Question

In: Statistics and Probability

1. the average lifespan of a jellyfish is 5 months. Spongebob takes a sample of 17...

1. the average lifespan of a jellyfish is 5 months. Spongebob takes a sample of 17 jellyfish to determine if jellyfish near him are living longer than that. In the above scenario, we should be using a (Hypothesis Test or Confidence Interval) procedure, it is using (Proportions or Means) and it has (1 or 2) populations

2. Question 12 Do the majority (more than 50%) of criminals are released from jail wind up in jail again? 3000 released criminals were tracked. In the above scenario, we should be usinga (Hypothesis Test or Confidence Interval) procedure, it is using (Proportions or Means) and it has (1 or 2) populations

3. Is Albany colder than Altlanta? 100 randomly selected days in winter were analyzed for each city and compared In the above scenario, we should be using a (Hypothesis Test or Confidence Interval) procedure, it is using (Proportions or Means) and it has (1 or 2) populations

4. Do dog owners prefer the outdoors more than cat owners? 100 dog owners and 100 cat owners were asked if they prefer to be inside or outside. In the above scenario, we should be using a (Hypothesis Test or Confidence Interval) procedure, it is using (Proportions or Means) and it has (1 or 2) populations

5. Charmin wishes to estimate the difference between the number of rolls of toilet paper people in Los Angeles county have to how many those in Ventura county have. To find out, the company asks several households in each county how many they have currently in their house. In the above scenario, we should be using a (Hypothesis Test or Confidence Interval) procedure, it is using (Proportions or Means) and it has (1 or 2) populations

6. In a random sample of 135 students, 55% of women said they prefer coffee over tea and 67% of men said they prefer coffee over tea. We wish to find the true difference between men and women who prefer coffee over tea. and it has In the above scenario, we should be using a (Hypothesis Test or Confidence Interval) procedure, it is using (Proportions or Means) and it has (1 or 2) populations

Solutions

Expert Solution


Related Solutions

For a certain urban area, in a sample of 5 months, an average of 28 mail...
For a certain urban area, in a sample of 5 months, an average of 28 mail carriers were bitten by dogs each month. The standard deviation of the population is 3 mail carriers. Find the 90% confidence interval of the true mean number of mail carriers who are bitten by dogs each month.
A random sample of 5 months in an urban area showed an average of 28 mail...
A random sample of 5 months in an urban area showed an average of 28 mail carriers were bitten by dogs. If the population is normal and the standard deviation of the sample is 3 find the 95% confidence interval for the population mean.
QUESTION 17 If a sample average is found to be 62.7, and the margin of error...
QUESTION 17 If a sample average is found to be 62.7, and the margin of error is calculated to be 4.6, then the upper end of the confidence interval for mu would be ______ QUESTION 18 If a sample average is found to be 18, and the margin of error is calculated to be 0.06, then the lower end of the confidence interval for mu would be ______ QUESTION 19 Use your TI83 to find the upper end of the...
1. A researcher studying the lifespan of a certain species of bacteria. A preliminary sample of...
1. A researcher studying the lifespan of a certain species of bacteria. A preliminary sample of 35 bacteria reveals a sample mean of ¯ x = 64 x ¯ = 64 hours with a standard deviation of s = 5.6 s = 5.6 hours. He would like to estimate the mean lifespan for this species of bacteria to within a margin of error of 0.5 hours at a 98% level of confidence. What sample size should you gather to achieve...
1. Over 9 months, a random sample of 100 women were asked to record their average...
1. Over 9 months, a random sample of 100 women were asked to record their average menstrual cycle length (in days). The sample average was 28.86 days, with a sample standard deviation of 4.24 days. (a) Calculate the lower bound for the 90% confidence interval for the true average menstrual cycle length. (b) Calculate the upper bound for the 90% confidence interval for the true average menstrual cycle length. (c) Interpret the confidence interval found in (a,b) in terms of...
A sample of 17 states found that the average cigarette tax was 91.06 cents with a...
A sample of 17 states found that the average cigarette tax was 91.06 cents with a standard deviation of 38.37 cents. Find the 90% confidence interval for the cigarette tax in all 50 states. Then find the 95% confidence interval for the cigarette tax in all 50 states. How do the confidence intervals compare?
A sample of 5 months of sales data provided the following information: Month 1 2 3...
A sample of 5 months of sales data provided the following information: Month 1 2 3 4 5 Units Sold 96 110 85 96 93 Develop a point estimate of the population mean number of units sold per month (to 1 decimal). Develop a point estimate of the population standard deviation (to 2 decimals).
A simple random sample of 5 months of sales data provided the following information: Month: 1...
A simple random sample of 5 months of sales data provided the following information: Month: 1 2 3 4 5 Units Sold: 94 85 85 94 92 (a) Develop a point estimate of the population mean number of units sold per month. x = (b) Develop a point estimate of the population standard deviation. If required, round your answer to two decimal places. s =
17. In a random sample of 30 business students, the average time to complete a statistics...
17. In a random sample of 30 business students, the average time to complete a statistics exam was 43.4 minutes. Assume that the population standard deviation to complete the exam is 8.7 minutes. The margin of error for an 80% confidence interval around this sample mean is ________.
1 (a). A put option with an exercise price of $17 that expires in 4 months...
1 (a). A put option with an exercise price of $17 that expires in 4 months currently costs $3. The stock price is currently $18 and the risk-free rate of return is 0.04. What is a call option worth (same exercise price and expiry)? (b) Draw the profit diagram (at expiry) for the put option from part (a)
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT