1. State hypothesis 2. Decide directional/nondirectional 3. State the 1. Sample statistic 2. Test statistic

A hypothesis regarding the weight of newborn infants at a community hospital is that the mean is 23.1 pounds. A sample of seven infants is randomly selected and their weights at birth are recorded as 21.1, 26.1, 27.1, 28.1, 25.1, 32.1, and 32.1 pounds. What are the degrees of freedom?   Multiple Choice   7   31.7   6   23.1

1. A study asked students to report their height and then compare to the actual measured height. Assume that the paired sample data are simple random samples and the differences have a distribution that is approximately normal. Reported Height Measured Height 67.9 69.9 64.9 68.3 68 71 63 70 71 60 65 64 54 63 66 72 70.3 60.6 64.5 67 55.6 74.2 65 70.8 a) State the null and alternative hypotheses. b) Use EXCEL to construct a 99% confidence interval estimate of the difference of means between reported heights and measured heights. Attach your printout to this question, where the reported height is column A, measured height in column B, and the difference in column C. i) Open Excel and click DATA on the ribbon of the Excel. ii) Click Data Analysis. If Data Analysis is not available, please follow the instructions in Assignment 1. iii) Select Descriptive Statistics and click OK. iv) Enter the range of the heights including the label (A1:A13). v) Select Labels in First Row. vi) Select Summary…

Four scenarios of statistical studies are given below. Decide which study uses a population parameter. Answer O Lakeside Family Dentistry reported that 6 of the 15 patients who came in for a regular cleaning one day had at least one cavity. O As part of her senior project, Kaisa asked 84 of her classmates if they voted in the last presidential election. 39 said yes. O of 351 dog owners who were surveyed, 70 reported owning two dogs. The average finish time for the Ironman, Kona was 11:32 for the 1883 finishers, with an average swim time of 1:14, an average bike time time of 4:14.

Would the sampling distribution be wider or narrower?

46) The between-group varian ce and the within-group variance are sometimes referred to as 46) A) main effects. C) an ANOVA summary table. B) interaction effects. D) mean squares. noring 4 arauns to tect if they hae the ca aanc There are 64 5

14)  n gall up poll of 1125 adults, it was found that 47% fly never or rarely. Use a 5% significance level to test that the percentage of adults who fly never or rarely is 50%. (use p-value approach) a. Claim b. Ho H1 c. P-value d. Reject Ho Do not reject Ho e. Write a statement about the claim

A survey was conducted to determine whether hours of sleep per night are independent of age. A sample of individuals was asked to indicate the number of hours of sleep per night with categorical options: fewer than 6 hours, 6 to 6.9 hours, 7 to 7.9 hours, and 8 hours or more. Later in the survey, the individuals were asked to indicate their age with categorical options: age 39 or younger and age 40 or older. Sample data follow. Age Group Hours of Sleep 39 or younger 40 or older Fewer than 6 38 36 6 to 6.9 60 57 7 to 7.9 76 74 8 or more 66 93 (a) Conduct a test of independence to determine whether hours of sleep are independent of age. (b) What is your estimate of the percentages of individuals who sleep fewer than 6 hours, 6 to 6.9 hours, 7 to 7.9 hours, and 8 hours or more per night?

7. The correct and incorrect responses to a test question are listed according to major with the sample results given below. At the .05 significance level, test the claim that response and major are independent. Math English Correct Incorrect 53 27 43 37 claim null hypothesis.….. alternative hypothesis... Calculator Screen Name.... test statistic pvalue/alpha comparison.... decision Conclusion

12) Please provide a correct answer with a full method explanation and do not copy and past from other similar questions.