Uyen is learning how to cook boba. She is using the same amount of boba precooking...

Uyen is learning how to cook boba. She is using the same amount of boba precooking and weighing the cooked boba every time she makes it. She knows that the weight of the boba varies by σ = .48 pounds. Uyen takes a random sample of 64 batches of boba, and finds for this sample that the mean weight is 2.23 pounds.

a) Check the requirements for a confidence interval.

b) You want to construct a 85% confidence interval. Find zα/2 .

c) Construct the 85% confidence interval to estimate the mean weight of all boba. Round to 2 decimal places.

d) Interpret this interval

e) Consider the some of the same information. Uyen is interested in making a 99% confidence interval, estimating the population mean within .15 pounds. What is the sample size that Uyen should take?

Solutions

Expert Solution

The solution to this problem is given below

Thus in (e) the sample size is 68.

orchestra answered 1 year ago

Next > < Previous

Related Solutions

15) Suppose that the amount of time required to perfectly cook a waffle is known to...

15) Suppose that the amount of time required to perfectly cook a waffle is known to be normally distributed, with mean of 236 seconds and variance of 5 seconds squared. (Note: I'm just making this up for the sake of this question, please don't ruin your waffles cooking them this way) What z-score would you use to find the probability that a waffle will be perfectly cooked in 236 seconds or less? (Round your answer to two decimal points) 16)Suppose...

colleague has told you she is interested in learning if using iPads as teaching tools will...

colleague has told you she is interested in learning if using iPads as teaching tools will affect students’ performance on a practice standardized math test. She plans to have the students complete the practice test at the beginning and end of the third nine weeks. What type of hypothesis test would you recommend she perform? What would you tell her if she asked for a basic overview of the test and why she should use it?

Zahra, a career oriented mother, hardly got time to cook for the family. She decided to...

Zahra, a career oriented mother, hardly got time to cook for the family. She decided to hire a cook but was not able to find one who could cook according to the taste of the family. Her sister Huda sensed that this problem is not only faced by her sister but also by many working women. She launched a website namely ‘Dial for food’ where housewives who had culinary ability and were interested to cook could drop in their contact...

Using the same amount of resources, China and Japan can each produce oranges and salmonberries as...

Using the same amount of resources, China and Japan can each produce oranges and salmonberries as shown in the following table, measured in thousands of bushels. China Japan oranges salmonberries oranges salmonberries 12 0 6 0 3 3 3 3 0 4 0 6 Which country has the comparative advantage in producing salmonberries? Which one has the comparative advantage in producing oranges? Explain. Suppose that each country is currently producing 3 thousand bushels of salmonberries and 3 thousand bushels of...

How is reproduciblilty is affected if same personnel using the same test but different methods

1. Consider two individuals. Both earn the same amount and choose to save the same amount....

1. Consider two individuals. Both earn the same amount and choose to save the same amount. However, the first agent is more risk averse than the second. i) Do you expect the saving portfolios to be different for the two agents? Which of the two is more likely to hold stocks? Now, assume that the second individual is actually much wealthier than the first. ii) Do you expect the two agents to rely on the same type of financial intermediaries?...

Learning disabilities are often thought of as school problems. Explain how the same underlying disorder (e.g.,...

Learning disabilities are often thought of as school problems. Explain how the same underlying disorder (e.g., dyslexia) can exist both in preschool years and again after the child is in school but often not be diagnosed until as late as the third grade. (The distinctions between disorder and disability should be useful here.)

How much more is a perpetuity of $1000 worth than an annuity of the same amount...

How much more is a perpetuity of $1000 worth than an annuity of the same amount for 18 years? Assume an interest rate of 8% and cash flows at the end of each period.

How much more is a perpetuity of $1600 worth than an annuity of the same amount...

How much more is a perpetuity of $1600 worth than an annuity of the same amount for 24 years? Assume an annual interest rate of 13% and cash flows at the end of each period. Given annual compounding.

Subjects