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1: You work for a research firm that has been contracted to estimate the mean interest on credit card debit in 2019. Past studies have shown the standard deviation to be $2,050. Make a decision for your research firm: Determine with 98% confidence the number of accounts that must be sampled to estimate the mean interest to within $200.
2: Power + Inc produces AA batteries used in remote controlled toy cars. The life of these batteries follows a normal distribution with a mean of 35.0 hours and a standard deviation of 5.5 hours. As a part of its Quality Assurance program, Power + tests samples of 25 batteries. What is the probability of the sample average beting greater than 36.5 hours?
Take your answer to four decimal places.
A consumer organization wants to know whether there is a difference in the price of a particular toy at three different types of stores.The price of the toy was checked in a sample of five discount stores, five variety stores, and five department ..
question weight of navel orangessuppose that the weight of navel oranges is normally distributed with mean micro 8
From the course text and research I am able to create a frequency band with a single number (ie. 10, 20, 30, etc.). However, I am having difficulty creating the band with a number range (ie. $0-$999,999 or $1,000,000-$5,000,000).
What is the probability that the birth weight of a randomly selected baby of this type:
Find the 95% confidence interval of the mean score for all golfers if this is a sample of 80 golfers instead of a sample of 50.
Construct a simple frequency distribution of these scores.- Construct a grouped frequency distribution of these scores that includes both frequencies and relative frequencies.
The weight of a small Starbucks coffee is a normally distributed random variable with a mean of 370 grams and a standard deviation of 15 grams. Find the weight that corresponds to each event:
A woman who has just moved to a new job in a new town discovers two routes to drive from her home to work. The first Monday, she flips a coin.
When Billionaires Made Their First Million The histogram shows frequencies for the ages of 17 billionaires when they made their first million listed at inc.com.
Using a grammar for the C programming language, try to extend the syntax so that a compound statement can appear to compute a value. In other words, allow a compound statement to appear wherever a simple constant or identifier could appear.
State the null and alternative hypotheses to be tested. Compute the test statistic. Determine the critical value for this test at the 0.05 level of significance. What do you conclude?
Discuss using a 5dB exchange exchange rate versus a 3dB exchange rate in protecting workers hearing. Make a case for the use of either the 90dBA PEL and 5dB exchange rate or the 85dB REL and a 3dB exchange rate?
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