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- The accompanying data are x = advertising share and y = market share for a particular brand of soft drink during 10 randomly selected years. x 0.104 0.072 0.072 0.077 0.086 0.047 0.060 0.050 0.070 0.052 y 0.137 0.127 0.120 0.086 0.079 0.076 0.065 0.059 0.051 0.039 b)Calculate the equation of the estimated regression line. (Round your answers to four decimal places.) d)Calculate a point estimate of ?e. (Round your answer to five decimal places.)Each of the boxplots shown summarizes 24 student scores on a recent test in two different classes. The boxplots are drawn using a common numerical scale. Which of the following must be true? 1. The lower 25% of Class B are much more spread out than the lower 25% of Class A 2. More people scored below the lower quartile for Class A than Class B 3. The distribution for Class B is skewed left and has a noticeable outlier as well, while the distribution for Class A is somewhat skewed right 4.Class A had more people between the median and the lower quartile than Class B. 3.The distribution for Class A is somewhat symmetric, while the distribution for Class B is skewed right with a noticeable outlier as wellIn a certain populalion, let us assume that IQ scores are normally distributed with mean of 100 and standard devialion of 15. What percentage of the population have IQ scares more than 116? Select one: a. 0.6808 O b. 0.2327 O c. 0.3192 C d. 0.8577 e. 0.1423 f. 0.7673
- 1. The following data gives the number of social interactions of longer than 10 minutes in one week for a group of college students. 12 2 7 17 22 27 32 37 42 47 Compute the range, variance, and standard deviation.In this exercise involving paired differences, consider that it is reasonable to assume the populations being compared have approximately the same shape and that the distribution of paired differences is approximately symmetric. Two fuel additives are tested to determine their effect on miles per gallon for passenger cars. Suppose test results for 12 cars follow; each car was tested with both fuel additives. Additive Car 1 2 1 21.12 19.05 2 23.56 20.77 3 21.03 22.57 4 18.15 17.06 5 20.23 20.22 6 25.77 22.80 7 17.16 18.20 8 18.55 14.98 9 20.87 19.03 10 24.23 20.15 11 23.21 23.78 12 25.02 22.70 Use a = 0.05 and the Wilcoxon signed-rank test to see whether there is a significant difference between the median miles per gallon for the additives. State the null and alternative hypotheses. ⒸH: Median for additive 1 - Median for additive 2 2 0 H: Median for additive 1 - Median for additive 2 0 H₂: Median for additive 1 - Median for additive 2 = 0 ⒸH: Median for additive 1 - Median for…4.A college student is interested in whether there is a difference between male and female students in the amount of time they spend studying each week period the student gathers information from a random sample of male and female students on campus. The amount of time spent studying is normally distributed. The data are: Male Female 27 25 25 29 19 18 10 23 16 20 22 15 14 19 What statistical test should be done to analyze these data? Identify Ho and Ha for this study. Conduct the appropriate analysis. Should Ho be rejected? What should the researcher conclude? If significant, compute and interpret the effect size.
- In this exercise involving paired differences, consider that it is reasonable to assume the populations being compared have approximately the same shape and that the distribution of paired differences is approximately symmetric. Percents of on-time arrivals for flights in 2006 and 2007 were collected for 11 randomly selected airports. Suppose data for these airports follow. Airport 1 2 3 4 5 6 7 9 10 11 Percent On-Time 2006 71.78 68.23 78.98 78.71 78.59 76.67 What is your conclusion? 77.67 75.29 70.39 79.91 74.55 2007 68.69 65.88 79.40 Find the value of the test statistic. T = 63 ✓ 75.78 73.45 78.68 75.38 71.98 62.84 76.49 Use a = 0.05 to test the hypothesis that there is no difference between the median percent of on-time arrivals for the two years. State the null and alternative hypotheses. 72.42 O Ho: Median percent on-time in 2006 - Median percent on-time in 2007 = 0 H₂: Median percent on-time in 2006 - Median percent on-time in 2007 + 0 O Ho: Median percent on-time in 2006 -…In this exercise involving paired differences, consider that it is reasonable to assume the populations being compared have approximately the same shape and that the distribution of paired differences is approximately symmetric. Two fuel additives are tested to determine their effect on miles per gallon for passenger cars. Suppose test results for 12 cars follow; each car was tested with both fuel additives. Additive Car 1 2 1 20.12 18.05 2 24.56 22.77 3 23.03 23.57 4 19.15 16.06 5 20.23 21.22 6 24.77 22.80 7 16.16 17.20 8 18.55 15.98 9 21.87 20.03 10 25.23 22.15 11 23.21 21.78 12 24.02 23.70 Use ? = 0.05 and the Wilcoxon signed-rank test to see whether there is a significant difference between the median miles per gallon for the additives. State the null and alternative hypotheses. H0: Median for additive 1 − Median for additive 2 ≤ 0Ha: Median for additive 1 − Median for additive 2 > 0H0: Median for additive 1 − Median for additive 2 ≠ 0Ha:…10. STATEMENTS FIRST: THE SYMBOL FOR POPULATION MEAN IS X̄ SECOND: THE SYMBOL USED TO REPRESENT SAMPLE VARIANCE IS S 2 A. IF BOTH STATEMENTS ARE TRUEB. IF BOTH STATEMENTS ARE FALSEC. IF THE FIRST IS TRUE AND THE SECOND IS FALSED. IF THE FIRST IS FALSE AND THE SECOND IS TRUE 11. STATEMENTS FIRST: IF A DISTRIBUTION HAS TWO MODES, IT IS KNOWN AS MULTIMODAL SECOND: IF EACH DATA APPEARED ONCE ONLY, THEN THE MODE IS 0 A. IF BOTH STATEMENTS ARE TRUEB. IF BOTH STATEMENTS ARE FALSEC. IF THE FIRST IS TRUE AND THE SECOND IS FALSED. IF THE FIRST IS FALSE AND THE SECOND IS TRUE12. STATEMENTS FIRST: SPREAD IS ANOTHER TERM FOR THE MEASURE OF DISPERSION SECOND: VARIANCE IS THE MOST RELIABLE MEASURE OF DISPERSION A. IF BOTH STATEMENTS ARE TRUEB. IF BOTH STATEMENTS ARE FALSEC. IF THE FIRST IS TRUE AND THE SECOND IS FALSED. IF THE FIRST IS FALSE AND THE SECOND IS TRUE
- 5. About 8% of Americans drop out of high school. About 30% of Americans are republicans. Therefore, the probability of someone being both a high school drop out and voting republican is 2.4%. Group of answer choices Correlation does not imply causation Variables aren’t independent (A|B =/= B|A) Highly improbable events tend to get famous There will likely be a self-reporting bias Terrible Survey Design: Biased question Terrible Survey Design: Sampling technique Terrible Survey Design: Small sample sizeIf two large random samples are drawn from two populations, each having a mean of $100, the relevant sampling distribution of their difference has a mean of a. 200 b. The Sum of the 2 Sample Means C. 0 D. The difference between the two sample means.