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chemical equation for benzoic acid +copper sulfate+ silicate and precipitate formed
Chalcopyrite (CuFeS2) is a principal mineral of copper. Calculate the number of
kilograms of Cu in 3.71 X 103kg of chalcopyrite.
A university conducted a tracer study to track its graduates for the past five years. One of the variables included in the study questionnaire asks for data on the monthly salaries of the graduates. A sample of 90 graduates yielded a sample mean equal to Php37 000. Construct a 90% confidence interval for the population mean monthly salary if it is known that the population standard deviation is Php9 470. Interpret the result (Write the interpretation in your solution).
A. 37,000 < μ < 39,000
B. 35,350.01 < μ < 38,640.08
C. 35,357.92 < μ < 38,642.08
D. 37,742.92 < μ < 39,875.01
Given a normal distribution with a mean of 200 and the deviation is10. Find the area above 188.
If the sample size n=15, level of significance α=0.05, and a test design of two-tailed test, compute the critical t-value or the rejection region.
PLEASE ANSWER NOW CHOOSE THE CORRECT LETTER
A. 1.7163
B. 1.7530
C. 2.1314
D. 2.1448
If the sample size n=15, level of significance α=0.05, and a test design of two-tailed test, compute the critical t-value or the rejection region.
(SOLUTION)
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DEADLINE : 04/13/2022 11:00 PM
A researcher wants to compare the performance of students living with their parents and
the performance of these students whose parents are working. Random samples were
taken from two normally distributed groups of population. 25 students who are living
with their parents posted an average grade of 91.27 with standard deviation of 3,
whereas the 20 randomly selected students whose parents are working abroad have an
average grade of 88.72 with standard deviation of 3.4. Test whether there is a significant
difference between the two groups of students at 0.05 level of significance.
State the null and alternative hypotheses.
Identify if it is one-tailed test or two-tailed test.
Find its critical value and identify the rejection region.
Compute the pooled variance.
Compute the test statistic.
State the decision and conclusion.
the number of motorcycles sold annually by salespeople is normally distributed with a standard deviation of 15. A random sample of 300 salesperson taken and the mean number of motorcycles sold annually was found to be 75. find the 99% confidence interval estimate of the population mean
Two equally charged particles are held 3.2×10-3 m apart and then released from rest. The initial acceleration of the first particle is observed to be 7.0 m/s2 and that of the second to be 9.0 m/s2. If the mass of the first particle is 6.3 x l0-7 kg, what are (a) the mass of the second particle and (b) the magnitude of the charge of each particle
What is the formula for ns2np4 would form in potassium
