QUESTION 1
According to the local union president, the mean gross income of plumbers in the Salt Lake City area follows a normal distribution with a mean of $48,000 and a standard deviation of $2,000. A reacent investigative reporter for KYAK TV found, for a sample of 100 plumbers, the mean gross income was $47,600.
The alternate hypothesis is:
a. µ ≠ $47,600
b. µ = $48,000
c. µ = $47,600
d. µ ≠ $48,000

QUESTION 2
According to the local union president, the mean gross income of plumbers in the Salt Lake City area follows a normal distribution with a mean of $48,000 and a standard deviation of $2,000. A reacent investigative reporter for KYAK TV found, for a sample of 100 plumbers, the mean gross income was $47,600.
What statistic would you select to calculate this?

One Sample Z
One Sample t
One Sample p

QUESTION 3
According to the local union president, the mean gross income of plumbers in the Salt Lake City area follows a normal distribution with a mean of $48,000 and a standard deviation of $2,000. A reacent investigative reporter for KYAK TV found, for a sample of 100 plumbers, the mean gross income was $47,600.
The calculated statistic would be:
-1
-2
1.5
2

QUESTION 4
According to the local union president, the mean gross income of plumbers in the Salt Lake City area follows a normal distribution with a mean of $48,000 and a standard deviation of $2,000. A reacent investigative reporter for KYAK TV found, for a sample of 100 plumbers, the mean gross income was $47,600.
From the calculation of the p value, there is:
evidence that Ho is not true
extremely strong evidence that Ho is not true
very strong evidence that Ho is not true
strong evidence that Ho is not true

QUESTION 5
According to the local union president, the mean gross income of plumbers in the Salt Lake City area follows a normal distribution with a mean of $48,000 and a standard deviation of $2,000. A reacent investigative reporter for KYAK TV found, for a sample of 100 plumbers, the mean gross income was $47,600.
If the sample size was 1000 plumbers and not 100, the pvalue calculation would lead one the believe that there is:
very strong evidence that Ho is not true
extremely strong evidence that Ho is not true.
some evidence that Ho is not true
strong evidence that Ho is not true

QUESTION 6
For a recent year the mean fare to fly from JFK to Bermuda on a discount ticket was $275. A random sample of 12 round top flights on this route show the following:

286 290 285 291 287 275 262 289 274 276 297 262

Can we conclude with strong evidence that the mean fare has increased?
What is the alternative hypothesis?
µ ≥ 275
µ ≤ 275
µ > $275
µ < $275

QUESTION 7
For a recent year the mean fare to fly from JFK to Bermuda on a discount ticket was $275. A random sample of 12 round top flights on this route show the following:
286 290 285 291 287 275 262 289 274 276 297 262
Can we conclude with strong evidence that the mean fare has increased
What statistic would you use?
One samplee Z-statistic because I know the population standard deviation.
One sample t- statistic because I don't know the population standard deviation and I have to calculate the sample standard deviation from the data provided.
One sample t-statistic because I know the population standard deviation
One sample p-statistic because I know the sample standard deviation.

QUESTION 8
For a recent year the mean fare to fly from JFK to Bermuda on a discount ticket was $275. A random sample of 12 round trip flights on this route show the following:
286 290 285 291 287 275 262 289 274 276 297 262
Can we conclude with strong evidence that the mean fare has increased?
This is an example of:
two tailed evaluation.
one tailed evaluation.

QUESTION 9
For a recent year, the mean fare to fly from JFK to Bermuda on a discount ticket was $275. A random sample of 12 round trip flights on this route show the following:
286 290 285 291 287 275 262 289 274 276 297 262
At a level of significance of 0.05, I am trying to determine if the mean fares have increased. I would reject Ho if:
t calc > 1.645
t calc > 1.796
t calc < 1.796
t calc > 1.782

QUESTION 10
The following data is given:
sample size, 36
level of significance, 0.05
two tailed evaluation
sample standard deviation known to be 2.45
I would reject Ho if my calculated statistic is :
less than -2.030
larger than 2.030
larger than 2.030 or less then -2.030

QUESTION 11
For a recent year the mean fare to fly from JFK to Bermuda on a discount ticket was $275. A random sample of 12 round top flights on this route show the following:
286 290 285 291 287 275 262 289 274 276 297 262
At a level of significance of 0.05, we can conclude that:
mean fare can not be evaluated because we do not have a sample standard deviation.
mean fare has remained the same
mean fare has not increased as the t calculated = 1.89, which exceeds the t critical value.
mean fare has increased as the t calculated = 1.89, which exceeds the t critical value.

QUESTION 1 According to the local union president, the mean gross...