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- Han Samples are collected from the River X and pH values are observed. 9 different pH values are listed in table 3. Table 3 Concentrations 4.2 3.8 6.0 3.5 8.1 4.9 4.1 3.2 4.0Draw box plot and find a. Bowley’s coefficient of skewness b. Karl Pearson’s coefficient of skewness c. Third momentA medical researcher randomly assigns 100 high-risk heart patients into two groups. One group will get open heart surgery and the other groups will get a transcatheter aortic valve replacement. She will compare the two groups to see how long they live after their procedures. What statistical test should she use to analyze the data? a. Chi Square Goodness of Fit Test b. Correlation c. One sample t-test d. Independent Samples t-test e. Factorial ANOVATen pregnant women were given an injection of Pitocin to induce labor.Their systolic blood pressures immediately before and after the injection were taken and define the paired differences to be "after - before". The following table shows the summary statistics. Use a 0.05 level ofsignificance. Intermediate CalculationsSample Size 10d-bar 3.1000SD 4.2019 The computed value of the test statistic is (final answer to 3 decimal places)Do the data provide sufficient evidence that injection of this drug changes blood pressure? (choose from Yes or No)
- Samples are collected from the River X and pH values are observed. 9 different pH values are listed in table 3. Table 3 Concentrations 3.55 4.01 5.38 3.22 8.05 5.25 4.67 3.67 3.5Draw box plot and find a. Bowley’s coefficient of skewness b. Karl Pearson’s coefficient of skewness c. Third moment Rubric Stages of Process Marks Imagine and Plan 2Composition 2Effort 1A researcher wants to examine the relationship between time spend on social media (variable X) and loneliness (variable Y) in young adults. A randomly sample of n = 52 young adults was asked how much time in average they spend on social media each day and how lonely day feel on a typical day. The partial computations of collected data produced the following results: SP = -14 MX = 10 SSx = 36 MY = 16 SSY = 49 A. Based on these results, is there a significant correlation between time spend on social media and loneliness among young adults? Use a Pearson correlation test with p < .05, 2-tails to answer this research question. Follow the steps of hypothesis testing and insert your answers below. In your calculations,round all numbers to two decimal places to avoid rounding errors. ANSWER H0: H1: Computed Pearson r = df for decision about H0: Critical r-value used for decision about H0: Decision about H0 (i.e., reject or fail to…Q2. A fast-food chain decided to carry out an experiment to assess the influence of advertising expenditure on sales. Different relative changes in advertising expenditure, compared to the previous year, were made in eight regions of the country, and resulting changes in sales levels were observed the accompanying table shows the results. Increase in advertising expenditure (%) 0 5 15 20 25 30 35 40 Increase in sales (%) 5 10 18 25 35 50 60 65 Determine the value of ∑X, ∑X2, ∑Y, ∑Y2, ∑XY. Where X represent independent variable and Y for dependent variable. [2] Determine and interpret the coefficient of correlation between the two variables. [1] Determine the value of regressions coefficients and write down the simple linear regression
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