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A study to see how well marital dissolution was predicted by the personality scores of husbands and wives was published in the Journal of Personality and Social Psychology. A random selection of 286 newlywed couples was made. After 5 years, 222 couples remained together and 64 had dissolved their marriages. The mean age of the husband in the 222 stable marriages was 30.47, and the standard deviation was 7.65. For the 64 unstable couples, the mean age of the husband was 29.64, and the standard deviation was 6.83. Test the hypothesis at the .01 level that there's no difference in the the population mean age of the husband in the two types of couples.
Choose any Statistic business problem and develop a problem statement which can be addressed with survey research. Prepare a 10-13 question survey to collect primary data regarding your selected problem statement.
A university club consists of 4 men and 6 women. Two members are chosen at random without replacement. Let X = 0 if first person chosen is male, 1 if first person chosen is female. Y = 0 if second person chosen is male, 1 if second person chosen i..
When studying simultaneous responses to two categorical questions, we should set up a a) contingency table. b) frequency distribution.
An airline estimates that 90% of people booked on their flights actually show up. If the airline books 71 people on a flight for which the maximum number is 69, what is the probability that the number of people who show up will exceed the capacity..
The data results are based on serum continine levels for each group. The claim is that exposure to tobacco smoke (as second-hand smoke) corresponds to higher levels of cotinine.
A random sample of 16 students selected from the student body of a large university had an average age of 25 years and a standard deviation of 2 years.
ABC Convenient stores uses fixed-time period model to determine order quantity for their popular chewing gum (Supergum). Daily demand for Supergum is 100 units with a standard deviation of 25 units.
Let the random variable X denote the number of emergency calls received by the campus police office each day. The probability mass function of X is given by:
Perform a linear regression, 8 month moving average & 3 month moving average forecasting technique to see which is most accurate for the new quarter 11 if quarter 11 sales are 172,000 units
Evaluate probability values using normal distribution and How many students earned more than $36,000? _______
Develop a linear regression model for these data and forecast carpet sales if 30 construction permits for new homes are filed.
The normal distribution has several characteristics that make it the underlying foundation of much of inferential statistical tools.
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