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interest rate

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Question

Tanja wants to establish an account that will supplement her retirement income beginning 20years from now.

Find the lump sum she must deposit today so that $200 comma 200,000

will be available at time of retirement, if the interest rate is 8%,

compounded quarterly.

 
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In a public opinion poll, approximately 85%

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Question

3)  In a public opinion poll, approximately 85% of Americans felt that

having a police officer on patrol in the neighborhood made them safer than having no police officer on patrol. The margin of error reported was 3%. Construct an interval estimate using these figures.

Answer  

4)  

For each of the following confidence levels, look up the critical z values for a two-tailed test.  

4a)  90% (Hint: 5% in each tail): 

Work: 

4b)  95%  (Hint: 2.5% in each tail):

Work:  

5)

Remembering that a meta-analysis calculates one mean effect size using the effect sizes of several studies, assume you are conducting a meta-analysis over a set of five studies. The effect sizes for each study are: d= .65, d = .19, d = .42, d = .08, d = .70

5a)  Calculate the mean effect size of these studies. 

5b)  Use Cohen’s conventions to describe the mean effect size you calculated in part (a).        

 
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Suppose that $150,000 is owed on a house after the down payment is made

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Question

Suppose that $150,000 is owed on a house after the down payment is made.The monthly payment for principal

and interest at 7.0%for 30 years

is 150times•6.65302=$997.95

 
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At the beginning of a 31-day billing period,

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Question

At the beginning of a 31-day billing period, Sandra Lazzaro has an unpaid balance of $780 on her credit card.

Three days before the end of the billing period, she pays $300. Find her finance charge at 1.2% per month using the average daily balance method. 

I don’t know the equation to solve this. 

 
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