Hickman Student t vs normal distribution

1.

Multiple Choice

1 min

1 pt

What is not known in t distribution?

population mean

population standard deviation

sample mean

sample size

2.

Multiple Choice

1 min

1 pt

What should the sample size be to use z distribution if you know the data is normally distributed?

greater than 30

less than 30

greater than or equal to 30

any number

3.

Multiple Choice

1 min

1 pt

What should the sample size be to use t distribution?

greater than 30

less than 30

greater than or equal to 30

less than or equal to 30

4.

Multiple Choice

1 min

1 pt

What should the sample size be to use z distribution?

greater than 30

less than 30

greater than or equal to 30

less than or equal to 30

5.

Multiple Choice

1 min

1 pt

What should the sample size be to use z distribution if you know that the data is normally distributed?

greater than 30

less than 30

greater than or equal to 30

any number

6.

Multiple Choice

1 min

1 pt

You know the population SD and the sample mean, and you know the data is normally distributed, you should use_____________ build a confidence interval for the population mean, if your sample size is 12

t distribution

z distribution

either distribution

none of these

7.

Multiple Choice

1 min

1 pt

You know the population SD and the sample mean, you should use_____________ build a confidence interval for the population mean, if your sample size is 12

t distribution

z distribution

either distribution

none of these

8.

Multiple Choice

1 min

1 pt

You know the population SD and the sample mean, you should use_____________ build a confidence interval for the population mean, if your sample size is 32

t distribution

z distribution

either distribution

none of these

9.

Multiple Choice

1 min

1 pt

What should the sample size be to use t distribution if you know the data is normally distributed?

greater than 30

less than 30

greater than or equal to 30

any number

10.

Multiple Choice

1 min

1 pt

You know the sample SD and the sample mean, you should use_____________ build a confidence interval for the population mean, if your sample size is 12

t distribution

z distribution

either distribution

none of these

11.

Multiple Choice

1 min

1 pt

You know the sample SD and the sample mean, and you know the data is normally distributed, you should use_____________ build a confidence interval for the population mean, if your sample size is 12

t distribution

z distribution

either distribution

none of these

12.

Multiple Choice

1 min

1 pt

When will the bell curves for t and z distribution look the same?

the smaller the sample size

the larger the sample size

when the sample sizes are the same

when the sample size is one

13.

Multiple Choice

1 min

1 pt

You are building a confidence interval, n is 32, your sample SD is 10, and you want to build a 95% confidence interval, then which of the statements is true

CV = 1.96 E =3.465

CV = 2.262 E = 3.999

CV = 2.228 E =3.939

none of these

14.

Multiple Choice

1 min

1 pt

You are building a confidence interval, n is 32, your population SD is 10, and you want to build a 95% confidence interval, then which of the statements is true

CV = 1.96 E =3.465

CV = 2.262 E = 3.999

CV = 2.228 E =3.939

none of these

15.

Multiple Choice

1 min

1 pt

You are using t distribution to build a confidence interval and you want to know when you need to use the graphing calculator versus when you need to use the chart? Which of the following cannot be found using the t chart that you were given in class?

n = 12, CL =90%

n = 12, CL = 80%

n = 60, CL = 90%

n= 71, CL = 98%

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