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The average zone of inhibition (in mm) for mouthwash L as tested by the medical technology students has been known to be 9mm. A random sample of 10 mouthwash L was tested and the test yielded an average zone of inhibition of 7.5mm with a variance of 25 mm. Is there enough reason to believe that the anti-bacterial property of the mouthwash has decreased? Test the hypothesis that the average zone of inhibition of the mouthwash is no less than 9mm using 0.05 level of significance.
A. State the hypotheses.
B. Determine the test statistic to use.
C. Determine the level of significance, critical value, and the decision rule.
D. Compute the value of the test statistic.
E. Make a decision.
F. Draw a conclusion.
If the average time spent studying is 10 hours and the standard deviation is 4 hours, what it the probability that a student will spend more than 13 hours studying?
Find a complete integral of the partial differential equation by charpit method. z2 (p2 z2+ q2) = 1
An experimental study wad conducted by a researcher to determine if a new time slot has an effect on the performance of pupils in mathematics . Fifteen randomly selected learners participated in the study . Toward the end of the investigation , a standardized asssesment was conducted. The sample mean x= 75 and s=5 . In standardization of the test, the mean was 65 and standard deviation was 8. Based on the evidence at hand, is the new time slot effective ? Use a= 0.05.
The print rate of shirt is Rs 350. There is discount of 20% on the print rate! What will this shirt cost to the customer?
A person gets an income of 28270 per year. He pays an income tax of 15% and also pays a penalty of 20% of the amount of income Tax Paid. How much amount is the person left with?
A study believes that 70% of adults in the Philippines own a cellphone.
A cellphone manufacturer believes that the actual number is much
less than 70%. 100 Filipino adults were surveyed, of which 74 have
cellphones. Using a 5% level of significance, is the cellphone
manufacturer’s claim valid or not?
The letters in the word TRIANGLE are to be arranged. How many ways can these letters be arranged in a line such that letters E and G appear in adjacent positions?
`Q2. CASE STUDYI ndia is competitive manufacturing locationdue to the low cost of manpower and strongtechnical and engineering capabilitiescontributing to higher quality production runs.The production of TV sets in a factoryancreases every year. It produced 1160000 setsin 2018, 2000000 sets in 2020and 2200000sets in 2021.Based on the above infor mation, answer thefollowing questions:1. Find the total production in the year 2018and 2019.2. In which year, the production was 2 millionsets?3. Find the difference of the production in theyear 2018 and 2020.4. Write 2200000 in words according to HindA rabic number system.
median of an isosceles trapezoid is 8 and the lower base is 14, find the upper base. use the formula: [ median = 1/5 (UB + LB)]
