BNAL 206 ASSIGNMENT #4 QUESTIONS AND
VERIFIED ANSWERS
A ________ is a description of the approach that is used to obtain samples from a
population prior to any data collection activity. - Answers - sampling plan
________ states that if the sample size is large enough, the sampling distribution of the
mean is approximately normally distributed, regardless of the distribution of the
population and that the mean of the sampling distribution will be the same as that of the
population. - Answers - Central limit theorem
A ________ is a range of values between which the value of the population parameter
is believed to be, along with a probability that the interval correctly estimates the true
population parameter. - Answers - confidence interval
Which of the following propositions describes an existing theory or belief? - Answers -
null hypothesis
Which of the following is the initial step in conducting a hypothesis test? - Answers -
identifying the population parameter of interest
For a one-tailed test, the critical value: - Answers - helps determine if the test statistic
falls in the rejection region or not
Which of the following is true about the rejection region? - Answers - The rejection
region occurs in the tails of the sampling distribution of the test statistic.
The amount of water in a two-liter bottle is approximately normally distributed with a
mean of 2.05 liters with a standard deviation of 0.025 liter. What is the probability that
an individual bottle contains less than 2.03 liters? - Answers - 0.2119
The amount of water in a two-liter bottle is approximately normally distributed with a
mean of 2.05 liters with a standard deviation of 0.025 liter. If a sample of 4 bottles is
selected, what is the probability that the sample mean amount contained is less than
2.03 liters? - Answers - 0.0548
According to a report by App Annie, a business intelligence company that produces
tools and reports for the apps and digital goods industry, smartphone owners a reusing
an average of 30 apps per month. Assume that number of apps used per month by
smartphone owner is normally distributed and that the standard deviation is 5. If you
VERIFIED ANSWERS
A ________ is a description of the approach that is used to obtain samples from a
population prior to any data collection activity. - Answers - sampling plan
________ states that if the sample size is large enough, the sampling distribution of the
mean is approximately normally distributed, regardless of the distribution of the
population and that the mean of the sampling distribution will be the same as that of the
population. - Answers - Central limit theorem
A ________ is a range of values between which the value of the population parameter
is believed to be, along with a probability that the interval correctly estimates the true
population parameter. - Answers - confidence interval
Which of the following propositions describes an existing theory or belief? - Answers -
null hypothesis
Which of the following is the initial step in conducting a hypothesis test? - Answers -
identifying the population parameter of interest
For a one-tailed test, the critical value: - Answers - helps determine if the test statistic
falls in the rejection region or not
Which of the following is true about the rejection region? - Answers - The rejection
region occurs in the tails of the sampling distribution of the test statistic.
The amount of water in a two-liter bottle is approximately normally distributed with a
mean of 2.05 liters with a standard deviation of 0.025 liter. What is the probability that
an individual bottle contains less than 2.03 liters? - Answers - 0.2119
The amount of water in a two-liter bottle is approximately normally distributed with a
mean of 2.05 liters with a standard deviation of 0.025 liter. If a sample of 4 bottles is
selected, what is the probability that the sample mean amount contained is less than
2.03 liters? - Answers - 0.0548
According to a report by App Annie, a business intelligence company that produces
tools and reports for the apps and digital goods industry, smartphone owners a reusing
an average of 30 apps per month. Assume that number of apps used per month by
smartphone owner is normally distributed and that the standard deviation is 5. If you
