Question

does anyone know how to calculate the standard error? statistics homework

Answer 1

b) Use the information below to conduct a z-test using p=.05 as your alpha level. Make sure you complete all 5 steps and show your work/answers for each step.

Sample Population

Mean = 3.13 Mean = 3.02

SD = 0.53 SD = 0.54

n = 86

Answer 2

I have no idea what I am doing

Answer 3

Are these two samples?

Answer 4

yes one is samplee and one is population its supposed to be on the other side

Answer 5

the standard error of the mean is calculated as sample standard deviation divided by the square root of the sample size:\[\frac{ s }{ \sqrt{n} }\]

Answer 6

The "5 steps" are some reference to steps in your class or text, and can vary from class to class or author to author. so it's hard to fully answer "conduct a z-test"

Answer 7

Typically you would set-up hypotheses (step 1)

Null hypothesis H0: mean = 3.02
versus
Alternativ hypothesis H1: mean does not equal 3.02

Answer 8

Step 2: calculate test statistic\[z=\frac{ 3.13-3.02 }{ 0.53/\sqrt{86} }=1.936\]

Answer 9

Step 3: compare that z-value to a table or use a calculator to calculate a p=value

p = .0528833487

Answer 10

Step 4: Make a decision to reject/fail to reject null hypothesis

Since the calculated p=value is greater than .05 we fail to reject the null hypothesis

Answer 11

Step 5: Draw statistical conclusion

We are unable to conclude based o this sample that the population mean is other than 3.02

Answer 12

Does any of this sound familiar from class?

Answer 13

Step 1) State the hypothesis
Population 1: individuals who are attending college
Population 2: individuals in general (that is, people who are not attending college)
Null Hypothesis: Individuals attending college have the same cooperation as individuals in general μ1 = μ2
Alternative (research) Hypothesis: When measured on their cooperation with police, individuals who are attending college (population1) score differently from individuals in general (population 2) μ1 > μ2


Step 2) Calculate the standard error
Step 3) Determine critical value
Step 4) Conduct hypothesis test
Step 5) Make a decision about rejecting/failing to reject the hypothesis

Answer 14

around there yes