Can somebody check my answers? Thanks 017: The statistical decision is to fail s
ID: 2948109 • Letter: C
Question
Can somebody check my answers? Thanks 017: The statistical decision is to fail so reject the null, and Ho is really fas (ie a Type II erroe) A researcher wants to determine whether high school students who attend an SAT preparation course score significantly different on the SAT than students who do not attend he preparation course. For those who do not artend the course, the popalation mean is 1050 (u- 1050). The 16 students who attend the preparation course average 1200 on the SAT, with a of 100. On the basis of these data, can the researcher conclude that the preparation course has a significant difference om SAT scores? Set alpha equal to .01 The appropria:Aetistical procedure for this example would be a M%pSD QIS: 018: The A. A-test s. z-test 019: Is this a one-tailed or a two-tailed test? one-tailed 020: The most appropr iate null hypothesis (in words) would be There is no statistical difference in SAT scores when comparing students who took the SAT prep course with take the SAT prep course. the general population of students who did not B. There is a statistical difference in SAT scores when comparing students who C. The students who took the SAT prep course did not score significantly higher D. The students who took the SAT prep course did score significantly higher on took the SAT prep course with the general population of students who did not take the SAT prep course on the SAT when compared to the general population of students who did not take the SAT prep course the SAT when compared to the general population of students who did not take the SAT prep course. 021: The most appropriate null hypothesis (in symbols) would be B. ASATprep 1200 C. ?ATpreps 1050 D. ?ATprep 21050 022: Set up the criteria for making a decision. That is, find the critical value using anut alpha-01. (Make sure you are sign specific: + ;-; or ± ) (Use your tables) Summarize the data into the appropriate test statistic Steps 023: What is the numeric value of your standard error? 100 100Explanation / Answer
18) option A is correct ;as populaiton std deviation not known
19)option B is correct
20)
option A is correct
21)
optin A is corect
22)
critical value at (n-1=15)df and 0.01 level =-/+ 2.947
24)
std error =std deviaiton/sqrt(n)=100/sqrt(16)=25
(all ur answers are correct)