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A. Find the length of the confidence interval (s = standard deviation)
1. s = 3
n = 250
Confidence level = 95%
2. s = 6
n = 400
Confidence level = 99%
B. Determine the sample size, given the following data.
1. s = 5
E = 2.42
Confidence level = 95%
2. You want to estimate the mean gasoline price within your town to the margin of error of 6 centavos. Local newspaper reports the standard deviation for gas price in the area is 30 centavos. What sample size is needed to estimate the mean gas prices at 99% confidence level?
3. Carlos wants to replicate a study where the highest observed value is 14.8 while the lowest is 14.2. He wants to estimate the population mean µ to the margin of error of 0.025 of its true value. Using 95% confidence level, find the sample size n that he need.
A consumer advocacy group suspects that a local supermarket’s 500 grams of sugar actually weigh less than 50 grams. The group look a random sample of 20 such packages, weigh each one, and found the mean weight for the sample to be 496 grams with standard deviation of 8 grams. Using 1% significance level, would you conclude that the mean weight is less than 500 grams? Also, find the 99% confidence interval of the true mean.
It was found that 90% of cucumber seeds sown in the soil germinate. Determine the most likely
number of germinated grains if there are 70 grains in the package.
U={1,2,3,4,5,6,7,8,9,10}
A={2,3,4,5,8}
B={2,4,6,8,10}
C={1,3,5,7,9}
Instruction: Solve the given below using the sets above
1.( (C U A)-B)’ ∩ (B’ U A)
2.(((BUA)’ U (CUA)’) U ((A-B)’ ∩ (B-C)’))
Using class name studgrade with public data members and functions, create a program that will allow user to enter students A's grades in her five(5) major subjects, compute and display for the average grade of the student.
Suppose you invest R10 000 at a simple interest rate of 12% per year. What would be the value of the accumulated amount after 6 years
Demonstrate an understanding of the scale and size of cells and be able to make order of magnitude calculations, inc standard form
Demand-pull inflation can be combated by …
a.
raising interest rates.
a. raising interest rates.
b.
lowering interest rates.
b. lowering interest rates.
c.
increasing government spending.
c. increasing government spending.
d.
decreasing personal income tax.
The appropriate policy measure to combat inflation would be to …
a.
increase aggregate spending.
a. increase aggregate spending.
b.
decrease taxes.
b. decrease taxes.
c.
decrease productivity.
c. decrease productivity.
d.
increase the repo rate.
Which one of the following statements is correct?
a.
Cost-push inflation is triggered by an increase in consumption spending.
a. Cost-push inflation is triggered by an increase in consumption spending.
b.
Demand-pull inflation creates a situation known as stagflation.
b. Demand-pull inflation creates a situation known as stagflation.
c.
Cost-push inflation is described as “too much money chasing too few goods”.
c. Cost-push inflation is described as “too much money chasing too few goods”.
d.
An earthquake can trigger cost-push inflation.
#340153 on Dec 2023