A manager is interested in determining if the population standard
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- The Insurance Institute for Highway Saftey publishes data on the total damage suffered by compact automobiles in a series of controlled, low-speed collisions. A sample of the data in dollars, with brand names, removed, is 950,650,850,750 The interquartile range of the above data is?Test the hypothesis that the population GPA of all students in MAT125 is not equal to 2.95. Test at the 0.05 level of significanceBob lost his research notebook containing the data from the original set of samples. Bob collects data from a new random sample of 30 aquifers and obtains a test- statistic of-2.444. Using the information from Bob's new set of data, what is the approximate P-value for Bob's hypothesis that the mean nitrogen content in aquifers has decreased due to new restrictions on waste product disposal from poultry farms? O a. Larger than 0.1 O b. Between 0.02 and 0.05 O c. Larger than 0.2 O d. Between 0.025 and 0.05 O e. Between 0.01 and 0.025
- Parker's Pavers has determined that a paver measuring 5 inches long has a z-score of +1 and a paver measuring 5.5 inches long has a z-score of +2.What is the mean length of the pavers produced at Parker's Pavers?The mean life span of an African savanna elephant in the wild used to be 60 years. A recent sample of 15 deceased elephants in the wild yielded a mean life span of 62 years. Assume a normally distributed population with = 6 years. Test if the population mean life span of African savanna elephants has increased, using a = 0.05. Select one: O a. p-value = 0.0984, do not reject Ho. O b. p-value = 0.0984, reject Ho. c. p-value = 0.1968, do not reject Ho. d. p-value = 0.4522, do not Reject Ho.The Southern Luzon Expressway was designed to carry a free-flow speed of 50kph and a capacity of 4000 vehicles per hour. At a certain point near theintersection of a road leading to Laguna there were 3600 vehicles counted,what is the space mean speed of these vehicles in kph?
- When dragons on planet Dathomir lay eggs, the eggs are either green or yellow. The biologists have observed over the years that 33% of the eggs are yellow, and the rest green. Next spring, the lead scientist has permission to randomly select 58 of the dragon eggs to incubate. Consider all the possible samples of 58 dragon eggs. What is the mean (u) number of yellow eggs in samples of 58 eggs? (Please show your answer to 1 decimal place) What is the standard deviation (o) in the number of yellow eggs in samples of size 58? O = (Please show your answer to 1 decimal place)To start this assignment, let's run a chi-square test in SPSS. Let's imagine that you are interested in political party affiliation. The first step in your research study is to determine whether political party affiliation is equally distributed across all possible categories in your data, including: 1 = Republican 2 = Democrat 3 = Independent 4 = Other To answer this question, run a one-way chi-square test in SPSS using the "polparty" variable. Based on the results of the analysis, what is your obtained chi-square test statistic? Enter your answer rounded to three decimal places (i.e., 10.001, not 10, not 10.1, not 10.01).A top graduate busness school is interested in the starting of salaries of their MBA graduates. A survey consisting of all the graduates from previous years was one and te results displaye in the table blow: n mean median std.dev std. error MBA's 175 11500 8700 *** 144 (a) Determine the value of '***'? (b) Explain what is meant by samplingistribution of the mean in the context of MBA gradutes starting salaries? (c) What type of distrbution will the sample distribution of the mean for MBA gradatues' starting salaries follow? Give reasons for your answer. (d) What are the available point estimator and estimate of the population mean starting salary? (e) Which of these estimators in 'Part (c)' above is unbiasd? Give reason for your answer. (f) Identify an availale point estimate for the population variance? (g) Construct and interpret a 82% confidence interval of the population mean starting salary?
- A magazine conducted a survey on whether dollar coins or quarters would be left on a busy sidewalk the longest. Theyrecorded the amount of time each coin was left on the sidewalk before being picked up. According to their results the dollar coins remained a mean time of 390 seconds while the mean length of time that the quarters stayed on the sidewalk was 5.75 minutes. Assume that these means are based on samples of fifty 1-dollar coins and forty-five quarters and that the two-samplestandard deviations are 105 seconds and 72 seconds,respectively. Find a 99% confidence interval for the difference between the corresponding means.n 10 of 16 > Here is a stemplot of the areas of the 46 counties in South Carolina. Note that the data have been rounded to the nearest What is the area of the largest South Carolina county? 10 square miles (mi?). O 655 square miles 3 9999 4 0116689 501115566778 6 47899 7 01245579 8 0011 13 10 8 11 390 square miles 122 square miles O 12.2 square miles O 1,220 square miles Key: 64 represents a county with an area of 635 to 644.99 9. 233 12 2 square miles.
