Question

In: Statistics and Probability

Of 575 broiler chickens purchased from various kinds of food stores in different regions of a...

Of 575 broiler chickens purchased from various kinds of food stores in different regions of a country and tested for types of bacteria that cause food-borne illnesses, 66% were infected with a particular bacterium. Construct a 95% confidence interval and explain what your confidence interval says about chicken sold in the country.

Expert Solution

Solution :

Given that,

n = 575

Point estimate = sample proportion = = 0.66

1 - = 1 - 0.66 = 0.34

At 95% confidence level the z is ,

= 1 - 95% = 1 - 0.95 = 0.05

/ 2 = 0.05 / 2 = 0.025

Z_/2 = Z_0.025 = 1.96

Margin of error = E = Z_{/ 2} * $\sqrt$ (( * (1 - )) / n)

= 1.96 * ( $\sqrt$ ((0.66 * 0.34) / 575)

= 0.039

A 95% confidence interval for population proportion p is ,

- E < p < + E

0.66 - 0.039 < p < 0.66 + 0.039

0.621 < p < 0.699

(0.621 , 0.699)

A 95% confidence interval of chicken sold in the country is : (0.621 , 0.699)

orchestra answered 2 years ago

Of 525 broiler chickens purchased from various kinds of food stores in different regions of a...

Of 525 broiler chickens purchased from various kinds of food stores in different regions of a country and tested for types of bacteria that cause food-borne illnesses, 45% were infected with a particular bacterium a) Construct a 95% confidence interval. b) Explain what your confidence interval says about chicken sold in the country. c) A government spokesperson claimed that the sample size was too small, relative to the billions of chickens slaughtered each year, to generalize. Is this criticismvalid?

Of 565 samples of seafood purchased from various kinds of food stores in different regions of...

Of 565 samples of seafood purchased from various kinds of food stores in different regions of a country and genetically compared to standard gene fragments that can identify the species, 45% were mislabeled. a) Construct a 95% confidence interval for the proportion of all seafood sold in the country that is mislabeled or misidentified. The 95% confidence interval is from b) What does the confidence interval say about seafood sold in the country? A. In 95% of samples of seafood...

A magazine published the results of an extensive investigation of broiler chickens purchased from food stores...

A magazine published the results of an extensive investigation of broiler chickens purchased from food stores in 23 regions. Tests for bacteria in the meat showed that 61% of the chickens were contaminated with campylobacter, 19% with salmonella, and 6% with both. a) What's the probability that a tested chicken was not contaminated with either kind of bacteria? b) Are contamination with the two kinds of bacteria disjoint? Explain. c) Are contamination with the two kinds of bacteria independent? Explain.

a) List 3 characteristics that can different broiler breeders from normal layers

Define the following terms Caponization Ovulation Egg sequence Clutch First in sequence and terminal laid in sequence eggs a) List 3 characteristics that can different broiler breeders from normal layers b) Indicate 5 problems associated with broiler breeder reproduction as result of poormanagement c) Suggest 2 management practices to reduce reproductive failure in broiler breeders a) Draw a normal poultry sperm and label parts appropriately. Indicate clearly the tail,mitochondria, nucleus and acrosome regions b) Briefly describe the concept behind...

Harper Chicken Corporation processes and packages chicken for grocery stores. It purchases chickens from farmers and...

Harper Chicken Corporation processes and packages chicken for grocery stores. It purchases chickens from farmers and processes them into two different products: chicken drumsticks and chicken steak. From a standard batch of 12,000 pounds of raw chicken that costs $7,000, the company produces two parts: 2,800 pounds of drumsticks and 4,200 pounds of breast for a processing cost of $2,450. The chicken breast is further processed into 3,200 pounds of steak for a processing cost of $2,000. The market price...

Stuart Chicken Corporation processes and packages chicken for grocery stores. It purchases chickens from farmers and...

Stuart Chicken Corporation processes and packages chicken for grocery stores. It purchases chickens from farmers and processes them into two different products: chicken drumsticks and chicken steak. From a standard batch of 17,000 pounds of raw chicken that costs $9,250, the company produces two parts: 3,400 pounds of drumsticks and 5,700 pounds of breast for a processing cost of $6,502. The chicken breast is further processed into 4,900 pounds of steak for a processing cost of $2,900. The market price...

Rooney Chicken Corporation processes and packages chicken for grocery stores. It purchases chickens from farmers and...

Rooney Chicken Corporation processes and packages chicken for grocery stores. It purchases chickens from farmers and processes them into two different products: chicken drumsticks and chicken steak. From a standard batch of 16,000 pounds of raw chicken that costs $8,950, the company produces two parts: 3,000 pounds of drumsticks and 4,800 pounds of breast for a processing cost of $4,085. The chicken breast is further processed into 4,000 pounds of steak for a processing cost of $2,700. The market price...

Imagine shooting various colors of light at different kinds of metals. Depending on the work function...

Imagine shooting various colors of light at different kinds of metals. Depending on the work function of each metal, the light will or will not have enough energy to knock of an electron. (a) Which of the following metals will NOT emit electrons when visible light (with wavelengths of 380 nmto 700 nm) shines on them? (b) If visible light can cause the metal to emit electrons, specific if electrons will be emitted when red (685 nm) light is used,...

A study asked a random selection of 499 adults from various regions in Israel to complete...

A study asked a random selection of 499 adults from various regions in Israel to complete a survey about whether or not they read while using the toilet. The researchers conducted a test of H0: pi = 0.5 versus Ha: pi ≠ 0.5 where pi is the proportion of adults who read while using the toilet. a. Use a theory-based method to find the rejection region of the test using a significance level of a = 0.1 and phat as...

from a plant's perspective, is it better to be visited by many different kinds of pollinators...

from a plant's perspective, is it better to be visited by many different kinds of pollinators or by a single species?