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Make a Pareto diagram and give conclusions.
The following data represent complaints about hotel rooms:
Reason
Number
Room dirty
32
Room not stocked
17
Room not ready
12
Room too noisy
10
Room needs maintenance
Room has too few beds
9
Room doesn't have promised features
7
No special accommodations
2
a. Construct a pareto diagram.
b. What reasons for complaints do you think the hotel should focus on if it wants to reduce the number of complaints? Describe.
Using the probabilities above what is the expected size of family you draw?
Using the 0.01 significance level, can we conclude that there is a positive correlation between the variables?
At the 0.05 significance level, can he conclude that number of absences has declined? calculate approximately the p -value.
Perform a hypothesis test by using.04 level of significance to find out if there is a difference between the population means.
If we fit the least-squares line to the 12 data points (one for each month) we obtain the following results from a software package. Notice that temperature is taken as the explanatory variable and crawling age as the response.
Given 7 male individuals in a Physical Education course, the number of sit ups each individual can do in a one minute period was recorded:
To find out the proportion of the population of likely voters who agree the statement. Could we say among appropriate statistical certainty which the proportion of the population of likely voters.
A sample of n observations is taken from a population. When performing statistical inference about a population variance, the appropriate chi-square distribution has:
Obtain a test statistic and p -value assuming equal variances. Interpret these results.
A sample of 50 male and 50 female infants were put on an experimental infant formula. After two weeks the parents of each infant were asked to fill out a questionnaire concerning infant satisfaction on the formula. One of the questions was "Did Ba..
We are interested in testing to find out whether the variance of the population is vitally more than 0.003
Since she is allowed to reserve one time if her first serve is out what should her serving strategy be?
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