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Below are the lifetimes, in hours, of fifty 40-watt, 110-volt internally frosted incandescent lamps, taken from forced life tests:
919
1196
785
1126
936
918
1156
920
948
1067
1092
1162
1170
929
950
905
972
1035
1045
855
1195
1340
1122
938
970
1237
956
1102
1157
978
832
1009
1151
765
958
902
1022
1333
811
1217
1085
896
1311
1037
702
923
Construct a box plot for these data.
Test the claim that the mean body mass index (BMI) of men is equal to the mean BMI of women. Use the data to the right to test this claim.
Surgical Intensive Care Unit would like to be better prepared by predicting number of surgical patients they must expect. Forecast for day 16 by using 3-period Moving Average?
Suppose you have a set of blood pressures with a mean of 80 diastolic and standard deviation of 5 points. assuming a normal distributions of blood pressures, what two values should 95% of all blood pressures lie? show work.
There is 0.75 probability that you will get promotion or raise. Probability of getting promotion and raise is 0.50. Determine the probability to receive a raise.
In 1978, the CPI for Canada was 43.6, but in 1988, the CPI was 84.8. What was the geometric mean annual increase for the period?
The mean monthly rent for a random sample of 10 apartments advertised in the local newspaper is $640. Assume that the standard deviation is $90. find a 95% confidence interval for the mean monthly rent for unfurnished one-bedroom apartments ..
This question is asking for speculation about the possible results of a study if we change the size of the population. It all depends on unknowns such as how representative the 100 adults are of the population.
Plan the scatter diagram
Twelve cases of leukemia are reported in people living in a particular census tract over a 5-year period. Is this number of cases abnormal if only 6.7 cases would be expected based on national cancer-incidence rates?
Calculate the probability that a hand of 13 cards dealt from a normal pack of 52 contains exactly two kings and one ace. what is the probability that it contains exactly one ace given that it contains exactly two kings.
An economist found that a random sample of 42 high school teachers had an average annual salary of $56,490. A previous study showed that the population standard deviation is $4150. Find the 99% confidence interval for µ, the average annual salary ..
Looking at the data, you suspect that the manufacturer is incorrect in its label claim. You want to perform hypothesis testing to prove or disprove it.
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