B answer options: 1st blank: A) one sided B)two sided UFO Signters\' Personaliti

Question

B answer options:

1st blank:

A) one sided

B)two sided

UFO Signters' Personalities a 1993 study, researchers took a sample of people who cla med to have had an intense experience with an unidentified flying object (UFo) and a sample of people In who did not claim to have had such an experience (Span et al., 1993). They then compared the two groups on a wide variety of variables, including IQ. Suppose you 96 so you want to test HoH 96 Ha 96 want to test whether or not the average IQ of those who have had such a UFO experience is higher than a. Identify clearly what the symbol H represents in this context. In this context, u represents the average IQ of all people who did not claim to have had an intense experience with a UFO In this context, H represents the average IQ of all people in the study. In this context, u represents the average IQ of all people who claim to have had an intense experience with a UFO b. Is this a one-sided or a two-sided test? Explain how you can tell 96 This is a test because you wish to test whether the average IQ of this group is 25 101.6 8.9 The sample mean IQ of the people in the stud who cl aimed to have had an intense experience with a UFO was. the standard deviation of these IQs c. Does this information enable you to check the technical conditions complete ly? What needs to be true for this procedure to be valid? The population of IQ scores for this group does not need to be approximately normally distributed. The sample needs to be larger 30) The population of IQ scores for this group should be approximately normally distributed. The sample needs to be larger (>30) The population of IQ scores for this group does not need to be approximately normally distributed. The sample needs to be representative of all individuals who claim to have had such an experience The population of IQ scores for this group should be approximately normally distributed. The sample needs to be representative of a individuals who claim to have had such an experience d. Calculate the test statistic a nd draw sketch with shaded area corresponding to obtaining a test statistic as extrem e or more extreme than this one observed for the sample of 25 UFO observers Round your answer to two decimal places Answer *1 the is +/-2% e. Use technology to determine the p -vi Round your answer to four decimal places Answer *1 the is +/-2% f. Write a sentence interpreting the p -va e in the context of this sample and these hypotheses. Summarize the conclusion of your test in context. Round your answer to two decimal places 6, then you could expect to see a random sample of 25 people from this group with an average IQ of at least 101.6 in about If the average IQ of this group is really an uncommon occurrence, of samples, by random chance alone. Because this 96 convincing evidence that the mean IQ of the population (those who claime d to have had an intense experience with a UFO) is greater than

Explanation / Answer

Given that,
population mean(u)=96
sample mean, x =101.6
standard deviation, s =8.9
number (n)=25
null, Ho: =96
alternate, H1: >96
level of significance, = 0.05
from standard normal table,right tailed t /2 =1.711
since our test is right-tailed
reject Ho, if to > 1.711
we use test statistic (t) = x-u/(s.d/sqrt(n))
to =101.6-96/(8.9/sqrt(25))
to =3.146
| to | =3.146
critical value
the value of |t | with n-1 = 24 d.f is 1.711
we got |to| =3.146 & | t | =1.711
make decision
hence value of | to | > | t | and here we reject Ho
p-value :right tail - Ha : ( p > 3.1461 ) = 0.00219
hence value of p0.05 > 0.00219,here we reject Ho

ANSWERS
---------------
PART A.
represents the average IQ of all people who claim to have had an intense experience with a UFO
PART B.
this is a right tailed test because you wish to test whether the average IQ of this group is >96
PART D.
t=3.146
p=0.00219
null, Ho: =96
alternate, H1: >96
test statistic: 3.146
critical value: 1.711
decision: reject Ho
p-value: 0.00219

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