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Note :
We have used the excel data analysis tool to run the regression analysis.
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- • Control: 7.2, 7.4, 7.4, 7.7, 7.9, 7.9, 8.0, 8.2, 8.3, 8.4, 8.4, 8.5, 9.1, 9.2, 9.2 • Wild type: 5.6, 6.5, 6.7, 7, 7.5, 7.9, 7.9, 8, 8, 8.2, 8.4, 9, 9.1, 9, 9.1 • Scorpine: 0, 4.4, 5.3, 5.6, 4.1, 5.3, 5.9, 6, 6, 6.1, 6.2, 7, 7.5 4. Show the data in a graph (or graphs). What trends or patterns do you see? 5. Perform all steps of a hypothesis test to determine whether the treatments vary in their number of sporozoites, without transforming the data.49. In preparing a report on the economy, we need to estimate the percentage of business that plan to hire additional employees in the next 60 days. How many randomly selected employees must we contact in order to create an estimate in which we are 98% confident with a margin of 5%? 567 543 465 561The average time that Italy commute to work is 23.15 minutes (Best 4 Tourist Places, June 15, 2020). The average commute times in minutes for 18 cities are given in Table 3.1. Table 3.1 City Time (minutes) Rome 24.9 Milan 26.8 Naples 26.2 Turin 28.1 Palermo 31.7 Genoa 25.8 Bologna 23.3 Florence 32.1 Bari 28.5 Catania 24.4 Verona 29.3 Venice 24.8 Messina 38.1 Padua 28.3 Trieste 28.4 Taranto 24.6 Prato 20.1 Modena 23.4 1) What is the mode for these 18 cities? 2) Find 28th and 77th Percentile of commute times for these 18 cities.
- 20. A team at a factory would like to monitor the number of defects in a TV screen. Twenty-five samples of five TV screens are inspected. Which of the following control charts is the most appropriate for this scenario? a. xbar and R chart b. c-chart c. p-chart d. np-chart6. To promote domestic consumption, Country A's government wants to determine the impact on household annual expenditures on consumption items if small stimulus checks were sent monthly over a one year period. To determine if these small stimulus checks would increase household expenditures on consumption items, it chose five households at random, determined their annual expenditure on consumption items for the year before and sent the stimulus checks for a year. The table below shows total amount of annual expenditure on consumption items by the households before and after receipt of the checks. Based on these observations, determine whether there would be a statistically significant difference in the mean annual expenditure on consumption items for the entire population of the Country A if this policy were adopted for the entire country. Use a level of significant of a = .01. Recipient 1 2 3 4 5 Before Receipt ($, in thousands) 63 38 70 65 62 After Receipt ($, in thousands) 65 42 68…1. Explain the difference between z-tests (which use categorical data), and t-tests (which use numerical data). 2. Conduct a t-test, both when given statistics, and when given data. 3. Conduct a t-test, 2-sample t-test, and paired t-test. 4. Differentiate between the five types of tests we have learned so far.
- 1. A researcher was interested in understanding reproductive health among youth. She randomly selected a group of young persons and administered a questionnaire to collect information. Table 1 provides data on 10 respondents with their responses to selected questions. Respondent # How much of Gender a risk would Number of persons had sex with in the past months Frequency of Alcohol usage in the past 12 do you think you personally have of getting other STDS? 12 months (Risk of HIV) Moderate Risk Female No risk at all Little risk 1 Never Male Almost everyday Male Never Great risk Male Female 4 About once per week Once per month Almost everyday 1-3 drinks per month Moderate risk 6. No risk at all Female 1 7 Great Risk Male 3 8. No risk at all Female Never Little Risk No risk at all Female Male Almost every day About once per 9 10 month a. Refer to Table 1: Indicate the most appropriate measure of central tendency for each variable listed and give a reason for your choice. b. Suppose you…9. A student researcher is assigned the task of finding out if the level of education attained by a person depended on the income class to which he/she belonged. He interviews 60 persons. The results are recorded on the table below. Level of Income Bracket Education A в Attained High School 15 Graduate College Graduate With MA/PhD Degrees 2 10 3 4 5. The student applies a test of independence at 5% level. What is his conclusion?4. A researcher claims that the percentage of infants who receiveimmunizations is less than 80%. She selects a sample of size 750 infantsand 573 have received immunizations. c. Compute the P-value based on your test statistic.
- 5. A cancer patient signs up for a process to test a medicine, but she does not know whether she actually gets the actual medicine or a placebo. Which type of research is she involved in? Group of answer choices An Observational Study An Anecdote A Designed Experiment A Retrospective Study5) Accounting data for sales showed that in randomly selected 15 stores the quantities of products sold are: 509, 517, 502, 629, 830, 911, 847, 803, 727, 853, 757, 730, 774, 718, 904 Unsatisfied with those results, a company decided to start advertising campaign. After the campaign finished, the number of products sold in these same stores were: 517, 508, 523, 730, 821, 940, 818, 821, 842, 842, 709, 688, 787, 780, 901 Did the advertising campaign produce statistically significant results?5) Reynoldsburg surveys Summit HS students. They found 90% of students are tired at 7:10am and 40% of those students who are tired at 7:10am are chronically late to school. What percent of all Summit HS students are both are tired at 7:10am and are chronically late to school?