Statistics Trivia

Front

The number of points scored in an NBA season for a team has the following statistics: Games played is 82, mean = 99.6, mode = 104, and median = 102. How would you describe a graph of this data?

Back

Left skewed

Front

We always test a null hypothesis against an alternative

Back

true

Front

What hypothesis states equality or no difference, or no relationship/effect?

Back

Null hypothesis

Front

Which of the following is not one of the steps for hypothesis testing? Calculating the test statistics with the summary sample statistics, Choosing a cutoff value from your population to determine how close sample is to the population value, Drawing a conclusion based on the results of your test, Deciding whether to reject or fail to reject the null hypothesis

Back

Choosing a cutoff value from your population to determine how close sample is to the population value

Front

If our sample value is close to the null/population value, we conclude that

Back

nothing happened in the study; there is no effect

Front

A level of significance of 5% means

Back

there’s a 5% a chance we’ll be wrong if we reject the null hyphotesis

Front

Identify the correct null hypothesis: Is the proportion of babies born male different from 50%? In a sample of 200 babies, 96 were male. Test the claim using a level of significance of 1%. Options: Ho: p = 0.50, Ho: p = 0.48, Ho: µ = 100, Ho: µ = 96

Back

Ho: p = 0.50

Front

We conclude “fail to reject Ho”, what could we use as our interpretation? Is the proportion of babies born male different from 50%? In a sample of 200 babies, 96 were male. Test the claim using a level of significance of 1%.

Back

There is not enough evidence to say that the proportion of babies born male is different from 0,50.

Front

What does it mean to say a test is two-tailed?

Back

There is no predicted direction for the alternative hypothesis.

Front

A car manufacturer advertises that its new subcompact models get 47 mpg. If µ is the mileage of these cars, what could be the null and alternate hypothesis if we wanted to check if the car’s mpg is overrated?

Back

Ho: µ = 47 Ha: µ > 47