please help if you can 1 Why is the standard error of the mean used for the t test and not the standard deviation because information about the population is known and using the SD might create a unbiased result because information about the population is not known and using the SD might create a biased result because information about the sample is not known and using the SEM might create a biased result because information about the sample is not known and using the SD might create a unbiased result 2 What does the value of t represent gives us a measure of the magnitude of the mean differences gives us a measure of variance gives us a measure of range 3 A meteorologist wants to know how the current year's amount of snowfall has compared to previous years' average snowfalls The average snowfall is 2inches per year with a standard error of the mean of 1 inch, and this year's current snowfall was 2 Compute the one sample t test using these data Please answer using whole numbers only 4 What is the critical value of a two tailed t test with a degree of freedom of df 15 and using an alpha level of 01 Fill in the blank with the probability rounded to the nearest hundredth (ex 5 24)

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please help if you can 1. Why is the standard error of the mean used for the t -test and not the standard deviation? because

please help if you can

1. Why is the standard error of the mean used for the t-test and not the standard deviation?

because information about the population is known and using the SD might create a unbiased result
because information about the population is not known and using the SD might create a biased result
because information about the sample is not known and using the SEM might create a biased result
because information about the sample is not known and using the SD might create a unbiased result

2. What does the value of t represent?

gives us a measure of the magnitude of the mean differences
gives us a measure of variance
gives us a measure of range

3. A meteorologist wants to know how the current year's amount of snowfall has compared to previous years' average snowfalls. The average snowfall is 2inches per year with a standard error of the mean of 1 inch, and this year's current snowfall was 2. Compute the one-samplet-test using these data. Please answer using whole numbers only.

4. What is the critical value of a two-tailed t-test with a degree of freedom of df=15 and using an alpha level of .01. Fill in the blank with the probability rounded to the nearest hundredth (ex: 5.24).