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Q1) Determine probability, P(Z < 0.17), using standard normal distribution.
a) .8300
b) .4325
c) .5675
d) .0675
Q2) Average height of flowering cherry trees in nursery is 11 feet. If heights are normally distributed with standard deviation of 1.6, determine probability that randomly selected cherry tree in this nursery is less than 13 feet tall.
a) 0.67
b) 0.89
c) 0.95
d) 0.11
Q3) Mrs. Smith's reading class can read mean of 175 words per minute with standard deviation of 20 words per minute. Top 3% of class is to get a special award. Determine the minimum number of words per minute student would have to read to get award?
The weight of a product is normally distributed with a standard deviation of .5 ounces. What should the average weight be if the production manager wants no more than 5 percent of the products to weight more than 5.10 ounces.
How large random sample of potential voters will be required to evaluate result with 95% confidence and with margin of error of plus and minus 3%?
What was the critical F value chosen?
A random sample of 52 groups gave a mean of $8.30 with a standard deviation of $2.42. Find a 90% confidence interval for the mean amount left by all groups.
Utilizing the .05 level, do the results support the psychologists' theory. Elucidate your answer to somebody whom has never had a course in statistics.
We have a deck of 52 playing cards. What is the probability of drawing?
If random sample of thirty six customer transactions points out that sample mean withdrawal amount is $172, is there evidence to think that population mean withdrawal amount is no longer $160? Determine the mean of data above?
At the 0.05 significance level, can Ms. Bridgend conclude that she is earning an average of more than $20 in tips?
What is the arithmetic mean selling price?
What percentage of items will weigh between 6.4 and 8.9 ounces?
Temperature in certain city for the month of June follows a uniform distribution over the interval 61° F to 91° F. Find the temperature which 90% of the June days exceeds?
The instructor wanted to "pass" anyone who scored above 69. What proportion of exams will have passing scores?
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