WK9Assgn1_Hemphill_L

An economist wishes to determine whether there is evidence that the average family income in a community is less than $75,000 or not. Should she use a two-tail or upper tail or lower tail hypothesis test? Explain.   (d) Briefly explain the steps needed for a completely randomized experimental design in Analysis of Variance. Give a real world example to clarify. Use at least 8 sentences to answer this question.                                                                         (e) What is multiple regression analysis? What are the differences between the simple linear regression analysis and the multiple regression analysis? Give a real world example to clarify. Use at least 8 sentences to answer this question.

A brokerage firm wants to conduct a study to see if there is a linear relationship between the size of an account and the number of trades conducted each year. What would be the most appropriate procedure to use to analyze data to answer this question? Only choose a test that handles multiple comparisons if such a test is needed. O ANOVA (Analysis of Variance) O Regression Test of Slope or Correlation O Test for a Difference of Proportions O Chi-square test of association O Test for a Difference of Means

[Multi-period inventory] STH hospital currently uses two types of surgical gloves (G1 and G2) for their healthcare workers. The annual demand for each is normally distributed. For G1 the mean is 5,000 pairs with a variance of 3,000; for G2 the mean is 8,000 pairs with a variance of 5,000. Each pair of gloves costs $3 (regardless of type), the cost to place an order is $100, and STH uses an annual holding cost of 20% of the value. Demand between G1 and G2 is independent. STH uses an (Q,R) system where Q is determined by the EOQ and a service level of 97% is used. The replenishment lead time is 5 weeks for each glove type. (You can assume each year has 52 weeks.) a. Determine the order quantity Q, safety stock, and reorder point R for each type of gloves. AB b. According to the risk pooling strategy, STH decides that is will standardize by using G1 to meet all demand for gloves. Determine the new order quantity Q, safety stock, and reorder point R for G1

A one-way between subjects analysis of variance should be used instead of a one-way within subjects ANOVA in which of the following experiments? Comparing the level of authoritarianism of insurance salesmen, medical doctors, and dentists Examining the performance of a group 15 students at 0 weeks, 10 weeks, and 20 weeks Assessing the weight gain of a group of infants at 1 month, 2 months, and 3 months None of the above

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To investigate the impact of texting while driving on road traffic accidents (RTA), two groups of study participants were recruited; Group A was involved in an RTA in the 30 days that preceded the study, unlike Group B. Participants from both groups were asked questions regarding the history of their driving attitudes, including texting while driving. What measure of statistical association would be derived? Odds ratio       Relative risk       T-test       Analysis of variance       Mea

The analysis in Table 10–12 is from a hypothetical study comparing performance of children with communication disorders, their chronological age-matched peers, and their communication age-matched peers. The study had two independent variables: a group variable that was nonexperimental and a method variable that was experimental. The information reported includes descriptive statistics for the three groups of children across the two methods. The inferential data analysis was a two-way analysis of variance (ANOVA) with group and method as the independent variables. First, examine the descriptive statistics. What do you think might have happened in this study? You might consider entering the means in a spreadsheet and generating a bar graph or line graph.

Fil Glaucoma is an eye disease that is manifested by high intraocular pressure. The distribution of intraocular pressure (I0P) in the general population is approximately normal with an average of 15 mm Hg and a variance of 9 mm Hg. If the normal range of intraocular pressure is considered between 12 mm Hg and 20 mm Hg, What is the percentage of the general population that will be in the normal range? a. 4%b. 2% c. 0.7938 d. other value e. 85% f. 1.67

A two-way analysis of variance involves...