Search & Filtering
1. At a certain college, new students are weighed when they join the college, new students are weighed when they join the college. The distribution of weights of students at the college when they enroll has a standard deviation of 7.5 kg and a mean of 70kg. A random sample of 90 students from the new entry were weighed and their mean weight was 71.6kg. Assume that the standard deviation has not changed. Test at 5% level, whether there is evidence that the mean of the new entry is more than 70kg.
Perform your hypothesis testing under the 5 steps used when performing a hypothesis test. State your conclusion clearly.
1. Suppose our p-value is .044. What will our conclusion be at alpha levels of .10, .05, and .01?
The function accepts two positive integers ‘r’ and ‘unit’ and a positive integer array ‘arr’ of size ‘n’ as its argument ‘r’ represents the number of rats present in an area, ‘unit’ is the amount of food each rat consumes and each ith element of array ‘arr’ represents the amount of food present in ‘i+1’ house number, where 0 <= i
1. Suppose we are interested in finding a 99% confidence interval for the mean overall score of students at a certain school. Five students are sampled, and their overall scores are 560, 500, 470, 660, and 640.
a. What is the standard error of the sample mean?
b. Find a 90% confidence interval for the mean test score.
1. i. What happens to the margin of error when sample size increases? Does it increase, decrease, or stay the same?
ii. How does this affect the size of the resulting confidence interval?
Implement a standalone product search program in Java, using Hibernate that lists matching products for a user who is looking for T-shirts.
You are given 3 CSV files, each containing the T-shirts data for Nike, Puma and Adidas respectively. Use the same CSV files as provided in Assignment 1. You can add more data in existing files or can add more CSV files for another companies. The data from these files needs to be persisted in the database. All the search operations for the flights will be done on the database using hibernate.
1. i. Compare Z distribution and Normal Distributions.
ii. What are the properties of the t distribution?
iii. Find the values for each.
a. t 𝛼/2 and n = 15 for the 98% confidence interval for the mean
b. t 𝛼/2 and n = 10 for the 90% confidence interval for the mean
If a certain number x is subtracted from 8, it will be equal to two less than four times the same number. The correct equation for the above sentence is: [1] x − 8 = 4x − 2 [2] 8 − x = 4 − 2x [3] 8 − x = 4x − 2 [4] x − 8 = 2x − 4
How many grams of solute is present in 0.4 moles Magnesium hydroxide, Mg(OH)2 in 550 g water, H2O? The molar mass of Mg(OH)2 is 58 g/mol.
Given:
Solution:
How many mL of 0.250 M HCl would react exactly with 30.0 mL of the 0.150 M solution of Ca(OH)2 solution? The chemical reaction involved is: HCl(aq) + NaOH(aq) → NaCl (aq) + H2O (l)
Given:
Solution:
Three balls are drawn in succesion without replacement from a box of 2 red balls. Let R be the random variable representing the number of red balls. Find the values of the random variable R. Complete the table below
