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You have ordered 10 bags of cement, which are supposed to weigh 94 kg each. The average weight of the 10 bags is 93.5 kg. Assuming that the 10 weights can be viewed as a realization of a random sample from a normal distribution with unknown parameters, construct a 95% confidence interval for the expected weight of a bag. The sample standard deviation of the 10 weights is 0.75.
Calculate the condence interval in R, and write the code you used.
The probability distribution of a random variable X is shown below, where X represents the amount of money (in $1,000s) gained or lost in a particular game of Blackjack.
From an urn containing balls, a ball was drawn, weighted and replaced. This experiment was repeated 5 times. what is the standard error of sample mean?
Test at the .05 significance level the null hypothesis that the population proportions are equal against the two-tailed alternative.
Using a significance level of 0.03, carry out a hypothesis test to determine if there is convincing evidence to support the claim that fewer than half of adult Americans can name at least one justice currently serving on the Supreme Court.
Using symbols state hypotheses (H 0 and H 1 ) for two-tailed test. Sketch suitable distribution and locate critical region for a = 0.05.
a researcher testing the effects of two treatments for anxiety computed a 95 confidence interval for the difference
a survey asks 1400 chief financial officers has the economy forced you to postpone or reduce the amount of vacation you
suppose you have some data gathered from a repeated experiment. if you want to make inferences about the data collected
a frozen-food packer specifies the mean weight of a product as 200 g. the output is normally distributed with a
The random digit dialing machine is expected to reach a live person 15% of the time. In eight attempts, what is the probability of achieving exactly two successful calls?
Compute the value of the test statistic (to 2 decimals).
Study is conducted as to whether there is relationship between joggers and consumption of nutritional supplements.
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