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1. Seeds. Information on a packet of seeds claims that the germination rate is 92%. What's the probability that more than 95% of the 160 seeds in the packet will germinate? Be sure to discuss your assumptions and check the conditions that support your model.
2. Apples. When a truckload of apples arrives at a packing plant, a random sample of 150 is selected and examined for bruises, discoloration, and other defects. The whole truckload will be rejected if more than 5% of the sample is unsatisfactory. Suppose that in fact 8% of the apples on the truck do not meet the desired standard. What's the probability that the shipment will be accepted anyway?
An appliance manufacturer claims to have developed a new toaster oven that consumes an average of no more than 250 W. From previous studies, it is believed that power consumption for toaster ovens is normally distributed with a variance of 324 W.
Find the critical t alpha/2 assuming the population is normally distributed, the confidence level is 95%, n=101 and sigma is unknown.
Discuss how to perform a test of hypothesis to determine whether the variances of two populations are equal. Include a discusssion of why the larger sample variance is placed in the numerator in the Test Statistic for comparing two variances.
The manager of the greeting card section of Mazey's department store is considering her order for a particular line of Christmas Cards. Develop the payoff table for this decision situations.
two random variables x and y have the joint distribution p0 0 0.2 p0 2 0.3 p1 1 0.1 p2 0 0.3 p 2 2 0.1 and px y 0
Detremine the mean, standard deviation, and variance for this frequency distribution.
you make five measurements of a particular wavelength and you find you have some random noise. your measurements are
The Z-score cutoff (or cutoffs) on the comparison distribution at which the null hypothesis should be rejected.
Suppose that the four inspectors at a film factory are supposed to stamp the expiration date on each package of film at the end of the assembly line. John, who stamps 20% of the package, fails to stamp the expiration date once in every 200 package.
what is the area under the normal curve between z -1.0 and z
1 draw the scatter plot for the variables.2 compute the correlation coefficient. use three decimal places.3 find the
The manufacturer of a coffee dispensing machine claims the ounces per cup is normally distributed with population mean equal to 8 ounces and standard deviation equal to 0.9 ounces. If 50 cups of coffee were measured, what is the probability that.
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