


Audrey Andrews
The University of Texas at El Paso
Statistics
Statistics teacher | Experienced educator in USA
Greetings! I'm a passionate educator with a Statistics major from The University of Texas at El Paso. My commitment to fostering understanding spans various subjects. Whether unraveling the intricacies of data analysis or simplifying complex concepts, my goal is to empower students with knowledge. Let's embark on a journey of learning together!
Questions
- 1545 subjects were given ginko & 1524 placebo. In ginko group, 246 developed dementian & in the placebo it was 277 with dementia. Significance level=0.01 to test claim(ginko is effective in dementia) Can you test claim and construct confidence interval?
- Trevor bought 3 new pairs of jeans and 2 new sweaters for school. How many different clothing combinations can he make?
- Of the water lilies in the pond, 43% are yellow. The others are white. A frog randomly jumps onto a lily. What is the complement of the frog landing on a yellow lily and its probability?
- If Debbie has 3 blouses and 4 skirts, how many different outfits of a blouse and skirt can she wear?
- Tommy is making a greeting card on his computer. He can choose 1 of 4 backgrounds, 1 of 7 photos, and 1 of 6 text colors. How many ways can Tommy make a greeting card?
- You have a coin which is loaded so that the probability of tossing heads is .55. If you toss the coin three times, what is the probability that you will obtain three heads?
- A coin is flipped 18 times, and it comes up tails 12 times. What is the experimental probability of the coin's coming up tails?
- In a normal distribution of 100, what percent of scores would be expected to find between z=1.30 and z=1.90 ?
- You have 6 Scrabble tiles with different letters of the alphabet in a bag. If you select 3 tiles, how many distinct sequences can you form if the order matters?
- Suppose a bag contains 4 white chips and 6 black chips. What is the probability of randomly choosing a white chip, not replacing it, and then randomly choosing another white chip?
- What is the probability of drawing a heart from a deck of cards?
- What is the regression equation based on the following?: {(1,2),(2,3),(4,2),(5,6),(8,7)}
- The length of a screw produced by a machine is normally distributed with a mean of 0.25 inches and a standard deviation of 0.01 inches. What percent of screws are between 0.24 and 0.26 inches?
- What is the mode, median, and mean of 8, 2, 8, 5, 5, 8?
- Given the word 'Asasi'. how many ways can three of the letters be chosen and written in a row?
- A bag contains 5 red marbles, 7 green marbles, and 3 orange marbles. What is the probability of drawing a red marble?
- Why are class boundaries necessary for grouped data?
- What is the mode of the numbers: 4, 7, 2, 4, 2, 2, 8, 7, 4, 2?
- What is the probability of rolling a sum of 10 with two dice?
- A student has test scores of 68, 75, and 79 points. What must she score on the fourth exam to have an average score of at least 80 points?