, 5.9, 5.9, 7.6 Construct a 95% confidence interval for the average time it takes this species of bacteria to divide. S = %D Margine of Error: E = We are 95% confident that this species of bacteria takes, on average, between hours to divide. hours andarrow_forward
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