Eddies Quiz

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Eddie's Statistics Challenge

Test your knowledge of statistical concepts with Eddie's Quiz! This 9-question multiple choice quiz is designed to assess your understanding of essential statistical principles including confidence intervals, sampling distributions, and hypothesis testing.

Whether you're a student looking to reinforce your learning or a professional brushing up on your skills, this quiz is perfect for you.

9 Engaging Questions
Multiple Choice Format
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9 Questions2 MinutesCreated by CalculatingCat27

A sample of 37 AA batteries had a mean lifetime of 584 hours. A 95% confidence interval for the population mean was 579.2< u < 588.8. Which statement is the correct interpretation of the results?

None of these statements correctly interpret the results.

We are 95% confident that the mean lifetime if all the bulbs in the population is between 579.2 and 588.8 hours

95% of the light bulbs in the sample had lifetimes between 579.2 hours and 588.8 hours.

The probability that the population mean is between 579.2 hours and 588.8 hours is 0.95.

If the expected value of the sample statistic is equal to the population being estimated, the sample statistic is said to

Have high precision.

Have low variability

Be an unbiased estimator of the population parameter.

Be a random estimator of the population parameter

The population parameter value and the point estimate differ because a sample is not a census of the entire population, but it is being used to develop the

Population parameter

Point estimate

Standard error

Population mean

The CEO of a company wants to estimate the percent of employees that use company computers to go on Facebook during work hours with 95% confidence. He selects a random sample of 150 employees and find that 53 of them logged onto Facebook that day. What is the point estimate of the proportion of the population that logged onto Facebook that day?

0.35

0.25

0.65

0.53

A random sample selected from an infinite population is a sample selected such that each selected comes from the same _______ and each element is selected _______.

Population; simultaneously

Population; independently

Sample; independently

Sample; simultaneously

The random numbers generated using Excel's RAND function follows a _____ probability distribution between 0 and 1.

Binomial

Normal

Uniform

Random

Which statement is not true?

Type 2 error can occur for both one and two-tailed tests

The probability of making a type 1 error is symbolized by 'a'

Failing to reject the null hypothesis when it is false is a Type 1 error

Rejecting the null hypothesis when it is true is a Type 1 error

For population with an unknown distribution, the form of the sampling distribution of the sample mean is

Exactly normal for large sample sizes

Approximately normal for larger sample sizes

Approximately normal for small sample sizes

Exactly normal for small sample sizes

A null an alternative hypothesis for a one proportion z test are given as Ho: p=0.8, Ha: p<0.8. This hypothesis test is

Lower-tailed

Two-tailed

Upper-tailed

These hypotheses are incorrectly stated

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