the local police force gives all applicants an entrance exam and accepts only those applicants who score in the top 15% on this test. If the mean score this year is 87 and the standard deviation is...

the local police force gives all applicants an entrance exam and accepts only those applicants who score in the top 15% on this test. If the mean score this year is 87 and the standard deviation is...

A bottled water distributor wants to determine whether the mean amount of water contained in? 1-gallon bottles purchased from a nationally known water bottling company is actually 1 gallon. You know...

Given the following information about a sample, calculate a z score for a test grade of 91. = 87, s = 4.01

Your average grade after 5 tests in Biology is a 65. However, after the most recent test your average increased to a 70. What grade did you get on the test in order to increase your average?...

choose at random a young adult aged 19 to 22 years. Ask their age and where they live (with their parents, in their own place, or in some other place such as a college dormitory) here is the probability...

I understand that true experimental designs are the “gold standard” for demonstrating cause & effect due to the fact that investigator can systematically varies a factor, or factors, holds all...

Suppose 12 people are asked to rate themselves in terms of their accumulated wisdom. The first 11 people, being humble, give themselves a zero. The 12th person--with gigantic arrogance--responds by...

An urn contains 3 white marbles and 2 black marbles. Two marbles are drawn without replacement. What is the probability that the first marble drawn is white OR the second is black?

Two-thirds of students have jobs to help with bills in college. If 20 students are surveyed what is the probability that half of the students will have jobs?

for first one I get 0.637 to 0.963 but solution says 0.064 to 0.097 and for part c for second one i get 161 but it says 315. please show how to solve with steps : A survey of 1,058...

I don't get how the confidence intervals for both pars are calculated exactly answers were given as : 0.2644 to 0.3474 for A and 0.1565 to 0.2274 for B For A) I got 0.2684 to 0.3516 I...

Type | Probability 1 ton | 0.25 2 tons | 0.06 5 tons | 0.01 10 tons | 0.11 20 tons | 0.57 An appliance dealer sells 5 types of air conditioners. The above...

You weighed your dog this morning on your bathroom scale. His weight was 15 lb. You decided to weigh him again in the evening, and his weight had increased to 20 lb. This is most likely what type...

1. Chips Ahoy wants to perform a study to determine the number of chocolate chips in their cookies. To that end, they collected a sample of 40 cookies. The mean of this sample is 23.95 chocolate chips...

a. quantitative because the letters probably refer to a count. b. qualitative because the letters probably refer to a class or a category. c. quantitative or qualitative depending on whether...

Readings on a thermometer are normally distributed with a mean of 0C and a standard deviation of 1.00. What is the probability that a randomly selected thermometer reads: • Less...

if a b c are independent events , prove A prime b prime and c prime are also independent events.......

In an election year, we have and will see poll results: Candidate x has a 45% positive rating, Candidate y a 53% positive rating, with 2% undecided. Possible error is 5%. What...

The game called Lotto sponsored by the Louisiana Lottery Commission pays its largest prize when a contestant matches all 5 of the 39 possible numbers. Assume there are 39 ping-pong balls each with...

When would a one tailed test be more desirable than a two tailed test? Give a real world example and explain why the one tailed test would be better.

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