just need help with letters e. and f. in this question Perception of child\'s si
ID: 3054380 • Letter: J
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just need help with letters e. and f. in this question
Perception of child's size 7.3.3 In a study of parents' perceptions of their children's size, researchers Kaufman et al. (Current Biology, 2013) asked parents to estimate their youngest child's height. The researchers hypothesized that parents tend to underestimate their youngest child's size because the youngest child is the baby of the family and everybody else is the family appears bigger compared to the baby. The sample of 39 parents who were surveyed underestimated their youngest child's height by 7.50 cm, on average; the standard deviation for the dif- ference in actual heights and estimated heights was 7.20 cm and the data are not strongly skewed. a. Which of the following is an appropriate null hypothesis A. Parents' estimate of their youngest child's height is B. Parents tend to overestimate their youngest child's C. Parents tend to underestimate their youngest child's b. Which of the following is an appropriate alternative A. Parents' estimate of their youngest child's height is B. Parents tend to overestimate their youngest child's C. Parents tend to underestimate their youngest child's for this study? accurate, on average height, on average. height, on average. hypothesis for this study? accurate, on average. height, on average. height, on average 436Explanation / Answer
a) Null hypothesis : Parents assume difference in the height of their last child to remaining children is negligible. Hence accordingly, option A is correct
b) Alternate hypothesis: The parents tends to underestimate the height of their last child. It is one tailed test. Hence, accordingly option B is the right choice.
c) The actual obserervational units are 7.5 cm which is estimated height. Hence, the option D is apt.
d) The parameter in any study is the Probability that correctly estimate.
e) In the simulation based approch, basically the factors taken inti consideration are large no of observations, more complexity, multiple iterations. Further the decision of an individual doesn't follow any specific formula to stimulate the results.
f) As mentioned that simulation approach not valid, the theoritical approach where we have the inputs that data is not skewed is the most important thing to be considered. If the data is approximately normal, the general tests in theoritical approach such as Z test can be used.
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