what is the problem with the design of the following experiment?

sandra has three dogs: a husky, a golden retriever, and a chihuahua. she wonders what types of food dogs like the most. she feeds the husky and golden retriever a bowl of fish flavored dog food in the morning. then she takes them on a long walk and feeds them chicken flavored dog food for lunch. then they rest at home for the afternoon, and she feeds them beef flavored dog food for dinner. she feeds the chihuahua a cheeseburger for every meal.

Sandra serves the chihuahua a cheeseburger in every meal so there is no other option available for the chihuahua. Because of that, Sandra finds it difficult to know the choice of the chihuahua.

Given that Sandra has a husky, a golden retriever and a chihuahua.  The husky and golden retriever has a set routine for all three meals of the day.

The husky and golden retriever has a bowl of fish-flavored food in their first meal. Then they go for walk and have chicken-flavored food for lunch. They take a rest in the afternoon and have beef-flavored food for dinner.

The chihuahua has only a cheeseburger in every meal. He does not go for walk or take a rest at home in the afternoon. He has no choice of food for the meals. In other words, the chihuahua has a monotonous routine for all meals of the day. So because of this, Sandra finds it difficult about the choice of the chihuahua.

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The chihuahua has no choice, so how can she determine what food the dog would prefer.

a) The laser device

b) The tape

Explanation:

First, there is a need to understand what accuracy and precision mean.

Accuracy is the closeness of a measurement to its true (pre-determined) value.

Precision is the closeness of repeated measurements to each other.

Since 1 feet = 12 inches, then, 5 feet and 5.2 inches would be equivalent to 65.2 inches. This value represents the true value of my height.

The tape measured the height as 65 3/8, which is equivalent to 65.375 inches.

The laser device measured the height as 65.31.

Error = true value - measured value

Absolute error from the tape = 65.2 - 65.375

                                       = -0.175 inches

Absolute error from laser device = 65.2 - 65.31

                                 = -0.11

a) The magnitude of error from the tape is more than that of the laser device. Hence, the laser device is said to be more accurate.

b) Even though there were just single readings from both instruments, the tape can be read to the nearest 1/8 of an inch and as such, can give more precisive measurements than the laser device.