A noted psychic was testing for ESP. The psychic was presented with 200 cards face down and asked to determine if the card featured one of five symbols: star, cross, circle, square, or three wavy lines. The psychic was correct in 48 cases.
a. If p represents the proportion of correct guesses the psychic made, what is the standard error of p?

The standard error of proportion = 0.0301

Step-by-step explanation:

Explanation:-

a) Given the psychic was presented with 200 cards face down and asked to determine if the card featured one of five symbols: star, cross, circle, square, or three wavy lines.

The sample size 'n' = 200

Given the psychic was correct in 48 cases.

The sample proportion of given data

Standard error of proportion:-

The standard error of proportion

Conclusion:-

The standard error of proportion = 0.0301

15

step-by-step explanation:

we are given the following expression and we are to solve it and find the product:

-13 × (-5)

solving the given expression in the standard order of solving a mathematical expression, beginning with the opening of brackets and then multiplying the terms and changing their signs.

-3 × -5 = 15 (answer is positive because when negative is multiplied with negative, it gives a positive answer)

168

step-by-step explanation:

i am pretty sure that the answer is 168