Help 6. Suppose we want to study the errors found in the performance of a simple task. We askjudges to report the number of people seen entering a major department store in onemorning. They find the mean number of shoppers is 975 with a standard deviation of 25.Assuming the distribution of counts is normal.a. What percentage of the counts will lie between 900 and 990?b. What percentage of the counts will lie below 975?c. What percentage of the counts will lie below 990?d. Between what two values will we find the middle 50% of the results?e. 75% of the counts would be less thanf. 95% of the counts would be between what two values?and7.WT.Y.1OP{KCBM.altmdcmdoption08工梦3 VgHeMISs7. Conduct a complete hypothesis test:Infants often respond to their parents' singing by listening and looking at them. We want toexamine whether singing to infants makes them more sociable. We test 39 infants whoseparents were asked to sing a lullaby to their infant every day for the next 2 weeks. Themean sociability rating after two weeks of singing was measured as M = 62 while listeningto music and they produce a M = 64.43. The mean of the population taking this test withoutmusic is µ = 59 (o = 13).a. Does singing to infants lead to a significant difference in the infants' sociability scores?Test using the.05 level of significance.b. What is the probability that we made a Type I error? What would be the error in terms%Dof independent and dependent variables?c. Is there a risk of a Type Il error? Explain.)237.}人K7.B.alt

Name: Help 6. Suppose we want to study the errors found in the performance o
Uploaded: 2024-03-05T11:52:21.000Z
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Description: Help 6. Suppose we want to study the errors found in the performance of a simple task. We askjudges to report the number of people seen entering a major department store in onemorning. They find the mean number of shoppers is 975 with a standard devi