A potato chip manufacturer has found that in the past the standard deviation of bag weight has been 0.2 ounce. They want to test whether the standard deviation has changed. The null hypothesis is:
A) H0 : 2 = 0.2
B) H0 : = 0.2
C) H0 : = 0.04
D) H0 : 2 = 0.04
Q. 2The size of the standard error of the sample proportion is dependent on the value of the population proportion and the closer the population proportion is to .50, the larger the standard error for a given sample size will be.
Indicate whether the statement is true or false
Q. 3A histogram is most commonly used to analyze which of the following?
A) Nominal level data
B) Quantitative data
C) Time-series data
D) Ordinal data
Q. 4Three events occur with probabilities P(E1 ) = 0.35, P(E2 ) = 0.15, P(E3 ) = 0.40. If the event B occurs, the probability becomes P(E1B) = 0.25, P(B) = 0.30. Compute P(E1 or B).
A) 0.575
B) 0.075
C) 0.021
D) 0.475
Q. 5Suppose it is known that 93 percent of all parts in an inventory of 18,900 parts are in workable order.
If a sample of n = 100 parts were selected from the inventory, based on the concept of sampling distributions of proportions, it can be assumed that the sample proportion of workable parts will also be 0.93. Indicate whether the statement is true or false
Q. 6At issue is the proportion of people in a particular county who do not have health care insurance coverage. A simple random sample of 240 people was asked if they have insurance coverage, and 66 replied that they did not have coverage.
Based on these sample data, determine the 95 confidence interval estimate for the population proportion.A) (0.239, 0.321 )
B) (0.259, 0.301 )
C) (0.224, 0.336 )
D) (0.268, 0.292 )
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