ICS stu lege sampled 11 OKS in re, and ecordec number of pages in each textbook and its cost. The bivariate data is shown below, Number of Pages (x) Cost(y) 859 118.26 264 34.96 738 116.32 820 115.8 654 86.56 990 139.6 322 41.08 965 132.1 858 132.12 595 90.3 221 27.94 A student calculates a linear model y = x + . (Please show your answers to two decimal places) Use the model above to estimate the cost when number of pages is 558 Cost = $ (Please show your answer to 2 decimal places.) %3D

Hi, I'm stuck with question 2. Question 1 given the example for this question

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Individual actions can play a large role in the overall health of our planet. A researcher interested in evaluating environment friendly behaviors evaluated how often people recycle (per month) based on whether they have an overall optimistic or an overall pessimistic attitude toward eco-friendly behaviors. The results from this hypothetical study are given in the table.  Test whether or not recycling behaviors differed between groups using a .05 level of significance. State the value of the test statistics and the decision to retain or reject the null hypothesis. Compute effect size using eta- squared (n^2). Pessimistic Optimistic 3 4 0 9 4 6 2 8 1 9 6 5 3 6 5 8 0 6 5 7

On a particular proposal of national importance, males and females cast votes as included in the following table   In Favor Opposed Undecided Male 90 65 43 Female 115 74 32 Suggest an appropriate test for the data and analyze it at 1% level of significance.

Indicate which of the following are measures of spread.  (a)Inter quartile range (b)Mean (c)Range (d)Variance

Choose the appropriate statistical test. When computing, be sure to round each answer as indicated. A dentist wonders if depression affects ratings of tooth pain. In the general population, using a scale of 1-10 with higher values indicating more pain, the average pain rating for patients with toothaches is 6.8. A sample of 30 patients that show high levels of depression have an average pain rating of 7.1 (variance 0.8). What should the dentist determine? 1. Calculate the estimated standard error. (round to 3 decimals). [st.error] 2. What is thet-obtained? (round to 3 decimals). 3. What is the t-cv? (exact value) 4. What is your conclusion? Only type "Reject" or Retain"

In a study performed on comfort food eating during times of stress, it was found that mean rated comfort food consumption level (on a scale from 1-20) for a group of students undertaking their exam period was 14.  In comparison, a group of students who were not undertaking exams or examination preparation had a mean rated comfort food consumption level of 10.  The pooled estimate of the population variance was 64.  What is the estimated effect size (d) of the study?       0.80       0.06       0.50       2.00

The article cited in Exercise 19 provides measures of electrical conductivity (in uS/cm). The results are presented in the following table. Sample Size 49 Location Mean SD Upstream 463 208 Midstream 363 98 31 Downstream 647 878 30 Can a one-way analysis of variance be used to determine whether conductivity varies with location? Or is one of the necessary assumptions violated? Explain.