On 1* June 2021, Al-Ikhsan Sports has developed a new synthetic bag with a mean breaking strength not differs from 8 kilograms and a standard deviation of 0.8 kilograms. If a random sample of 50 bags is tested with a mean breaking strength of 7.7 kilograms, then conduct the hypothesis testing to verify the claim. Given z0o1 =3.125 and a) Fa00s =2.575. b) A sampling of measurements in 40 various locations yielded a mean zinc concentration of 2.5 g/mm. Given the standard deviation of the population as 0.3. i) Obtain 95% and 99% confidence intervals for the mean zinc concentration. Given Za025 = 1.96 and z0.0 = 2.5758. Find the sample size if 95% confidence interval in µ estimation is offby less than 0.05. The loaves of pizza bread distributed to Malaysian stores by Bakery AA have an average of 40 cm and a standard deviation of 2 cm. Assume the lengths following the nomal distribution, then compute the percentage of the loaves that are: c) i) Longer than 0.35 m. ii) Shorter than 420 mm.
Addition Rule of Probability
It simply refers to the likelihood of an event taking place whenever the occurrence of an event is uncertain. The probability of a single event can be calculated by dividing the number of successful trials of that event by the total number of trials.
Expected Value
When a large number of trials are performed for any random variable ‘X’, the predicted result is most likely the mean of all the outcomes for the random variable and it is known as expected value also known as expectation. The expected value, also known as the expectation, is denoted by: E(X).
Probability Distributions
Understanding probability is necessary to know the probability distributions. In statistics, probability is how the uncertainty of an event is measured. This event can be anything. The most common examples include tossing a coin, rolling a die, or choosing a card. Each of these events has multiple possibilities. Every such possibility is measured with the help of probability. To be more precise, the probability is used for calculating the occurrence of events that may or may not happen. Probability does not give sure results. Unless the probability of any event is 1, the different outcomes may or may not happen in real life, regardless of how less or how more their probability is.
Basic Probability
The simple definition of probability it is a chance of the occurrence of an event. It is defined in numerical form and the probability value is between 0 to 1. The probability value 0 indicates that there is no chance of that event occurring and the probability value 1 indicates that the event will occur. Sum of the probability value must be 1. The probability value is never a negative number. If it happens, then recheck the calculation.
answer for question 3 a,b,c
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