Question

In: Math

In psychology, there is a particular Mental Development Index (MDI) used in the study of infants....

In psychology, there is a particular Mental Development Index (MDI) used in the study of infants. The scores on the MDI have approximately a normal distribution with a mean of 100 and standard deviation of 16. We are going to randomly select 64 children and average their MDI scores. What is the probability that the average is greater than 102?

Solutions

Expert Solution

Solution :

Given that ,

mean = = 100

standard deviation = = 16

n = 64

= = 100

= / n = 16 / 64 = 2

P( >102 ) = 1 - P( < 102)

= 1 - P[( - ) / < (102-100) /2 ]

= 1 - P(z < 1)

= 1- 0.8413 = 0.1587

Probability = 0.1587

milcah answered 1 year ago
Next > < Previous

Related Solutions

5. The Mental Development Index (MDI) of the Bayley scales of Infant development is a standardized...
5. The Mental Development Index (MDI) of the Bayley scales of Infant development is a standardized measure used in studies with high risk infants. It has an approximately normal distribution with a mean of 100 and a standard deviation of 16. a. What proportion of infants have an MDI of at least 120? b. What proportion of infants have an MDI of less than 70? c. What proportion of infants have an MDI between 84 and 116? Now find the...
psychology: To write objective about mental health nurse, reasearch the role of nursing mental health, for...
psychology: To write objective about mental health nurse, reasearch the role of nursing mental health, for example education requirements, scope of practice, evidence base writing, scientific writing, very clear simple and easy to locate references, plagiarsm free, please use any publication that supporting like American Nurses Association, Nursing journal, 3 references not older than 5 years. 4 pages plus a cover sheet.
explain Development Administration Development Planning human development index
explain Development Administration Development Planning human development index
chapter 8: Human Development Assignment: Developmental Psychology Instructions: Select an adult to study (someone who is...
chapter 8: Human Development Assignment: Developmental Psychology Instructions: Select an adult to study (someone who is a prominent person, singer/actor, politician, athlete, or someone in the news), I prefer president Donald Trump Prepare a 700-1000 word paper in which assess the following issues: What family issues or support systems may have influenced this person's learning style and behaviors? Select two theories of learning and apply them to the person you selected to study How does each theory explain their behavior,...
(10 Point) The Human Development Index (HDI) is a composite statistic of indicators, which are used...
(10 Point) The Human Development Index (HDI) is a composite statistic of indicators, which are used to rank countries into four tiers of human development. a. What are the main factors taken into consideration when constructing the new HDI (the sub-elements of the index)? b. How is the new HDI calculated (the equation)? c. Following countries has HDI values as Bangladesh 0.515; Canada 0.911; Russian Federation 0.78; China 0.699; Burkina Faso 0.343 What can you tell about their development level?...
A study of iron deficiency in infants compared samples of infants whose mothers chose different ways...
A study of iron deficiency in infants compared samples of infants whose mothers chose different ways of feeding them. One group contained breast-fed infants. The children in another group were fed a standard baby formula without any iron supplements. Her are summary results on blood hemoglobin levels at 12 months of age: Group n mean x s Breast-fed 25 15.4 2.2 Formula 32 17.1 1.9 Part a: We want to see if the mean hemoglobin level is greater among formula-fed...
Discuss coordinated joint attention as a frame for language development in infants
Discuss coordinated joint attention as a frame for language development in infants
Cognitive Psychology- Mental Representation: Mental Rotation Experiment a. Why did Shepard & Metzler’s (1971) findings suggest...
Cognitive Psychology- Mental Representation: Mental Rotation Experiment a. Why did Shepard & Metzler’s (1971) findings suggest that the mental images were similar to real images? b. In demonstrations like this, participants often report that they mentally rotate the objects in their minds in order to make their same/different judgments, so why did researchers decide to take reaction time measurements also? c. What do you think was the purpose of using simple line drawings as experimental stimuli? How do you think...
A study of iron deficiency among infants compared samples of infants following different feeding regimens. One...
A study of iron deficiency among infants compared samples of infants following different feeding regimens. One group contained breast-fed infants, while the infants in another group were fed a standard baby formula without any iron supplements. Here are summary results on blood hemoglobin levels at 12 months of age. Group n x s Breast-fed23 13.3 1.6 Formula 20 12.7 1.7 Carry out a t test. Give the P-value. (Use α = 0.01. Use μbreast-fed − μformula. Round your value for...
A study of iron deficiency among infants compared samples of infants following different feeding regimens. One...
A study of iron deficiency among infants compared samples of infants following different feeding regimens. One group contained breast-fed infants, while the infants in another group were fed a standard baby formula without any iron supplements. Here are summary results on blood hemoglobin levels at 12 months of age. Group n x s Breast-fed23 13.3 1.6 Formula 20 12.7 1.7 Carry out a t test. Give the P-value. (Use α = 0.01. Use μbreast-fed − μformula. Round your value for...
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT