1)You measure 32 dogs' weights, and find they have a mean weight of 56 ounces. Assume the population standard deviation is 7.8 ounces. Based on this, construct a 90% confidence interval for the true population mean dog weight.

Give your answers as decimals, to two places

_______________________ +_ ___________________ ounces

2)You measure 42 backpacks' weights, and find they have a mean weight of 54 ounces. Assume the population standard deviation is 13.6 ounces. Based on this, construct a 99% confidence interval for the true population mean backpack weight.

Give your answers as decimals, to two places

________________ +_ __________________ ounces

3)Supposen = 34, x-bar=41and=7.6. Based on this, what is the margin of error associated with a 99% confidence interval for the true population mean.

Margin of error =_________Round to 2 decimal places.

4) Suppose a sample of size 34 has a sample mean of 58 and a population standard deviation of 6.2. Based on this, what is the maximal margin of error associated with a 90% confidence interval for the true population mean.

Margin of error =____________

Round to 2 decimal places.