Unlock document.
This document is partially blurred.
Unlock all pages and 1 million more documents.
Get Access
A meteorologist stated that the average temperature during July in Chattanooga was 80
degrees. A sample of 32 Julys was taken. The correct set of hypotheses is
a. H0: 80 Ha: 80
b. H0: 80 Ha: > 80
c. H0: 80 Ha: 80
d. None of the other answers are correct.
Exhibit 5-9
Forty percent of all registered voters in a national election are female. A random sample
of 5 voters is selected.
Refer to Exhibit 5-9. The probability that there are no females in the sample is
a. 0.0778
b. 0.7780
c. 0.5000
d. 0.3456
General Hospital has noted that they admit an average of 8 patients per hour.
a. Define the random variable in words for this experiment.
b. What is the probability that during the next hour fewer than 3 patients will be
admitted?
c. What is the probability that during the next two hours exactly 8 patients will be
admitted?
Compute the hypergeometric probabilities for the following values of n and x. Assume
N 8 and r 5.
a. n 5, x 2
b. n 6, x 4
c. n 3, x 0
d. n 3, x 3
Exhibit 14-4
The following information regarding a dependent variable (Y) and an independent
variable (X) is provided.
SSE = 6
SST = 16
Refer to Exhibit 14-4. The MSE is
a. 1
b. 2
c. 3
d. 4
For a population with an unknown distribution, the form of the sampling distribution of
the sample mean is
a. approximately normal for all sample sizes
b. exactly normal for large sample sizes
c. exactly normal for all sample sizes
d. approximately normal for large sample sizes
Exhibit 10-8
In order to determine whether or not there is a significant difference between the hourly
wages of two companies, the following data have been accumulated.
Refer to Exhibit 10-8. A point estimate for the difference between the two sample
means is
a. 20
b. 0.50
c. 0.25
d. 1.00
Regression analysis was applied between sales (in $1000) and advertising (in $100) and
the following regression function was obtained.
500 + 4x
Based on the above estimated regression line if advertising is $10,000, the point
estimate for sales (in dollars) is
a. $900
b. $900,000
c. $40,500
d. $505,000
Exhibit 13-7
The following is part of an ANOVA table, which was the results of three treatments and
a total of 15 observations.
Refer to Exhibit 13-7. The number of degrees of freedom corresponding to within
treatments is
a. 12
b. 2
c. 3
d. 15
A regression analysis involved 6 independent variables and 27 observations. The critical
value of t for testing the significance of each of the independent variable's coefficients
will have
a. 27 degrees of freedom
b. 26 degrees of freedom
c. 21 degrees of freedom
d. 20 degrees of freedom
The symbol
is used to represent the
a. variance of the population
b. standard deviation of the sample
c. standard deviation of the population
d. None of the other answers are correct.
The assembly time for a product is uniformly distributed between 6 to 10 minutes. The
probability of assembling the product between 7 to 9 minutes is
a. zero
b. 0.50
c. 0.20
d. 1
Serial correlation is
a. the correlation between serial numbers of products
b. the same as autocorrelation
c. the same as leverage
d. None of these alternatives is correct.
Excel's BINOM.DIST function can be used to compute
a. bin width for histograms
b. binomial probabilities
c. cumulative binomial probabilities
d. both binomial probabilities and cumulative binomial probabilities are correct.
The following frequency distribution shows the ACT scores of a sample of students:
For the above data, compute the following.
