A developmental psychologist is determining problem solving, Ask an Expert

Statistics

A developmental psychologist is determining problem solving capability in children. Random samples of 7, 9, and 11 year olds children are obtained with the n=8 in each sample and each child is given the problem solving test in which higher scores point out better problem solving. The data are as follows: 7 year olds: mean = 8.1 s²= 2.45; 9 year olds: mean= 9.44, s²= 4.7; 11 year olds: mean = 14.2, s² = 5.92 and sum of X squared EX² = 2941.60. What can be concluded regarding age differences in problem solving capability?

View complete question

Statistics and Probability, Statistics

Category:- Statistics and Probability
Reference No.:- M921572

Have any Question?Write your Review or question?

Related Questions in Statistics and Probability

Question 1private capital expenditure for 12 successive

Question 1 Private capital expenditure for 12 successive quarters are presented in the following table: Quarter Millions 1 31,920 2 25,120 3 30,350 4 24,650 5 30,090 6 23,980 7 28,450 8 26,710 9 31,380 10 27,260 11 3 ...

We toss n coins and each toss shows heads with probability

We toss n coins, and each toss shows heads with probability p, independently of each of the others. Each coin which shows heads is tossed again. What is the distribution function of the number of heads resulting from the ...

Doctoral assistant ships of phd students 50 have paid

Doctoral assistant ships of Ph.D students 50% have paid assistant ships. a random sample of n=200 students is chosen.. based on this sample and using the properties of the binomial distribution, what is the approximate s ...

In a pre-election poll a candidate for district attorney

In a? pre-election poll, a candidate for district attorney receives 253 of 500 votes. Assuming that the people polled represent a random sample of the voting? population, test the claim that a majority of voters support ...

Consider the average home mortgage in new zealand of 283

'"Consider the average home mortgage in New Zealand of $283 000 where the standard deviation of the mortgages is $50 000 and home mortgages are normally distributed. If a home is known to be more than $250 000, what is t ...

A marketing organization claims that 10 of its employees

A marketing organization claims that 10% of its employees are paid minimum wage. If a hypothesis test is performed that fails to reject the null hypothesis, how would this decision be interpreted?

The probability that someone made a purchase at a store is

The probability that someone made a purchase at a store is 0.36. You randomly select 15 people who went to the store. The random variable x represents the number of people who made a purchase. a. Find the probability tha ...

Compounding and period as you increase the length of time

Compounding and Period: As you increase the length of time involved, what happens to future values? What happens to present values? The present value of annuity will increase as well as the future value when you increase ...

Question 1 find the area between -88 standard deviations

Question 1: Find the area between .-88 standard deviations below the mean and 2.35 standard deviations above the mean. '88=.3106 and 2.3=.4906 Both figures are added .3106+.4906= .8012 which is 80.12% Question 2: The are ...

In a sample of 28 cups of coffee at the local coffee shop

In a sample of 28 cups of coffee at the local coffee shop, the average temperature was 162.5 degrees with a standard deviation of 16.7 degrees. What would be the 95% confidence interval for the temperature of your cup of ...

4,153,160 Questions Asked
13,132 Experts
2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Recent Questions

Ask Statistics and Probability Expert