Each week American Stores receives a shipment from a supplier. The contract specifies that the maximum allowable percent defective is 5 percent. When the shipment arrives, a sample of 20 parts is randomly selected.
If 2 or more of the sampled parts are defective, the shipment is rejected and returned to the supplier. Assume that a shipment arrives that actually has 4 percent defective parts and the distribution of defective parts is described by a binomial distribution. The probability that the shipment is rejected is approximately 0.19. Indicate whether the statement is true or false
Q. 2The director of the city Park and Recreation Department claims that the mean distance people travel to the city's greenbelt is more than 5.0 miles.
Assume that the population standard deviation is known to be 1.2 miles and the significance level to be used to test the hypothesis is 0.05 when a sample size of n = 64 people are surveyed. Given this information, if the sample mean is 15.90 miles, the null hypothesis should be rejected.
Indicate whether the statement is true or false
Q. 3Why should a histogram contain no gaps between the bars but a bar chart may have gaps?
What will be an ideal response?
Q. 4Explain why it is appropriate to connect the points on a line graph, but the points on a scatter plot should not be connected.
What will be an ideal response?
Q. 5One of the characteristics of the binomial distribution is that the probability of success for each trial depends on whether the previous trial was a success or not.
Indicate whether the statement is true or false
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