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To test the null hypothesis that the mean waist size for males under 40 years equals 34 inches versus the hypothesis that the mean differs from 34, the following data were collected: 33, 33, 30, 34, 40, 35, 35, 32, 32, 34, 36, 30
1) calculate that sample mean and sample standard deviation?
2) calculate the T-value of the test statistic ?
3) find the p-value?
4) Test the stated hypothesis at a=.05 and write conclusion
You are given the sample mean and the sample standard deviation. Use this information to construct the 90% and 95% confidence intervals for the population mean. Which interval is wider? If convenient, use technology to construct the confidence int..
College students are a major target for advertisements for credit cards. At a university, 65% of students surveyed said they had opened a new credit card account within the past year.
Determine 95% confidence interval evaluate for average number of years served by all Supreme Court justices?
What type of situation would I be able to understand how to use regression as a key driver as an influence in sales or other outcomes?
Assume gasoline prices for a region are normally distributed. Do the data you obtained provide enough evidence to reject the claim?
What is the probability the number of fatal crashes will be between 1000 and 2000 for a year?
The symphony sells raffle tickets each year to raise money. Assume they sell 2000 tickets and the tickets cost $100 each.
Show the sampling distribution of p if a random sample of 150 insured individuals is used to estimate the proportion having received at least one ticket.
Compute the pdf of continuous random variable Z where Z = X + Y and X is a continuous random variable uniformly distributed on [0, 2] and Y is a continuous random variable uniformly distributed on [0, 4]. Assume that X and Y are independent.
The following frequency table lists the sales of an item and the number of times it has occurred. It was obtained from historical records. Sales/Frequency: 10/100, 15/120, 20/300, 25/350, 30/400, 35/500, 40/300, 45/170.
Assume that the underlying population variances are equal. a. Are the two samples paired or independent?
If 64 students were randomly sampled, the probability that the sample mean of the sampled students exceeds 73.5 minutes is approximately 0.
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