Homework 2
Due May 18 at 11:59pm
Points 19
Questions 19
Time Limit None
Allowed Attempts 3
Available May 12 at 12am - May 18 at 11:59pm 7 days
Instructions
This assignment consists of 19 questions. Please answer every question prior to submitting your ass

Practice:
Question
Sampling error is the difference between the statistic and the _.
Population proportion
Parameter
Population standard deviation
None of the above
Question
Which is not a continuous random variable?
Length of an ECO 250 lecture
Wingspan

1. The average weight of the entire batch of the boxes of cereal filled today was 20.15
ounces. A random sample of four boxes was selected with the following weights: 20.05,
20.56, 20.72, and 20.43. The sampling error for this sample is _. -0.29
2. A repo

1
Question 1
A _ sample is a sample in which each member of the population has a known, nonzero,
chance of being selected for the sample.
probability
systematic
simple random
convenience
Question 2
In _ sampling, we divide the population into mutually exc

Question 3
The time required to verify and fill a common prescription at a neighborhood pharmacy is normally
distributed with a mean of 10 minutes and a standard deviation of 3 minutes.
Determine the wait time for which 80% of all prescriptions will be ve

Data: values assigned to observations or measurements
Information: data that are transformed into useful facts that can be used for specific purpose,
such as making decisions
Data: raw facts or measurements of interest
Each value is considered a data poi

Homework business statistics
1. Which of the following is an example of discrete data?
The number of customers a restaurant serves each day in a given week.
The temperature taken at noon on every day during the month of January.
The times for a set of

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Practice1
A random sample of 60 teenagers revealed that teenagers received an average 2,272 text messages per month.
Using this sample, what is the standard error of the mean assuming the population standard deviation is 953 text
messages per month?
123.0

Question 1
C
Question 2
0
Question 3
1
Question 4
0.9406
P ( Z 1.56 ) =0.9406[ standard normal table ]
Question 5
0.648
P ( Z >0.38 )=0.648 [ standard normal table]
Question 6
0.7047
zscore=
x 140126
=
=0.538
26
P ( Z 0.538 ) =0.7047[ standard normal tabl

Question 3
A _ is defined as the probability that the interval estimate will include the population
parameter of interest, such as a mean.
Answer: Confidence interval
margin of error
confidence level
significance level
confidence interval
Question 4
A ran

1
Question 1
The purpose of generating a confidence interval for the mean is to provide an estimate for the
value of the population mean.
Answer: True
True
False
Question 2
When calculating a confidence interval for the mean using a sample size of 30 or m

Score for this attempt: 10 out of 10
Submitted May 16 at 1:45pm
This attempt took 3 minutes.
Question 1
1 / 1 pts
What type of data is the following variable.
The average mass (in grams) of a sample of rocks collected in the waters of a region.
Correct!
R