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300 randomly selected television viewers were questioned on the main reason they watched particular programs. The results are given below.
"Relieve Boredom" "Get some Laughs" "Learn Something" Total
Male 65 70 25 160
Female 45 50 45 140
Total 110 120 70 300
a. State the null and alternative hypotheses for a contingency table test for independence of gender.
b. State the decision rule, using a .05 level of significance.
c. Calculate the χ2 test statistic for this data.
d. Give your conclusion for this test.
A certain type of digital camera comes in either a 3-megapixel version or a 4-megapixel version. A camera store has received a shipment of 18 of these cameras, of which 7 have 3-megapixel resolution. Calculate the standard deviation of X
a person has applied for positions at company a company b and company c. the probability of obtaining an offer from
Explain the importance and impact of the Fishing Industry. Discuss problems and issues surrounding the Fishing Industry today.
you wish to conduct an anova one wayomnibus in your capstone project. in order to insure you have enough power to
To qualify for security officers training, recruits are tested for stress tolerance. The scores are normally distributed with a mean of 62 and a standard deviation of 8. If only the top 15% of recruits are selected, find the cut-off score. What is..
Assume that sigma = 60, choose an alpha level, and perform a hypothesis test to determine whether this is good evidence to conclude that the mean score for all young men is less than 275.
Assume that the joint probability density function of X and Y is given by? Find the marginal probability density function of X.
A departmental store that wishes to examine whether it is losing or gaining customers draws a sample from its list of credit cardholders by selecting every tenth name.
Use the normal approximation to the binomial distribution to estimate the probability that the number of heads is greater than or equal to 60.
What are the mean and standard deviation of the amount he might spend in two consecutive days?- What assumption did you make in order to find that standard deviation? Are there any reasons you might question that assumption?
An actuator for a disk drive uses a shock mount to absorb vibrational energy at approximately 60 Hz [14]. The Bode diagram of Gc(s)G(s) of the control system is shown in Figure E9.18. (a)
Compute the two forecasts by using MAPD and indicate which seems to be more accurate.
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