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i. In an experiment, people are told to solve a problem by focusing on the details. Is the speed of solving the problem different for people who get such instructions compared to the speed for people who are given no special instructions?
ii. Based on anthropological reports in which the status of women is scored on a 10-point scale, the mean and standard deviation across many cultures are known.A new culture is found in which there is an unusual family arrangement. The status of women is also rated in this culture. Do cultures with the unusual family arrangement provide higher status to women than cultures in general?
iii. Do people who live in big cities develop more stress-related conditions than people in general?
Based on the information given for each of the following studies, decide whether to reject the null hypothesis. For each, give (a) the Z-score cutoff (or cutoffs) on the comparison distribution at which the null hypothesis should be rejected, (b) the Z score on the comparison distribution for the sample score, and (c) your conclusion. Assume that all populations are normally distributed.
Suppose you had flipped a fair coin 19 times and "tails" had come up each time. The probability of now tossing a "head" on the 20th flip would then be:
If 28% of the residents play poker and garden and 70% of the residents play both shuffleboard and poker, then find the probability that a resident plays poker, given that they garden.
The best measure of central tendency for this scenario would be to use median as it is not affected by extremely large values.
Provide a 95% confidence interval for the difference between the two population means. Compare the means of population 1 and population 2. Are they equal? Show your test procedure.
What must be checked in order to compare two population means when you do not know the values of the population standard deviation? Which one?
Round the intermediate values to 2 decimal places. Round your answer to 2 decimal places, the tolerance is +/-0.05. Type of music preferred is independent or not independent of region of the country?
Based on these data, explain whether or not course attendance had any effect on determining of a restaurants violation of health code.
The mean is a useful measure, but it can be misleading. Describe a circumstance when the mean is very useful as the average and a circumstance when the mean is very misleading as the average.
What is the probability that next week's show will: Have between 30 and 37 million viewers? (Round z-score computation to 2 decimal places and your final answer to 4 decimal places.
As part of its testing program, LongLast tests a sample of 25 batteries. What is the standard error of the mean?
Manufacturer of mole and gopher poison has experienced the following monthly demand for an environmentally sound pesticide poison. Using a Average method, what would the forecast have been for July?
Among 200 randomly selected dvd of this type suppose u have to find the probability x is less than 8 which distribution does this have?
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