one sample mean

The average price for different configurations of laptops in a shop is $1,300. Assume the standard deviation is $300. If a random sample of 9 laptops is selected, then find the probability that the mean of the sample will be less than $1,000. => 0.1..

A population consists of the five numbers 1, 3, 5, 7 and 9. Consider all the samples of size 2 that can be drawn without replacement from the population. Find the mean and the variance of the sampling distribution means. => 6 and 4.05 or 6 and 3 or ..

A retail garment shop receives a shipment of trousers, with a standard length of 49.0 in. and a standard deviation of 1.0 inch. A random sample of 32 trousers had a mean length of 48.8 in. Which of the following statements is true? => The sample mean..

A retail garment shop receives a shipment of trousers, with a standard length of 49.0 in. and a standard deviation of 1.0 inch. A random sample of 32 trousers had a mean length of 48.8 in. Find the 95% confidence interval. => The interval between 48.65 and 49.35 or The..

In 2002 Football World Cup finals tournament a total of 64 matches were played and an average of 2.52 goals were scored per match. Assume the standard deviation to be 1.5. If a random sample of 10 games is selected, then find the probability that the mean of the s..

A technician requires to perform preventive maintenance on electronic goods. The mean time is 72 minutes and the standard deviation is 1 hour. For a sample of 45 goods, what is the probability that their average maintenance time exceeds 50 minutes? => 0.071 or 9.929 or..

A retail garment shop receives a shipment of trousers, with a standard length of 49.0 in. and a standard deviation of 1.0 in. A random sample of 32 trousers had a mean length of 48.8 in. State the null hypothesis(H o ) and alternative hypothesis(H a ). => H o : Me..

A population consists of the five numbers 2, 4, 6, 8 and 10. Consider all the samples of size 2 that can be drawn with replacement from the population. Find the mean of the sampling distribution means. Also find the difference between the population mean..

An unfair coin has a 60% chance of landing heads-up. If X = 1 represents a coin landing heads-up, and X = 0 represents a coin landing tails-up, then find the sampling distribution of the mean( x ‾ ) for samples of size 3. => Figure 4 or Figure 2 or Fi..

A cement manufacturer claims that the maximum final setting time of cement is 10 hours. A sample of 13 bags were tested and found that the mean of the maximum final setting time was 11.2 hours with a standard deviation of 1.8 hours. At α = 0.01, can the claim be ..