Questions asked
Manisha Sarker
Numerade educator
Question 15 (0.5 points) As gym members left their gym, they were asked how many times they had visited the gym in the last 5 days. Their responses were recorded in the given probability distribution. x 1 2 3 4 5 P(x) 0.22 0.32 0.16 0.20 0.10 According to this data, what is the mean number of times a gym member has been to their gym in the last five days.
Christopher Dzorkpata
Question 13 (0.5 points) Scores on an exam are normally distributed with a mean of 73.5 and standard deviation of 7.5. A random sample of 36 exam scores will be selected. What is the probability that the mean of the 36 scores is more than 75?
Qudsiya Anis
Question 12 (0.5 points) Scores on an exam are normally distributed with a mean of 73.5 and standard deviation of 7.5. What score would you need to be at the 95th percentile?
Robin Corrigan
Question 11 (0.5 points) Scores on an exam are normally distributed with a mean of 73.5 and standard deviation of 7.5. What is the probability that a random student scores above an 80?
Thirty students were randomly sampled to determine the number of classes students take per semester. The sample mean was 4.1 classes and the sample standard deviation was 0.7. Find the value of the margin of error (MOE) for a 90% confidence interval. 0.2102 0.4344 0.2172 0.4202
Using the sample data below, calculate the test statistic for the hypotheses: Ho: ? = 40 Ha: ? ? 40. You may assume the population is approximately normally distributed. 51, 22, 42, 71, 51, 31
A hypothesis test for Ho: p = 0.80 vs. Ha: p < 0.80 was conducted and the p-value was found to be 0.17. If the test was using a level of significance of 0.05, then we should.... reject the null hypothesis fail to reject the null hypothesis not make a decision as we do not have enough information none of the above
A person claims that more than 40% of people filing their tax forms in April will be getting a refund on their federal taxes. The null and alternative hypotheses for this claim are: Ho: p = 0.40 and Ha: p > 0.40 From a random sample of 400 people filing their tax forms in April, it was determined that 168 will be getting a refund on their federal taxes. What is the p-value for this test?
Using the sample data below, calculate the test statistic for the hypotheses: Ho: ? = 40 Ha: ? ? 40. You may assume the population is approximately normally distributed. 51, 22, 42, 71, 51, 31 0.664 0.771 1.578 3.141
A standard six-sided die will be rolled eight times. What is the probability a six is rolled on exactly two of the eight rolls? 0.028 0.260 0.333 0.075
