Imagine that you look up a critical t value in a t- table and your observed t value for a specific  degress od freedom  lies between two critical values in the table. To be conservative, you would select the?

In the US, 42.3% of all people have type O blood, 40.8% have type A blood, 12% have type B blood and 4.9% have type AB blood. A researcher wants to see if the distribution of blood type is different for millionaires. The table below shows the results of a random sample of 897 millionaires. What can be concluded at the significant level of a = 0.1. For this study, we should use [x²GOF-Test Your friend Henry helped you with the null and alternative hypotheses... Ho: The distributions of blood types are the same between the general population and the millionaires. H₁: The distributions of blood types are NOT the same between the general population and the millionaires. You drew 897 samples, and the observed frequencies are recorded below. Please complete the table (round answers to at least 4 decimal places). Blood Type 0 A B AB Observed Frequency 375 The degree of freedom = 366 104 52 The test-statistic for this data = The p-value for this sample= Expected Frequency (Please show your…

For the 25 drives made with the new balls, calculate statistics that you think would be appropriate in describing the central tendency and the dispersion of the data. required information: Ted set up a test in which he mixed 25 of the new balls with 25 of the old type, then had a golf pro hit all 50 of them at a driving range. All 50 distances were measured and are listed in data file THORN02. For reader convenience, they are also 25 Drives with New Ball (Yards): repeated here. Ted has examined the visual descriptions of the data carried out in Chapter 2, but he would like to have some statistical summaries as well. NewBall ConBall 267.5 241.8 247.2 264.2 264.3 267.9 248.3 255.1 237.4 237.3 224.4 240.3 265.1 266.8 223.7 253.2 239.9 247.9 243.6 251.6 260.4 215.8 233.5 257.6 253.6 233.2 269.6 226.4 278.7 234.5 232.7 242.7 256.5 201.0 226.9 234.7 249.2 218.5 271.4 201.6 258.8 215.9 232.3 229.0 294.1 244.1 252.8 256.3 256.3 213.5

A survey of the population of 51 students in Psych 311 asks how many credits students are taking and obtains the following normally-distributed results: ∑ X= 686 and ∑X2= 9832.92. Using this information, answer the following three questions.  What is the percentile rank of a student who is enrolled in 15 credits? (Hint: This is the same thing as asking “what percentage of students is enrolled in 15 credits or less?”) MUST SHOW WORK FOR THIS PROBLEM What percentage of students are enrolled in between 12 and 18 credits? (MUST SHOW WORK FOR THIS PROBLEM) What is the 25th percentile? (Hint: This is the same as asking what score separates the bottom 25% of the distribution from the top 75%.) MUST SHOW WORK FOR THIS PROBLEM